Kat Rudu

Kat Rudu Hydra Cell Bright Citrus Moisturizer

Name: Kat Rudu - Hydra Cell Bright Citrus Moisturizer
Brand: Kat Rudu

Efficacy100/100IrritancyHigh

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Works for

2 of 2 advertised claims delivered

Moisturizing

Palmitoyl tripeptide-5, Panthenol + 17 more

Strong evidence

What the product description says

“Hydra Cell Bright Citrus Moisturizer”

From product name

This product can help improve hydration of the skin with the two types of ingredients.

The first type is called “humectants”:
these ingredients help attract water. When humectants are on the surface of the skin, they “pull in” the moisture from the outside environment, or from within deeper layers of the skin. The following ingredients in this product do the job: glycerin, hyaluronic acid.

This product also contains ingredients called “occlusives”. They help reduce the speed with which our skin loses moisture to the outside environment. These ingredients also help soften the upper layer of the skin, so it feels less tight and nicer to the touch. The following ingredients in this product do the job: butyrospermum parkii butter, helianthus annuus seed oil.

The following ingredients in this product are especially good for supporting the skin barrier and helping with the hydration level: niacinamide, palmitoyl tripeptide-5, panthenol

Palmitoyl tripeptide-5HeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.6–0.9%

PanthenolHero· HumectantEffect: HighHelps attract water to the upper layer of the skin and can help improve skin barrier function~0.6–0.9%

Persea gratissima oilKey active· EmollientEffect: HighAn emollient that helps soften the skin and could be helpful in repairing its barrier function~1.1–1.3%

Simmondsia chinensis seed oilKey active· Emollient, OcclusiveEffect: HighSoftens the upper layer of skin and helps restore the healthy skin barrier. Has shown to help calm down inflammation in skin. It is a stable oil, meaning that it retains its properties even when exposed to air.~1–1.2%

Helianthus annuus seed oilKey active· Emollient, OcclusiveEffect: HighA great emollient due to its high linoleic acid content. One of the most effective plant oils in helping skin hydration and repairing skin barrier function~3–3.6%

Helianthus annuus extractKey active· EmollientEffect: HighHelps soften the upper layer of the skin~2.1–2.5%

GlycerinKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant~3.4–4.1%

Ganoderma lucidum extractKey activeEffect: HighHelps attract water to the upper layer of the skin~1.1–1.3%

Centella asiatica extractKey activeEffect: HighA plant extract that has been shown to be able to reduce inflammation in skin, support restoration of skin barrier function, as well as support collagen production. Contains active compounds called centelloids: asiaticoside, madecasosside, asiatic acid and madecassic acid. Might be helpful in preventing stretch marks. It can be itself be irritating though.~0.65–0.95%

Butyrospermum parkii butterKey active· Emollient, OcclusiveEffect: HighA great moisturising ingredient that softens the skin and reduces water loss from its upper layer. It also can be helpful in protecting skin from free radicals~1–1.3%

Vitis vinifera seed oilKey active· EmollientEffect: HighA great emollient that can also have anti-oxidant properties~0.75–1.15%

Hyaluronic acidKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin. Naturally present in skin. Typically has large molecule size unless advertised otherwise on the product label. Helps support skin's barrier function and may help to reduce inflammation~0.6–0.9%

NiacinamideHeroEffect: HighIs proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production~1.7–2.1%

Glyceryl stearate· EmollientEffect: LowAn emollient that softens the skin and forms a protective layer on its surface. Helps water and oil mix together~1.5–1.8%

Caesalpinia spinosa gum· EmollientEffect: Low~0.75–1.15%

Aloe barbadensis extract· HumectantEffect: LowTraditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skin~4.9–6%

Aloe barbadensis leaf juice· HumectantEffect: LowTraditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skin~26–31%

Camellia sinensis leaf extractEffect: LowCan contain potent anti-oxidant compounds (abbreviated ECG, GCG, EGC, and EGCG) that might help protect the skin from free radicals. Can help calm down inflammation and has some anti-bacterial properties. Unfortunately, these antioxidants are unstable and lose their effectiveness very quickly in products. The concentration of the antioxidant compounds in the extract also tends to be low to be effective in topical formulation~0.6–0.9%

TocopherolEffect: Low, below effective dosePure form of vitamin E. Can help moisturise and protect the skin from free radicals. Often used to help stabilise other ingredients or the formula itself~0.65–0.95%

Evens skin tone

Niacinamide, Glycolic acid + 2 more

Strong evidence

What the product description says

“Over time Hydra Cell Bright Citrus Moisturizer evens tone so the skin is luminous, radiant, and incredibly supple.”

Source: N/A

This product can help reduce hypepigmentation and even out the skin tone because it contains the following effective ingredients: glycolic acid, niacinamide

The following ingredient (ingredients) in this product might be helpful, but there is no evidence to confirm that it actually can help even out the skin tone: glycyrrhiza glabra root extract.

Keep in mind that you would need to apply any topical skincare targetted at hypigmentation consistently for a couple of months to get a result. No topical skincare product can help get rid of hyperpigmentation (including post-acne marks and age spots) instantly.

NiacinamideKey activeEffect: HighIs proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production~1.7–2.1%

Glycolic acidKey activeEffect: HighAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid~0.6–0.9%

Glycyrrhiza glabra root extractEffect: LowA plant extract that can help lighten the skin and calm down inflammation. Might be helpful in neutralizing free radicals~0.6–0.9%

Anti-oxidation

Not advertised by the brand · Astaxanthin, Haematococcus pluvialis extract + 13 more

Strong evidence

This product contains antioxidants (astaxanthin) that can help neutralize free radicals in skin. By doing so, they can lessen the damage the skin gets from the UV light (sun).

The following ingredients - camellia sinensis extract, camellia sinensis leaf extract, centella asiatica extract, haematococcus pluvialis extract also can have an antioxidant effect, but there is less evidence to confirm their effectiveness in skin.

AstaxanthinKey activeEffect: HighHelps neutralize free radicals in skin and might help to calm down inflammation~0.6–0.9%

Haematococcus pluvialis extractKey activeEffect: MediumGreen algae extract that might contain antioxidant astaxanthin~0.6–0.85%

Camellia sinensis extractKey activeEffect: MediumTea extract. Might be helpful in neutralizing free radicals in skin~0.6–0.85%

Centella asiatica extractKey activeEffect: MediumA plant extract that has been shown to be able to reduce inflammation in skin, support restoration of skin barrier function, as well as support collagen production. Contains active compounds called centelloids: asiaticoside, madecasosside, asiatic acid and madecassic acid. Might be helpful in preventing stretch marks. It can be itself be irritating though.~0.65–0.95%

Camellia sinensis leaf extractKey activeEffect: MediumCan contain potent anti-oxidant compounds (abbreviated ECG, GCG, EGC, and EGCG) that might help protect the skin from free radicals. Can help calm down inflammation and has some anti-bacterial properties. Unfortunately, these antioxidants are unstable and lose their effectiveness very quickly in products. The concentration of the antioxidant compounds in the extract also tends to be low to be effective in topical formulation~0.6–0.9%

Salix alba bark extractEffect: LowA plant extract that can help neutralize free radicals in skin. It contains a compound salicin that can theoretically be converted into salicylic acid that, in turn, helps reduce inflammation in skin, but the evidence of effectiveness in skin is lacking and the extract is usually not used in a concentration that would enable an exfoliating effect~0.45–0.7%

Butyrospermum parkii butterEffect: LowA great moisturising ingredient that softens the skin and reduces water loss from its upper layer. It also can be helpful in protecting skin from free radicals~1–1.3%

Daucus carota sativa seed oilEffect: LowA plant oil that might help neutralize free radicals and have an anti-bacterial effect~0.95–1.2%

Glycyrrhiza glabra root extractEffect: LowA plant extract that can help lighten the skin and calm down inflammation. Might be helpful in neutralizing free radicals~0.6–0.9%

Schisandra chinensis fruit extractEffect: LowA berry extract that might help neutralize free radicals on the surface of the skin~0.5–0.7%

Rubus idaeus extractEffect: LowMostly used as a fragrance. Might have some anti-oxidant effect~0.75–1.1%

Vitis vinifera seed oilEffect: LowA great emollient that can also have anti-oxidant properties~0.75–1.15%

Daucus carota sativa root extractEffect: LowCarrot extract. Might have anti-oxidant properties and be used to add orange color~0.75–1.15%

TocopherolUnder-dosedEffect: HighPure form of vitamin E. Can help moisturise and protect the skin from free radicals. Often used to help stabilise other ingredients or the formula itself~0.65–0.95%

Sodium ascorbyl phosphateUnder-dosedEffect: MediumA stable derivative of vitamin C. It is oil-soluble which means it is more likely to penetrate the skin compared to the pure form of vitamin C (which is water-soluble), but it is less bio-available and is way less effective in stimulating collagen and reducing wrinkles compared to the pure form of vitamin C (L-ascorbic acid) and its other derivatives (for example, magnesium ascorbyl phosphate). At the same time, this vitamin C derivative has been shown in studies to be effective in reducing acne, blemishes and clogged pores. It is less irritating then the pure form of vitamin C~1.2–1.5%

Exfoliation

Not advertised by the brand · Glycolic acid, Salix alba bark extract

Strong evidence

This product can help exfoliate the skin. In other words, it helps break down the bonds between dead cells on the surface of the skin and speed up the skin turnover. Skin often appears softer and brighter after exfoliation, but overdoing it can result in disrupted skin barrier. The following ingredient is doing the exfoliating job in this product: glycolic acid.

Anti-aging

Not advertised by the brand · Glycolic acid, Niacinamide + 9 more

Strong evidence

This product can help reduce and prevent fine lines and wrinkles, improve skin elasticity and firmness because it contains glycolic acid, niacinamide.

These ingredients in the product can also be helpful, even though there is less evidence for their effectiveness: astaxanthin, centella asiatica extract, palmitoyl tripeptide-5.

Keep in mind that it typically takes at least 6 weeks to notice any results because the changes that are needed to improve fine lines and elasticity happen in the deeper layers of the skin. No topical anti-aging product can “erase” wrinkles or fully reverse signs of aging.

Palmitoyl tripeptide-5Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.6–0.9%

AstaxanthinKey activeEffect: MediumHelps neutralize free radicals in skin and might help to calm down inflammation~0.6–0.9%

Hyaluronic acidEffect: LowOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin. Naturally present in skin. Typically has large molecule size unless advertised otherwise on the product label. Helps support skin's barrier function and may help to reduce inflammation~0.6–0.9%

Aloe barbadensis leaf juiceEffect: LowTraditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skin~26–31%

Sodium ascorbyl phosphateEffect: Low, below effective doseA stable derivative of vitamin C. It is oil-soluble which means it is more likely to penetrate the skin compared to the pure form of vitamin C (which is water-soluble), but it is less bio-available and is way less effective in stimulating collagen and reducing wrinkles compared to the pure form of vitamin C (L-ascorbic acid) and its other derivatives (for example, magnesium ascorbyl phosphate). At the same time, this vitamin C derivative has been shown in studies to be effective in reducing acne, blemishes and clogged pores. It is less irritating then the pure form of vitamin C~1.2–1.5%

Anti-blemish

Not advertised by the brand · Niacinamide, Glycolic acid + 5 more

Good evidence

This product might be able to help reduce blemishes and clogged pores because it contains niacinamide.

The following ingredient (ingredients) in this product might be helpful, but there is no evidence to confirm that it actually works: glycolic acid

Glycolic acidKey activeEffect: MediumAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid~0.6–0.9%

Centella asiatica extractEffect: LowA plant extract that has been shown to be able to reduce inflammation in skin, support restoration of skin barrier function, as well as support collagen production. Contains active compounds called centelloids: asiaticoside, madecasosside, asiatic acid and madecassic acid. Might be helpful in preventing stretch marks. It can be itself be irritating though.~0.65–0.95%

Sodium ascorbyl phosphateUnder-dosedEffect: HighA stable derivative of vitamin C. It is oil-soluble which means it is more likely to penetrate the skin compared to the pure form of vitamin C (which is water-soluble), but it is less bio-available and is way less effective in stimulating collagen and reducing wrinkles compared to the pure form of vitamin C (L-ascorbic acid) and its other derivatives (for example, magnesium ascorbyl phosphate). At the same time, this vitamin C derivative has been shown in studies to be effective in reducing acne, blemishes and clogged pores. It is less irritating then the pure form of vitamin C~1.2–1.5%

Can it cause trouble?

Irritancy

6 strong irritants: Cochlearia armoracia root extract, Melissa officinalis flower/leaf/stem extract + 4 more — patch-test recommended

High risk

We flagged 24 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.

IngredientFunctionIrritationEst. amount

Rubus idaeus extractMostly used as a fragrance. Might have some anti-oxidant effectHigh~0.75–1.1%est.

Glycolic acidAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acidHigh~0.6–0.9%est.

Cochlearia armoracia root extractA plant root extract that has antimicrobial properties and can mask the smell of other ingredientsHigh~0.6–0.9%est.

Melissa officinalis flower/leaf/stem extract—High~0.55–0.85%est.

Citrus limon fruit extractUsed as a fragrance. Can be irritating and cause photosensitivityHigh~0.6–0.85%est.

Salix alba bark extractA plant extract that can help neutralize free radicals in skin. It contains a compound salicin that can theoretically be converted into salicylic acid that, in turn, helps reduce inflammation in skin, but the evidence of effectiveness in skin is lacking and the extract is usually not used in a concentration that would enable an exfoliating effectHigh~0.45–0.7%est.

Citrus sinensis peel oil expressed—High~0.4–0.6%est.

Citrus aurantium dulcis seed oil—High~0.45–0.65%est.

Citrus limon peel oilA highly irritating fragranceHigh~0.3–0.6%est.

Aloe barbadensis leaf juiceTraditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skinMedium~26–31%est.

Aloe barbadensis extractTraditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skinMedium~4.9–6%est.

Sodium ascorbyl phosphateA stable derivative of vitamin C. It is oil-soluble which means it is more likely to penetrate the skin compared to the pure form of vitamin C (which is water-soluble), but it is less bio-available and is way less effective in stimulating collagen and reducing wrinkles compared to the pure form of vitamin C (L-ascorbic acid) and its other derivatives (for example, magnesium ascorbyl phosphate). At the same time, this vitamin C derivative has been shown in studies to be effective in reducing acne, blemishes and clogged pores. It is less irritating then the pure form of vitamin CMedium~1.2–1.5%est.

Ganoderma lucidum extractHelps attract water to the upper layer of the skinMedium~1.1–1.3%est.

Persea gratissima oilAn emollient that helps soften the skin and could be helpful in repairing its barrier functionMedium~1.1–1.3%est.

Simmondsia chinensis seed oilSoftens the upper layer of skin and helps restore the healthy skin barrier. Has shown to help calm down inflammation in skin. It is a stable oil, meaning that it retains its properties even when exposed to air.Medium~1–1.2%est.

Vitis vinifera seed oilA great emollient that can also have anti-oxidant propertiesMedium~0.75–1.15%est.

Caesalpinia spinosa gum—Medium~0.75–1.15%est.

Centella asiatica extractA plant extract that has been shown to be able to reduce inflammation in skin, support restoration of skin barrier function, as well as support collagen production. Contains active compounds called centelloids: asiaticoside, madecasosside, asiatic acid and madecassic acid. Might be helpful in preventing stretch marks. It can be itself be irritating though.Medium~0.65–0.95%est.

Glycyrrhiza glabra root extractA plant extract that can help lighten the skin and calm down inflammation. Might be helpful in neutralizing free radicalsMedium~0.6–0.9%est.

AstaxanthinHelps neutralize free radicals in skin and might help to calm down inflammationMedium~0.6–0.9%est.

Haematococcus pluvialis extractGreen algae extract that might contain antioxidant astaxanthinMedium~0.6–0.85%est.

Schisandra chinensis fruit extractA berry extract that might help neutralize free radicals on the surface of the skinMedium~0.5–0.7%est.

Dehydroacetic acidA preservativeMedium~0.3–0.55%est.

Sodium dehydroacetateA preservativeMedium~0.3–0.55%est.

Comedogenic

1 ingredient rated 2 or more on the 0–5 pore-clogging scale

1 flagged

These ingredients have a comedogenic rating of 2 or more on a 0–5 scale; the table shows each one's rating. In leave-on products they can clog pores in acne-prone skin.

IngredientFunctionRatingEst. amount

Butyrospermum parkii butterA great moisturising ingredient that softens the skin and reduces water loss from its upper layer. It also can be helpful in protecting skin from free radicals3/5~1–1.3%est.

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Ingredients

Filter by role to see what each ingredient is doing.

Aloe barbadensis leaf juice~26–31%

Irritant · medium

Irritation risk: Medium

Works for

MoisturizingAntibacterialAnti-inflammatoryReduces irritationReduces rednessAnti-blemishAnti-aging

Traditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skin

More about Aloe barbadensis leaf juice

Aloe barbadensis extract~4.9–6%

Irritant · medium

Irritation risk: Medium

Works for

Moisturizing

Traditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skin

More about Aloe barbadensis extract

Water~4.9–6%

Formula

Irritation risk: Low

Plain old water

More about Water

Glycerin~3.4–4.1%

Key active

Irritation risk: Low

Works for

Moisturizing

One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant

More about Glycerin

Helianthus annuus seed oil~3–3.6%

Key active

Irritation risk: Low

Works for

Moisturizing

A great emollient due to its high linoleic acid content. One of the most effective plant oils in helping skin hydration and repairing skin barrier function

More about Helianthus annuus seed oil

Helianthus annuus extract~2.1–2.5%

Key active

Irritation risk: Low

Works for

Moisturizing

Helps soften the upper layer of the skin

More about Helianthus annuus extract

Niacinamide~1.7–2.1%

Hero · Moisturizing, Anti-blemish

Irritation risk: Low

Works for

Anti-agingEvens skin toneMoisturizingAnti-blemishReduces irritationAnti-inflammatoryReduces rednessAntibacterial

Is proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production

More about Niacinamide

Globularia cordifolia callus culture extract~1.4–1.8%

Formula

Irritation risk: Low

Works for

Anti-inflammatory

An extract from plant stem cells that might help calm down inflammation in skin

More about Globularia cordifolia callus culture extract

Glyceryl stearate~1.5–1.8%

Formula

Irritation risk: Low

Works for

CleansingMoisturizing

An emollient that softens the skin and forms a protective layer on its surface. Helps water and oil mix together

More about Glyceryl stearate

Cetyl

Not recognized

Sodium ascorbyl phosphate~1.2–1.5%

Under-dosedIrritant · medium

Irritation risk: Medium

Works for

Anti-blemishAnti-oxidationAnti-aging

A stable derivative of vitamin C. It is oil-soluble which means it is more likely to penetrate the skin compared to the pure form of vitamin C (which is water-soluble), but it is less bio-available and is way less effective in stimulating collagen and reducing wrinkles compared to the pure form of vitamin C (L-ascorbic acid) and its other derivatives (for example, magnesium ascorbyl phosphate). At the same time, this vitamin C derivative has been shown in studies to be effective in reducing acne, blemishes and clogged pores. It is less irritating then the pure form of vitamin C

More about Sodium ascorbyl phosphate

Ganoderma lucidum extract~1.1–1.3%

Key activeIrritant · medium

Irritation risk: Medium

Works for

Moisturizing

Helps attract water to the upper layer of the skin

More about Ganoderma lucidum extract

Persea gratissima oil~1.1–1.3%

Key activeIrritant · medium

Irritation risk: Medium

Works for

Moisturizing

An emollient that helps soften the skin and could be helpful in repairing its barrier function

More about Persea gratissima oil

Butyrospermum parkii butter~1–1.3%

Key activeComedogenic 3/5

Irritation risk: Low
Comedogenicity: 3/5

Works for

MoisturizingAnti-oxidationAnti-aging

A great moisturising ingredient that softens the skin and reduces water loss from its upper layer. It also can be helpful in protecting skin from free radicals

More about Butyrospermum parkii butter

Simmondsia chinensis seed oil~1–1.2%

Key activeIrritant · medium

Irritation risk: Medium

Works for

Moisturizing

Softens the upper layer of skin and helps restore the healthy skin barrier. Has shown to help calm down inflammation in skin. It is a stable oil, meaning that it retains its properties even when exposed to air.

More about Simmondsia chinensis seed oil

Daucus carota sativa seed oil~0.95–1.2%

Formula

Irritation risk: Low

Works for

Anti-oxidationAntibacterial

A plant oil that might help neutralize free radicals and have an anti-bacterial effect

More about Daucus carota sativa seed oil

Daucus carota sativa root extract~0.75–1.15%

Formula

Irritation risk: Low

Works for

Anti-oxidation

Carrot extract. Might have anti-oxidant properties and be used to add orange color

More about Daucus carota sativa root extract

Rubus idaeus extract~0.75–1.1%

Irritant · high

Irritation risk: High

Works for

Anti-oxidation

Mostly used as a fragrance. Might have some anti-oxidant effect

More about Rubus idaeus extract

Vitis vinifera seed oil~0.75–1.15%

Key activeIrritant · medium

Irritation risk: Medium

Works for

MoisturizingAnti-oxidation

A great emollient that can also have anti-oxidant properties

More about Vitis vinifera seed oil

Vitis vinifera seed~0.65–1%

Formula

Irritation risk: Low

More about Vitis vinifera seed

Tocopherol~0.65–0.95%

Under-dosed

Irritation risk: Low

Works for

Anti-oxidationAnti-agingAnti-inflammatoryMoisturizing

Pure form of vitamin E. Can help moisturise and protect the skin from free radicals. Often used to help stabilise other ingredients or the formula itself

More about Tocopherol

Panthenol~0.6–0.9%

Hero · Moisturizing

Irritation risk: Low

Works for

Reduces rednessMoisturizingReduces irritation

Helps attract water to the upper layer of the skin and can help improve skin barrier function

More about Panthenol

Caesalpinia spinosa gum~0.75–1.15%

Irritant · medium

Irritation risk: Medium

Works for

Moisturizing

More about Caesalpinia spinosa gum

Hyaluronic acid~0.6–0.9%

Key active

Irritation risk: Low

Works for

MoisturizingAnti-inflammatoryAnti-aging

One of the best moisturizing ingredients. Attracts water into the upper layer of the skin. Naturally present in skin. Typically has large molecule size unless advertised otherwise on the product label. Helps support skin's barrier function and may help to reduce inflammation

More about Hyaluronic acid

Glycolic acid~0.6–0.9%

Key activeIrritant · high

Irritation risk: High

Works for

Anti-agingExfoliationEvens skin toneAnti-blemish

An alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid

More about Glycolic acid

Palmitoyl tripeptide-5~0.6–0.9%

Hero · Moisturizing

Irritation risk: Low

Works for

MoisturizingAnti-aging

A type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles

More about Palmitoyl tripeptide-5

Centella asiatica extract~0.65–0.95%

Key activeIrritant · medium

Irritation risk: Medium

Works for

MoisturizingReduces irritationReduces rednessAnti-inflammatoryAnti-oxidationAnti-agingAnti-blemish

A plant extract that has been shown to be able to reduce inflammation in skin, support restoration of skin barrier function, as well as support collagen production. Contains active compounds called centelloids: asiaticoside, madecasosside, asiatic acid and madecassic acid. Might be helpful in preventing stretch marks. It can be itself be irritating though.

More about Centella asiatica extract

Glycyrrhiza glabra root extract~0.6–0.9%

Irritant · medium

Irritation risk: Medium

Works for

Reduces rednessEvens skin toneAnti-oxidationAnti-inflammatoryAntibacterial

A plant extract that can help lighten the skin and calm down inflammation. Might be helpful in neutralizing free radicals

More about Glycyrrhiza glabra root extract

Camellia sinensis leaf extract~0.6–0.9%

Key active

Irritation risk: Low

Works for

Anti-oxidationAntibacterialAnti-agingAnti-blemishEvens skin toneMoisturizing

Can contain potent anti-oxidant compounds (abbreviated ECG, GCG, EGC, and EGCG) that might help protect the skin from free radicals. Can help calm down inflammation and has some anti-bacterial properties. Unfortunately, these antioxidants are unstable and lose their effectiveness very quickly in products. The concentration of the antioxidant compounds in the extract also tends to be low to be effective in topical formulation

More about Camellia sinensis leaf extract

Camellia sinensis extract~0.6–0.85%

Key active

Irritation risk: Low

Works for

Anti-oxidation

Tea extract. Might be helpful in neutralizing free radicals in skin

More about Camellia sinensis extract

Styrax benzoin resin extract~0.7–1.05%

Formula

Irritation risk: Low

More about Styrax benzoin resin extract

Styrax tonkinensis resin extract~0.55–0.85%

Formula

Irritation risk: Low

More about Styrax tonkinensis resin extract

Astaxanthin~0.6–0.9%

Key activeIrritant · medium

Irritation risk: Medium

Works for

Anti-oxidationAnti-agingAnti-inflammatory

Helps neutralize free radicals in skin and might help to calm down inflammation

More about Astaxanthin

Haematococcus pluvialis extract~0.6–0.85%

Key activeIrritant · medium

Irritation risk: Medium

Works for

Anti-oxidation

Green algae extract that might contain antioxidant astaxanthin

More about Haematococcus pluvialis extract

Cochlearia armoracia root extract~0.6–0.9%

Irritant · high

Irritation risk: High

A plant root extract that has antimicrobial properties and can mask the smell of other ingredients

More about Cochlearia armoracia root extract

Foeniculum vulgare fruit extract~0.65–0.95%

Formula

Irritation risk: Low

More about Foeniculum vulgare fruit extract

Melissa officinalis flower/leaf/stem extract~0.55–0.85%

Irritant · high

Irritation risk: High

More about Melissa officinalis flower/leaf/stem extract

Citrus limon fruit extract~0.6–0.85%

Irritant · high

Irritation risk: High

Used as a fragrance. Can be irritating and cause photosensitivity

More about Citrus limon fruit extract

Panax quinquefolius root extract~0.55–0.85%

Formula

Irritation risk: Low

More about Panax quinquefolius root extract

Ginseng

Not recognized

Pimpinella anisum seed extract~0.5–0.75%

Formula

Irritation risk: Low

More about Pimpinella anisum seed extract

Salix alba bark extract~0.45–0.7%

Irritant · high

Irritation risk: High

Works for

Anti-inflammatoryAnti-oxidationAnti-blemishExfoliation

A plant extract that can help neutralize free radicals in skin. It contains a compound salicin that can theoretically be converted into salicylic acid that, in turn, helps reduce inflammation in skin, but the evidence of effectiveness in skin is lacking and the extract is usually not used in a concentration that would enable an exfoliating effect

More about Salix alba bark extract

Salix alba extract~0.5–0.75%

Formula

Irritation risk: Low

More about Salix alba extract

Schisandra chinensis fruit extract~0.5–0.7%

Irritant · medium

Irritation risk: Medium

Works for

Anti-oxidation

A berry extract that might help neutralize free radicals on the surface of the skin

More about Schisandra chinensis fruit extract

Citrus sinensis peel oil expressed~0.4–0.6%

Irritant · high

Irritation risk: High

More about Citrus sinensis peel oil expressed

Citrus aurantium dulcis seed oil~0.45–0.65%

Irritant · high

Irritation risk: High

More about Citrus aurantium dulcis seed oil

Citrus limon peel oil~0.3–0.6%

Irritant · high

Irritation risk: High

A highly irritating fragrance

More about Citrus limon peel oil

Xanthan gum~0.3–0.55%

Formula

Irritation risk: Low

Works for

Cleansing

Used to create a thicker product consistency

More about Xanthan gum

Dehydroacetic acid~0.3–0.55%

Irritant · medium

Irritation risk: Medium

A preservative

More about Dehydroacetic acid

Sodium dehydroacetate~0.3–0.55%

Irritant · medium

Irritation risk: Medium

A preservative

More about Sodium dehydroacetate

Ingredient list view

Aloe barbadensis leaf juice, Aloe barbadensis extract, Water, Glycerin, Helianthus annuus seed oil, Helianthus annuus extract, Niacinamide, Globularia cordifolia callus culture extract, Glyceryl stearate, Unknown, Sodium ascorbyl phosphate, Ganoderma lucidum extract, Persea gratissima oil, Butyrospermum parkii butter, Simmondsia chinensis seed oil, Daucus carota sativa seed oil, Daucus carota sativa root extract, Rubus idaeus extract, Vitis vinifera seed oil, Vitis vinifera seed, Tocopherol, Panthenol, Caesalpinia spinosa gum, Hyaluronic acid, Glycolic acid, Palmitoyl tripeptide-5, Centella asiatica extract, Glycyrrhiza glabra root extract, Camellia sinensis leaf extract, Camellia sinensis extract, Styrax benzoin resin extract, Styrax tonkinensis resin extract, Astaxanthin, Haematococcus pluvialis extract, Cochlearia armoracia root extract, Foeniculum vulgare fruit extract, Melissa officinalis flower/leaf/stem extract, Citrus limon fruit extract, Panax quinquefolius root extract, Unknown, Pimpinella anisum seed extract, Salix alba bark extract, Salix alba extract, Schisandra chinensis fruit extract, Citrus sinensis peel oil expressed, Citrus aurantium dulcis seed oil, Citrus limon peel oil, Xanthan gum, Dehydroacetic acid, Sodium dehydroacetate

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Worth comparing, line by line.

Match % combines shared ingredients, the first five ingredients, shared actives and hero ingredients, irritancy (lower counts in the alternative's favour), texture and body area. Only products in the same routine step are compared.

Side-by-side comparison of this product against its closest alternatives
	Kat RuduHydra Cell Bright Citrus MoisturizerYOUR PRODUCT	Alder New YorkLightweight Moisturizer	OlayFace Moisturizer	SUNGBOON EDITORAlaska Salmon PDRN Ultra Moisturizing Barrier Cream
Match	—	73%	72%	72%
Price	—	$34.99	$24.29	$19.99
Shared key ingredients	—	5 of 20	0 of 20	7 of 20
Key difference	—	3-Glyceryl Ascorbate	Avobenzone	Adenosine
Irritancy	High	Low	Low	Medium
SPF	—	—	SPF 30	—
Drying alcohol	—	—	—	—
	View product	Shop	Shop	Shop

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Product summary

Judging from the ingredient list, "Kat Rudu - Hydra Cell Bright Citrus Moisturizer" works well for improving skin hydration This moisturizer uses a good combo of humectants and emollients. These both types of ingredients are essentials for improving the skin hydration and keeping the skin barrier healthy. Humectants in this product (panthenol, glycerin, hyaluronic acid, aloe barbadensis extract and aloe barbadensis leaf juice) help to increase the water content in the upper layer of the skin. (These ingredients do so by "capturing" water molecules from the outside air or from within the deeper layers of the skin). Emollients in this formulation (helianthus annuus extract, persea gratissima oil, vitis vinifera seed oil, butyrospermum parkii butter and helianthus annuus seed oil) help to reduce the moisture loss from the skin. They also soften the skin surface and relieve the feeling of dryness and tightness.

Ingredient callouts

We love that this moisturizer contains a good concentration of niacinamide 1.70% - 2.10%. Niacinamide is a perfect active in a moistruizer because it helps calm down inflamation in skin and support the skin barrier. More than that, it is helpful for most common skin concerns: it helps regulat oil production, help reduce acne and clogged pores, improve skin tone and prevent pigmentation marks. It also helps fight photodamage.
We like that this moisturizer contains peptides (palmitoyl tripeptide-5 0.60% - 0.90%). There are many different kind of peptides and they are naturally present in our skin. They all are a combination of amino-acids. Some of them work as natural anti-biotics, promote wound-healing and production of collagen. The science is still not settled on how effective peptides in skincare are, but it is very likely that they have a benefit. Peptides might help restore the skin barrier and fight the signs of aging. At the very least, peptides work as humectants: they attract water to the upper layer of the skin and improve its hydration.
This formulation also uses an effective concentration of panthenol (pro-vitamin B5) - about 0.60% - 0.90%. Panthenol helps strengthen the skin barrier, improve hydration and reduce inflammation in skin.

Irritation risk

There are quite a few common irritants in this product, including ingredients without particular skin benefits. We would not recommend it for sensitive skin. We assess the overall irritancy of this moisturizer to be high. For a detailed overview of all potential irritants: click here

You can see the detailed formula review with the breakdown of all actives in the product and the full ingredient list with estimated concentrations in the tables below.

Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 42 studies and safety reviews.

1
Glycerol and the skin: holistic approach to its origin and functionsncbi.nlm.nih.gov
2
Effect of Olive and Sunflower Seed Oil on the Adult Skin Barrier: Implications for Neonatal Skin Careonlinelibrary.wiley.com
3
Topically Applied Sunflower Seed Oil Prevents Invasive Bacterial Infections in Preterm Infants in Egyptjournals.lww.com
4
Effect of topically applied lipids on surfactant-irritated skinonlinelibrary.wiley.com
5
Impact of topical oils on the skin barrier: possible implications for neonatal health in developing countriesonlinelibrary.wiley.com
6
Niacinamide - mechanisms of action and its topical use in dermatologyncbi.nlm.nih.gov
7
Gehring, W. (2004). Nicotinic acid/niacinamide and the skin. Journal of Cosmetic Dermatology, 3(2), 88–93. doi:10.1111/j.1473-2130.2004.00115.x ncbi.nlm.nih.gov
8
Sodium ascorbyl phosphate shows in vitro and in vivo efficacy in the prevention and treatment of acne vulgarisncbi.nlm.nih.gov
9
Sodium ascorbyl phosphate in topical microemulsionssciencedirect.com
10
Final report of the safety assessment of L-Ascorbic Acid, Calcium Ascorbate, Magnesium Ascorbate, Magnesium Ascorbyl Phosphate, Sodium Ascorbate, and Sodium Ascorbyl Phosphate as used in cosmeticseuropepmc.org
11
Regulation of collagen synthesis in human dermal fibroblasts by the sodium and magnesium salts of ascorbyl-2-phosphatekarger.com
12
Comparison of clinical efficacies of sodium ascorbyl phosphate, retinol and their combination in acne treatmentonlinelibrary.wiley.com
13
Application of l-ascorbic acid and its derivatives (sodium ascorbyl phosphate and magnesium ascorbyl phosphate) in topical cosmetic formulations: stability studiesinis.iaea.org
14
Sodium L-ascorbyl-2-phosphate 5% lotion for the treatment of acne vulgaris: a randomized, double-blind, controlled trialonlinelibrary.wiley.com
15
New Claims for Wild Carrot (Daucus carota subsp. carota) Essential Oilncbi.nlm.nih.gov
16
Vitamin E in dermatologyncbi.nlm.nih.gov
17
Vitamin E and Skin Healthlpi.oregonstate.edu
18
Skin moisturizing effects of panthenol-based formulationspdfs.semanticscholar.org
19
Safety Assessment of Panthenol, Pantothenic Acid, and Derivatives as Used in Cosmeticscir-safety.org
20
Final Report On the Safety Assessment of Galactomannans As Used in Cosmeticscir-safety.org
21
Efficacy of a New Topical Nano-hyaluronic Acid in Humansncbi.nlm.nih.gov
22
Physiochemical properties and application of hyaluronic acid: a systematic reviewonlinelibrary.wiley.com
23
Photoprotective and antiinflammatory effects of topical glycolic acidncbi.nlm.nih.gov
24
Glycolic acid peel therapy – a current reviewncbi.nlm.nih.gov
25
Dual Effects of Alpha-Hydroxy Acids on the Skinmdpi.com
26
Anti-Inflammatory Effect of Titrated Extract of Centella asiatica in Phthalic Anhydride-Induced Allergic Dermatitis Animal Modelmdpi.com
27
Centella asiatica in cosmetologyncbi.nlm.nih.gov
28
Triterpene Composition and Bioactivities of Centella asiatica mdpi.com
29
Asiaticoside induction for cell-cycle progression, proliferation and collagen synthesis in human dermal fibroblastsonlinelibrary.wiley.com
30
Assessment report on Centella asiatica (L.) Urban, herbaema.europa.eu
31
Contact dermatitis due to Madecassolonlinelibrary.wiley.com
32
The Effects of a Standardized Extract of Centella asiatica on Postlaser Resurfacing Wound Healing on the Face: A Split-Face, Double-Blind, Randomized, Placebo-Controlled Trialliebertpub.com
33
Astaxanthin, canthaxanthin and b-carotene differently affect UVA-induced oxidative damage and expression of oxidative stress-responsive enzymesonlinelibrary.wiley.com
34
Astaxanthin attenuates the UVA-induced up-regulation of matrixmetalloproteinase-1 and skin fibroblast elastase in human dermal fibroblastssciencedirect.com
35
Protective Effects of Topical Application of a Poorly Soluble Antioxidant Astaxanthin Liposomal Formulation on Ultraviolet-Induced Skin Damageonlinelibrary.wiley.com
36
Effective Inhibition of Skin Cancer, Tyrosinase, and Antioxidative Properties by Astaxanthin and Astaxanthin Esters from the Green Alga Haematococcus pluvialispubs.acs.org
37
Preliminary Clinical Evaluation of Toxicity and Efficacy of A New Astaxanthin-rich Haematococcus pluvialis Extractjstage.jst.go.jp
38
Astaxanthin in Skin Health, Repair, and Disease: A Comprehensive Reviewncbi.nlm.nih.gov
39
Safety Assessment of Citrus-Derived Peel Oils as Used in Cosmeticscir-safety.org
40
Efficacy and Safety of White Willow Bark (Salix alba) Extractonlinelibrary.wiley.com
41
An evaluation of the effect of a topical product containing salicin on the visible signs of human skin agingncbi.nlm.nih.gov
42
4 Final Report on the Safety Assessment of Sodium Dehydroacetate and Dehydroacetic Acidjournals.sagepub.com

Kat RuduHydra Cell Bright Citrus Moisturizer

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