Kate Ryan Skincare Vitamin C Daytime Repair Serum

Kate Ryan Skincare Vitamin C Daytime Repair Serum

Efficacy50/100IrritancyMedium

Works for

Moisturizing
Niacinamide, Lactobacillus/kelp ferment filtrate + 11 more
Works well
What the product description says
“Hydrate”
Source: N/A

This product contains good ingredients to attract water to the upper layer of the skin. These ingredients are called "humectants": carnosine, hyaluronic acid.

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. If the air is dry, humectants can speed up the moisture loss from the skin. This is why it is a good idea to use another product on top of this one to help "seal in" the moisture (look for ingredients like dimethicone, squalane, oils and butters).

The following ingredients in this product are especially good for supporting the skin barrier and helping with the hydration level: niacinamide

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~1.6–2%
Lactobacillus/kelp ferment filtrateKey activeEffect: High~4.3–5.2%
Sodium pcaKey active· HumectantEffect: HighNaturally present in skin and helps to attract water to its upper layer~3.3–4%
CarnitineKey activeEffect: Medium~2.4–3%
CarnosineKey active· HumectantEffect: HighA type of peptide. It attracts water to the upper layer of the skin. It can help neutralize free radicals in skin combatting the sun damage~2.2–2.7%
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~0.6–0.85%
GlutathioneKey activeEffect: HighA peptide that can help neutralize free radicals in skin and reduce melanin production resulting in skin lightening effect and reduction in hyperpigmentation. It can also help attract moisture to the upper layer of the skin~0.5–0.75%
UbiquinoneKey activeEffect: HighCoenzyme Q10. It helps neutralize free radicals in skin, improves skin hydration and might be helpful agains fine lines and wrinkles. It can be an allergen~0.45–0.7%
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.~0.45–0.7%
Superoxide dismutaseKey activeEffect: HighAn antioxidant enzyme that is naturally present in skin. It can help support skin barrier function and reduce inflammation in skin. It is used in topical medications for inflammatory skin conditions including atopic dermatitis (eczema) and psoriasis. There are three types of natural Superoxide Dismutase in human skin. The compound used in topical treatments and cosmetics are mimics of typically one of these natural variants~0.3–0.55%
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%
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~0.5–0.8%
Caprylyl glycol· Humectant, EmollientEffect: LowHelps preserve products and creates a nice product texture~0.15–0.3%
Exfoliation
No ingredient credited for this claim
Not delivered
What the product description says
“Exfoliate”
Source: N/A

This product does not contain effective exfoliating ingredients. It might be able to deliver physical exfoliation, that is scrub off some of the dead cells on the surface of the skin. We do not recommend physical exfoliation, because it is not uniform (some bits of skin can get exfoliated too much while others not at all). It can also traumatize the skin and aggrevate acne and other skin conditions.

Evens skin tone
Not advertised by the brand · Tetrahexyldecyl ascorbate, Niacinamide + 9 more
Works well

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

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: ferulic acid, phloretin, resveratrol, tetrahydrobisdemethoxydiferuloylmethane, tetrahydrodemethoxydiferuloylmethane, tetrahydrodiferuloylmethane.

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.

Tetrahexyldecyl ascorbateKey activeEffect: HighBeing a lipid soluble form of vitamin C, it is more stable than ascorbic acid, but still degrades quickly and needs to be stabilized in a formulation with another ingredient. It is claimed to penetrate skin better than pure vitamin C and have the the similar benefits, but solid studies of its effectiveness are lacking. Is likely to require a higher concentration in a product than pure vitamin C to be effective. It might be able to help reduce pore clogging.~8.1–9.9%
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~1.6–2%
PhloretinKey activeEffect: MediumA potent antioxidant that is able to penetrate the skin barrier. It can help neutralize free radicals in skin, fight photodamage and reduce hyperpigmentation. It is, however, unstable and loses effectiveness when exposed to light. Effective products with phloretin must come in air-tight opaque packaging and use a sophisticated delivery technology~0.6–0.85%
GlutathioneKey activeEffect: HighA peptide that can help neutralize free radicals in skin and reduce melanin production resulting in skin lightening effect and reduction in hyperpigmentation. It can also help attract moisture to the upper layer of the skin~0.5–0.75%
Ferulic acidKey activeEffect: MediumA potent anti-oxidant that has been shown to be effective in neutralizing free radicals in skin. There seem to have a synergetic effect of ferulic acid, vitamin E and C, meaning that when the ingredients are used together, they enhance each other's ability protect the skin against free radicals. Ferulic acid also helps to stabilize other ingredients - including vitamins C and E. It can help to even out the skin tone. Ferulic acid is approved for use as a sunscreen ingredient in Japan in concentrations up to 10%~0.45–0.65%
TetrahydrodiferuloylmethaneEffect: LowAn anti-oxidant derived from curcumin (naturally present in tumeric). Is a part of the tetrahydrocurcuminoids complex (THC). The complex might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritating~1.3–1.6%
TetrahydrodemethoxydiferuloylmethaneEffect: LowAn anti-oxidant derived from curcumin (naturally present in tumeric). Is a part of the tetrahydrocurcuminoids complex (THC). The complex might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritating~1.1–1.4%
TetrahydrobisdemethoxydiferuloylmethaneEffect: LowAn anti-oxidant derived from curcumin (naturally present in tumeric). It might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritating~0.9–1.1%
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%
ResveratrolEffect: LowHelps neutralize free radicals in skin and might help reduce fine lines and wrinkles, as well as even out the skin tone~0.45–0.7%
Magnesium ascorbyl phosphateEffect: Low, below effective doseA derivative of vitamin C that is more stable, but less bioavailable than the pure form of vitamin C. It does not penetrate the skin well, but has been shown to convert to pure vitamin C once in skin. It can be helpful in stimulating collagen production and lightening the skin tone, but the required concentration is likely to be very high~2.6–3.1%
Anti-oxidation
Not advertised by the brand · Tetrahexyldecyl ascorbate, Carnosine + 16 more
Works well

This product contains antioxidants (carnosine, ferulic acid, glutathione, lycopene, phloretin, resveratrol, superoxide dismutase, tetrahexyldecyl ascorbate, thioctic acid, ubiquinone) 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 leaf extract, centella asiatica extract, tetrahydrobisdemethoxydiferuloylmethane, tetrahydrodemethoxydiferuloylmethane, tetrahydrodiferuloylmethane also can have an antioxidant effect, but there is less evidence to confirm their effectiveness in skin.

Tetrahexyldecyl ascorbateKey activeEffect: HighBeing a lipid soluble form of vitamin C, it is more stable than ascorbic acid, but still degrades quickly and needs to be stabilized in a formulation with another ingredient. It is claimed to penetrate skin better than pure vitamin C and have the the similar benefits, but solid studies of its effectiveness are lacking. Is likely to require a higher concentration in a product than pure vitamin C to be effective. It might be able to help reduce pore clogging.~8.1–9.9%
CarnosineKey activeEffect: HighA type of peptide. It attracts water to the upper layer of the skin. It can help neutralize free radicals in skin combatting the sun damage~2.2–2.7%
TetrahydrodiferuloylmethaneKey activeEffect: MediumAn anti-oxidant derived from curcumin (naturally present in tumeric). Is a part of the tetrahydrocurcuminoids complex (THC). The complex might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritating~1.3–1.6%
TetrahydrodemethoxydiferuloylmethaneKey activeEffect: MediumAn anti-oxidant derived from curcumin (naturally present in tumeric). Is a part of the tetrahydrocurcuminoids complex (THC). The complex might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritating~1.1–1.4%
TetrahydrobisdemethoxydiferuloylmethaneKey activeEffect: MediumAn anti-oxidant derived from curcumin (naturally present in tumeric). It might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritating~0.9–1.1%
PhloretinKey activeEffect: HighA potent antioxidant that is able to penetrate the skin barrier. It can help neutralize free radicals in skin, fight photodamage and reduce hyperpigmentation. It is, however, unstable and loses effectiveness when exposed to light. Effective products with phloretin must come in air-tight opaque packaging and use a sophisticated delivery technology~0.6–0.85%
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%
GlutathioneKey activeEffect: HighA peptide that can help neutralize free radicals in skin and reduce melanin production resulting in skin lightening effect and reduction in hyperpigmentation. It can also help attract moisture to the upper layer of the skin~0.5–0.75%
Ferulic acidKey activeEffect: HighA potent anti-oxidant that has been shown to be effective in neutralizing free radicals in skin. There seem to have a synergetic effect of ferulic acid, vitamin E and C, meaning that when the ingredients are used together, they enhance each other's ability protect the skin against free radicals. Ferulic acid also helps to stabilize other ingredients - including vitamins C and E. It can help to even out the skin tone. Ferulic acid is approved for use as a sunscreen ingredient in Japan in concentrations up to 10%~0.45–0.65%
ResveratrolKey activeEffect: HighHelps neutralize free radicals in skin and might help reduce fine lines and wrinkles, as well as even out the skin tone~0.45–0.7%
UbiquinoneKey activeEffect: HighCoenzyme Q10. It helps neutralize free radicals in skin, improves skin hydration and might be helpful agains fine lines and wrinkles. It can be an allergen~0.45–0.7%
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.~0.45–0.7%
LycopeneKey activeEffect: HighHelps neutralize free radicals in skin combating sun damage. Adds a red color to the product~0.3–0.6%
Superoxide dismutaseKey activeEffect: HighAn antioxidant enzyme that is naturally present in skin. It can help support skin barrier function and reduce inflammation in skin. It is used in topical medications for inflammatory skin conditions including atopic dermatitis (eczema) and psoriasis. There are three types of natural Superoxide Dismutase in human skin. The compound used in topical treatments and cosmetics are mimics of typically one of these natural variants~0.3–0.55%
Thioctic acidKey activeEffect: High~0.3–0.6%
Hesperidin methyl chalconeEffect: LowMight help neutralize free radicals in skin. Is claimed to be able to improve the appearance of undereye darkness but evidence is missing. Can be an allergen and cause irritation~0.65–0.95%
Magnesium ascorbyl phosphateEffect: Low, below effective doseA derivative of vitamin C that is more stable, but less bioavailable than the pure form of vitamin C. It does not penetrate the skin well, but has been shown to convert to pure vitamin C once in skin. It can be helpful in stimulating collagen production and lightening the skin tone, but the required concentration is likely to be very high~2.6–3.1%
Ascorbyl palmitateEffect: Low, below effective doseBeing a lipid soluble form of vitamin C, it is more stable and can penetrate the skin better than L-Ascorbic acid. It is effective in protecting the skin from free radicals, as well as evening the skin tone, but is less effective in stimulating collagen production compared to L-Ascorbic acid.~0.6–0.9%
Anti-aging
Side benefit the brand mentions · Tetrahexyldecyl ascorbate, Carnosine + 14 more
Works well
What the product description says
“Fine Lines and Wrinkles Loss of Firmness/Sagging Large Pores, Clogged Pores Sun Damage/Discoloration Hydrate Brightening (Restore Radiance) Exfoliate Dark Circles, Crows Feet”
Source: N/A

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

These ingredients in the product can also be helpful, even though there is less evidence for their effectiveness: carnosine, centella asiatica extract, ferulic acid, phloretin, resveratrol.

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.

Tetrahexyldecyl ascorbateKey activeEffect: HighBeing a lipid soluble form of vitamin C, it is more stable than ascorbic acid, but still degrades quickly and needs to be stabilized in a formulation with another ingredient. It is claimed to penetrate skin better than pure vitamin C and have the the similar benefits, but solid studies of its effectiveness are lacking. Is likely to require a higher concentration in a product than pure vitamin C to be effective. It might be able to help reduce pore clogging.~8.1–9.9%
CarnosineKey activeEffect: MediumA type of peptide. It attracts water to the upper layer of the skin. It can help neutralize free radicals in skin combatting the sun damage~2.2–2.7%
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~1.6–2%
PhloretinKey activeEffect: MediumA potent antioxidant that is able to penetrate the skin barrier. It can help neutralize free radicals in skin, fight photodamage and reduce hyperpigmentation. It is, however, unstable and loses effectiveness when exposed to light. Effective products with phloretin must come in air-tight opaque packaging and use a sophisticated delivery technology~0.6–0.85%
ResveratrolKey activeEffect: MediumHelps neutralize free radicals in skin and might help reduce fine lines and wrinkles, as well as even out the skin tone~0.45–0.7%
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.~0.45–0.7%
Ferulic acidKey activeEffect: MediumA potent anti-oxidant that has been shown to be effective in neutralizing free radicals in skin. There seem to have a synergetic effect of ferulic acid, vitamin E and C, meaning that when the ingredients are used together, they enhance each other's ability protect the skin against free radicals. Ferulic acid also helps to stabilize other ingredients - including vitamins C and E. It can help to even out the skin tone. Ferulic acid is approved for use as a sunscreen ingredient in Japan in concentrations up to 10%~0.45–0.65%
TetrahydrodiferuloylmethaneEffect: LowAn anti-oxidant derived from curcumin (naturally present in tumeric). Is a part of the tetrahydrocurcuminoids complex (THC). The complex might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritating~1.3–1.6%
TetrahydrodemethoxydiferuloylmethaneEffect: LowAn anti-oxidant derived from curcumin (naturally present in tumeric). Is a part of the tetrahydrocurcuminoids complex (THC). The complex might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritating~1.1–1.4%
TetrahydrobisdemethoxydiferuloylmethaneEffect: LowAn anti-oxidant derived from curcumin (naturally present in tumeric). It might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritating~0.9–1.1%
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%
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~0.6–0.85%
UbiquinoneEffect: LowCoenzyme Q10. It helps neutralize free radicals in skin, improves skin hydration and might be helpful agains fine lines and wrinkles. It can be an allergen~0.45–0.7%
Thioctic acidEffect: Low~0.3–0.6%
Magnesium ascorbyl phosphateEffect: Low, below effective doseA derivative of vitamin C that is more stable, but less bioavailable than the pure form of vitamin C. It does not penetrate the skin well, but has been shown to convert to pure vitamin C once in skin. It can be helpful in stimulating collagen production and lightening the skin tone, but the required concentration is likely to be very high~2.6–3.1%
Ascorbyl palmitateEffect: Low, below effective doseBeing a lipid soluble form of vitamin C, it is more stable and can penetrate the skin better than L-Ascorbic acid. It is effective in protecting the skin from free radicals, as well as evening the skin tone, but is less effective in stimulating collagen production compared to L-Ascorbic acid.~0.6–0.9%
Anti-blemish
Not advertised by the brand · Niacinamide, Carnitine + 2 more
Works well

This product can help reduce breakouts and clogged pores because it contains the following ingredient: niacinamide. This ingredient is used for treating acne and can have a noticeable effect.

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~1.6–2%
CarnitineEffect: Low~2.4–3%
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%
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.~0.45–0.7%

Can it cause trouble?

Irritancy
16 flagged ingredients
Medium risk
We flagged 16 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
TetrahydrodiferuloylmethaneAn anti-oxidant derived from curcumin (naturally present in tumeric). Is a part of the tetrahydrocurcuminoids complex (THC). The complex might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritatingHigh~1.3–1.6%est.
TetrahydrodemethoxydiferuloylmethaneAn anti-oxidant derived from curcumin (naturally present in tumeric). Is a part of the tetrahydrocurcuminoids complex (THC). The complex might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritatingHigh~1.1–1.4%est.
TetrahydrobisdemethoxydiferuloylmethaneAn anti-oxidant derived from curcumin (naturally present in tumeric). It might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritatingHigh~0.9–1.1%est.
Hesperidin methyl chalconeMight help neutralize free radicals in skin. Is claimed to be able to improve the appearance of undereye darkness but evidence is missing. Can be an allergen and cause irritationHigh~0.65–0.95%est.
Tetrahexyldecyl ascorbateBeing a lipid soluble form of vitamin C, it is more stable than ascorbic acid, but still degrades quickly and needs to be stabilized in a formulation with another ingredient. It is claimed to penetrate skin better than pure vitamin C and have the the similar benefits, but solid studies of its effectiveness are lacking. Is likely to require a higher concentration in a product than pure vitamin C to be effective. It might be able to help reduce pore clogging.Medium~8.1–9.9%est.
Magnesium ascorbyl phosphateA derivative of vitamin C that is more stable, but less bioavailable than the pure form of vitamin C. It does not penetrate the skin well, but has been shown to convert to pure vitamin C once in skin. It can be helpful in stimulating collagen production and lightening the skin tone, but the required concentration is likely to be very highMedium~2.6–3.1%est.
Ascorbyl palmitateBeing a lipid soluble form of vitamin C, it is more stable and can penetrate the skin better than L-Ascorbic acid. It is effective in protecting the skin from free radicals, as well as evening the skin tone, but is less effective in stimulating collagen production compared to L-Ascorbic acid.Medium~0.6–0.9%est.
PhloretinA potent antioxidant that is able to penetrate the skin barrier. It can help neutralize free radicals in skin, fight photodamage and reduce hyperpigmentation. It is, however, unstable and loses effectiveness when exposed to light. Effective products with phloretin must come in air-tight opaque packaging and use a sophisticated delivery technologyMedium~0.6–0.85%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~0.5–0.8%est.
GlutathioneA peptide that can help neutralize free radicals in skin and reduce melanin production resulting in skin lightening effect and reduction in hyperpigmentation. It can also help attract moisture to the upper layer of the skinMedium~0.5–0.75%est.
ResveratrolHelps neutralize free radicals in skin and might help reduce fine lines and wrinkles, as well as even out the skin toneMedium~0.45–0.7%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~0.45–0.7%est.
LycopeneHelps neutralize free radicals in skin combating sun damage. Adds a red color to the productMedium~0.3–0.6%est.
Citric acidCan work as an exfoliant but is typically used to adjust the product pHMedium~0.15–0.25%est.
Caprylyl glycolHelps preserve products and creates a nice product textureMedium~0.15–0.3%est.
Sorbic acidA preservativeMedium~0.1–0.2%est.
Comedogenic
Clean of flagged comedogenic ingredients
None flagged

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Ingredients

Filter by role to see what each ingredient is doing.

Water~45–55%
Formula
Irritation risk
Low

Plain old water

More about Water
Tetrahexyldecyl ascorbate~8.1–9.9%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Evens skin toneAnti-agingAnti-oxidation

Being a lipid soluble form of vitamin C, it is more stable than ascorbic acid, but still degrades quickly and needs to be stabilized in a formulation with another ingredient. It is claimed to penetrate skin better than pure vitamin C and have the the similar benefits, but solid studies of its effectiveness are lacking. Is likely to require a higher concentration in a product than pure vitamin C to be effective. It might be able to help reduce pore clogging.

More about Tetrahexyldecyl ascorbate
Lactobacillus/kelp ferment filtrate~4.3–5.2%
Key active
Irritation risk
Low
Works for
Moisturizing
More about Lactobacillus/kelp ferment filtrate
Sodium pca~3.3–4%
Key active
Irritation risk
Low
Works for
Moisturizing

Naturally present in skin and helps to attract water to its upper layer

More about Sodium pca
Magnesium ascorbyl phosphate~2.6–3.1%
Irritant · medium
Irritation risk
Medium
Works for
Evens skin toneAnti-agingAnti-oxidation

A derivative of vitamin C that is more stable, but less bioavailable than the pure form of vitamin C. It does not penetrate the skin well, but has been shown to convert to pure vitamin C once in skin. It can be helpful in stimulating collagen production and lightening the skin tone, but the required concentration is likely to be very high

More about Magnesium ascorbyl phosphate
Carnosine~2.2–2.7%
Key active
Irritation risk
Low
Works for
Anti-oxidationMoisturizingAnti-aging

A type of peptide. It attracts water to the upper layer of the skin. It can help neutralize free radicals in skin combatting the sun damage

More about Carnosine
Carnitine~2.4–3%
Key active
Irritation risk
Low
Works for
CleansingMattifyingMoisturizingAnti-blemish
More about Carnitine
Niacinamide~1.6–2%
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
Tetrahydrodiferuloylmethane~1.3–1.6%
Key activeIrritant · high
Irritation risk
High
Works for
Anti-oxidationEvens skin toneAnti-aging

An anti-oxidant derived from curcumin (naturally present in tumeric). Is a part of the tetrahydrocurcuminoids complex (THC). The complex might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritating

More about Tetrahydrodiferuloylmethane
Tetrahydrodemethoxydiferuloylmethane~1.1–1.4%
Key activeIrritant · high
Irritation risk
High
Works for
Anti-oxidationEvens skin toneAnti-aging

An anti-oxidant derived from curcumin (naturally present in tumeric). Is a part of the tetrahydrocurcuminoids complex (THC). The complex might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritating

More about Tetrahydrodemethoxydiferuloylmethane
Tetrahydrobisdemethoxydiferuloylmethane~0.9–1.1%
Key activeIrritant · high
Irritation risk
High
Works for
Anti-oxidationEvens skin toneAnti-aging

An anti-oxidant derived from curcumin (naturally present in tumeric). It might be helpful in neutralizing free radicals in skin and possibly help even out the skin tone. Can be irritating

More about Tetrahydrobisdemethoxydiferuloylmethane
Ferulic acid~0.7–1.05%
Key active
Irritation risk
Low
Works for
Anti-oxidationEvens skin toneAnti-inflammatoryAnti-aging

A potent anti-oxidant that has been shown to be effective in neutralizing free radicals in skin. There seem to have a synergetic effect of ferulic acid, vitamin E and C, meaning that when the ingredients are used together, they enhance each other's ability protect the skin against free radicals. Ferulic acid also helps to stabilize other ingredients - including vitamins C and E. It can help to even out the skin tone. Ferulic acid is approved for use as a sunscreen ingredient in Japan in concentrations up to 10%

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Hesperidin methyl chalcone~0.65–0.95%
Irritant · high
Irritation risk
High
Works for
Anti-oxidation

Might help neutralize free radicals in skin. Is claimed to be able to improve the appearance of undereye darkness but evidence is missing. Can be an allergen and cause irritation

More about Hesperidin methyl chalcone
Ascorbyl palmitate~0.6–0.9%
Irritant · medium
Irritation risk
Medium
Works for
Anti-oxidationAnti-aging

Being a lipid soluble form of vitamin C, it is more stable and can penetrate the skin better than L-Ascorbic acid. It is effective in protecting the skin from free radicals, as well as evening the skin tone, but is less effective in stimulating collagen production compared to L-Ascorbic acid.

More about Ascorbyl palmitate
Hyaluronic acid~0.6–0.85%
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

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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

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Phloretin~0.6–0.85%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Anti-oxidationEvens skin toneAnti-aging

A potent antioxidant that is able to penetrate the skin barrier. It can help neutralize free radicals in skin, fight photodamage and reduce hyperpigmentation. It is, however, unstable and loses effectiveness when exposed to light. Effective products with phloretin must come in air-tight opaque packaging and use a sophisticated delivery technology

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Aloe barbadensis extract~0.5–0.8%
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
Glutathione~0.5–0.75%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Evens skin toneMoisturizingAnti-oxidation

A peptide that can help neutralize free radicals in skin and reduce melanin production resulting in skin lightening effect and reduction in hyperpigmentation. It can also help attract moisture to the upper layer of the skin

More about Glutathione
Dimethylaminoethanol bitartrate
Not recognized
Ubiquinone~0.45–0.7%
Key active
Irritation risk
Low
Works for
Anti-oxidationMoisturizingAnti-aging

Coenzyme Q10. It helps neutralize free radicals in skin, improves skin hydration and might be helpful agains fine lines and wrinkles. It can be an allergen

More about Ubiquinone
Resveratrol~0.45–0.7%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Anti-oxidationAnti-agingEvens skin tone

Helps neutralize free radicals in skin and might help reduce fine lines and wrinkles, as well as even out the skin tone

More about Resveratrol
Ferulic acid~0.45–0.65%
Key active
Irritation risk
Low
Works for
Anti-oxidationEvens skin toneAnti-inflammatoryAnti-aging

A potent anti-oxidant that has been shown to be effective in neutralizing free radicals in skin. There seem to have a synergetic effect of ferulic acid, vitamin E and C, meaning that when the ingredients are used together, they enhance each other's ability protect the skin against free radicals. Ferulic acid also helps to stabilize other ingredients - including vitamins C and E. It can help to even out the skin tone. Ferulic acid is approved for use as a sunscreen ingredient in Japan in concentrations up to 10%

More about Ferulic acid
Centella asiatica extract~0.45–0.7%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Reduces irritationReduces rednessMoisturizingAnti-inflammatoryAnti-agingAnti-oxidationAnti-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
Lycopene~0.3–0.6%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Anti-oxidation

Helps neutralize free radicals in skin combating sun damage. Adds a red color to the product

More about Lycopene
Thioctic acid~0.3–0.6%
Key active
Irritation risk
Low
Works for
Anti-oxidationAnti-aging
More about Thioctic acid
Superoxide dismutase~0.3–0.55%
Key active
Irritation risk
Low
Works for
Anti-oxidationMoisturizingAnti-inflammatory

An antioxidant enzyme that is naturally present in skin. It can help support skin barrier function and reduce inflammation in skin. It is used in topical medications for inflammatory skin conditions including atopic dermatitis (eczema) and psoriasis. There are three types of natural Superoxide Dismutase in human skin. The compound used in topical treatments and cosmetics are mimics of typically one of these natural variants

More about Superoxide dismutase
Catalase~0.2–0.4%
Formula
Irritation risk
Low
More about Catalase
Sh-oligopeptide-77~0.2–0.35%
Formula
Citric acid~0.15–0.25%
Irritant · medium
Irritation risk
Medium

Can work as an exfoliant but is typically used to adjust the product pH

More about Citric acid
Caprylyl glycol~0.15–0.3%
Irritant · medium
Irritation risk
Medium
Works for
Moisturizing

Helps preserve products and creates a nice product texture

More about Caprylyl glycol
Phenoxyethanol~0.15–0.25%
Formula
Irritation risk
Low

A preservative. It helps prevent bacterial growth in cosmetic products

More about Phenoxyethanol
Sorbic acid~0.1–0.2%
Irritant · medium
Irritation risk
Medium

A preservative

More about Sorbic acid
Ingredient list view

Water, Tetrahexyldecyl ascorbate, Lactobacillus/kelp ferment filtrate, Sodium pca, Magnesium ascorbyl phosphate, Carnosine, Carnitine, Niacinamide, Tetrahydrodiferuloylmethane, Tetrahydrodemethoxydiferuloylmethane, Tetrahydrobisdemethoxydiferuloylmethane, Ferulic acid, Hesperidin methyl chalcone, Ascorbyl palmitate, Hyaluronic acid, Camellia sinensis leaf extract, Phloretin, Aloe barbadensis extract, Glutathione, Unknown, Ubiquinone, Resveratrol, Ferulic acid, Centella asiatica extract, Lycopene, Thioctic acid, Superoxide dismutase, Catalase, Sh-oligopeptide-77, Citric acid, Caprylyl glycol, Phenoxyethanol, Sorbic acid

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Side-by-side comparison of this product against its closest alternatives
Kate Ryan SkincareVitamin C Daytime Repair SerumYOUR PRODUCTSkin Actives ScientificAntioxidant SerumINNBEAUTY PROJECTPro C SerumskinmadeHyaluronic Acid + Vitamin C serum
Match—87%79%79%
Price——$64.00$24.37
Shared key ingredients—13 of 204 of 205 of 20
Key difference—Epigallocatechin GallateVitamin CAdenosine
Irritancy Medium Medium Medium Low
Drying alcohol————
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Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 44 studies and safety reviews.

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Kate Ryan Skincare Vitamin C Daytime Repair Serum
Kate Ryan SkincareVitamin C Daytime Repair Serum

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