What's In My Jar
K-SECRET Collagen Boosting Secret Day Cream
K-SECRET

K-SECRET Collagen Boosting Secret Day Cream

SPF 50Efficacy90/100IrritancyMedium·4 UV filters
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Works for

4 of 4 advertised claims delivered

Sun protection
SPF 50 · 4 UV filters
Broad spectrum
SPF 50Broad spectrumChemical filtersNo white cast

This product offers a good level of protection against both UVB and UVA rays.

This sunscreen uses organic (so-called "chemical") sunscreen filters. Organic, or "chemical" filters usually provide reliable sun protection and rarely leave a white cast. Sunscreens with organic filters can sting eyes.

This product can be considered "reef safe" because it does not contain the UV filters (oxybenzone and octinoxate) that can be harmful to coral reefs when present in the water in high concentrations.

UV spectrum
UVB290–320 nmUVA II320–340 nmUVA I340–400 nm
Amiloxate
Tinosorb S
Uvinul A Plus
Terephthalylidene Dicamphor Sulfonic Acid
FilterCoverageWhat it doesEst. amount
AmiloxateIsoamyl P-methoxycinnamateUVBUVA2Amiloxate or Neo Heliopan E1000. A UV filter. It is effective against UVB and UVA II rays. Not available in the US. It can be irritating~3.7–5.6%
Tinosorb SBis-ethylhexyloxyphenol Methoxyphenyl TriazineUVBUVA Photo-stable Tinosorb S. One of the most effective broad spectrum sunscreen ingredients. Protects from both UVA and UVB rays. It is photostable. Unfortunately, not approved by FDA (US) yet.~2.2–3.3%
Uvinul A PlusDiethylamino Hydroxybenzoyl Hexyl BenzoateUVA1 Photo-stable Uvinul A Plus. A new generation broad spectrum sunscreen that offers an effective protection especially in the UVA range. It is stable in formulations. Unfortunately, is not approved by the FDA (US) yet~2.8–4.1%
Terephthalylidene Dicamphor Sulfonic AcidUVA1 Photo-stable Ecamsule, Mexoryl SX. A UV filter. Is effective mostly against the UVA rays. It is legally marketed in the US with the FDA approval since 2006, even though the ingredient is not on the official FDA list of the approved sunscreen active ingredients. It is photostable~1.8–2.8%
~ marks concentrations estimated from label position and typical use levels
Reef-safe
No oxybenzone or octinoxate — the two filters banned in Hawaii, Florida Keys and Aruba.
Evens skin tone
Niacinamide, Glutathione + 2 more
Strong evidence
What the product description says
“All-in-one product that helps protect the skin from powerful UV rays with SPF50+ PA++++ while reducing wrinkles and pigmentation.”
Source: Yesstyle

This product offers broad spectrum sun protection. It means that it can prevent hyperpigmentation and help keep the skin tone even (sun damage is the main factor causing age spots, darkening of post-acne marks and other discolorations).

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~1–1.5%
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~0.15–0.65%
Ascorbyl glucosideUnder-dosedEffect: MediumA vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in products~0.15–0.55%
Dipotassium glycyrrhizateEffect: Low, below effective doseA salt derived from licorice. Works as an emollient to soften the upper layer of the skin and can help calm down inflammation. Might be helpful for skin lightening~0.3–0.7%
Anti-aging
Adenosine, Niacinamide + 6 more
Strong evidence
What the product description says
“All-in-one product that helps protect the skin from powerful UV rays with SPF50+ PA++++ while reducing wrinkles and pigmentation.”
Source: Yesstyle

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

These ingredients in the product can also be helpful, even though there is less evidence for their effectiveness: acetyl hexapeptide-8, copper tripeptide-1, oligopeptide-1, palmitoyl pentapeptide-4.

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.

This product can also help prevent early signs of skin aging because it offers a good level of broad spectrum sun protection. Sun damage is the main cause of premature skin aging, and protecting your skin from the sun is the best anti-aging strategy.

AdenosineKey activeEffect: HighMight help improve cell turnover and reduce inflammation in skin. One study shows that the ingredients might be able to help reduce dynamic wrinkles (for example, in the corners of the eyes or on the forehead)~0.35–0.85%
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~1–1.5%
Acetyl hexapeptide-8Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.1–0.45%
Oligopeptide-1Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.1–0.3%
Palmitoyl pentapeptide-4Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.1–0.3%
Copper tripeptide-1Key activeEffect: MediumA naturally occurring peptide. One of the most studied peptides in dermatology. It is sometimes abbreviated GHK-Cu. Belongs to the class of carrier peptides. It stimulates both synthesis and breakdown of collagen in skin. It is released in skin wounds and inflammation to support healing. It accelerates wound-healing of the skin and can stimulate hair growth. There are preliminary studies that confirm that copper tripeptide can help support collagen production reducing fine lines and wrinkles and decrease inflammation in skin.~0.1–0.4%
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~0.35–0.8%
Ascorbyl glucosideUnder-dosedEffect: MediumA vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in products~0.15–0.55%
Moisturizing
Niacinamide, Oligopeptide-1 + 24 more
Strong evidence
What the product description says
“Collagen Boosting Secret Day Cream”
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: hydrolyzed collagen, c12-15 alkyl benzoate.

The following ingredients in this product are especially good for supporting the skin barrier and helping with the hydration level: acetyl hexapeptide-8, copper tripeptide-1, niacinamide, oligopeptide-1, palmitoyl pentapeptide-4

Soluble collagenKey active· HumectantEffect: HighA typically plant-derived compound that is supposed mimic human collagen. Cannot penetrate the skin barrier so is not particularly useful in skincare products beyond attracting water to the upper layer of the skin~0.2–0.8%
Hydrolyzed sodium hyaluronateKey activeEffect: HighAttracts water into the upper layer of the skin~0.35–0.85%
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~1–1.5%
Oligopeptide-1HeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.1–0.3%
Palmitoyl pentapeptide-4HeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.1–0.3%
Sodium hyaluronateKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin~0.35–0.75%
Sodium hyaluronate crosspolymerKey active· HumectantEffect: HighAttracts water into the upper layer of the skin~0.35–0.75%
Acetyl hexapeptide-8Hero· HumectantEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.1–0.45%
Copper tripeptide-1HeroEffect: HighA naturally occurring peptide. One of the most studied peptides in dermatology. It is sometimes abbreviated GHK-Cu. Belongs to the class of carrier peptides. It stimulates both synthesis and breakdown of collagen in skin. It is released in skin wounds and inflammation to support healing. It accelerates wound-healing of the skin and can stimulate hair growth. There are preliminary studies that confirm that copper tripeptide can help support collagen production reducing fine lines and wrinkles and decrease inflammation in skin.~0.1–0.4%
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~0.15–0.65%
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~0.2–0.75%
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~0.35–0.8%
Hydrolyzed collagenKey active· Humectant, EmollientEffect: HighA typically plant-derived compound that is supposed mimic human collagen. Cannot penetrate the skin barrier so is not particularly useful in skincare products beyond attracting water to the upper layer of the skin~22–33%
Hydrolyzed glycosaminoglycansKey active· HumectantEffect: HighLong sugars that help attract water to the upper layer of the skin~0.15–0.65%
Hydrolyzed hyaluronic acidKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin. A version of it is naturally present in skin~0.35–0.8%
Sodium acetylated hyaluronateKey active· HumectantEffect: HighA type of hyaluronic acid that works as an excellent moisturizer by attracting water into the upper layer of the skin. Is typically feels less sticky on the skin compared to the usual hyaluronic acid~0.15–0.65%
Polyglyceryl-6 stearateKey active· EmollientEffect: MediumHelps soften the upper layer of the skin~0.8–1.2%
AdenosineKey activeEffect: MediumMight help improve cell turnover and reduce inflammation in skin. One study shows that the ingredients might be able to help reduce dynamic wrinkles (for example, in the corners of the eyes or on the forehead)~0.35–0.85%
Cetearyl alcoholKey active· EmollientEffect: MediumA non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture~0.85–1.25%
C12-15 alkyl benzoateKey active· EmollientEffect: MediumEnhances the product texture and makes it more spreadable. Helps reduce water loss from the outer layer of skin. Extands the shelf life by preventing bacteria growth~1.3–1.9%
BiotinEffect: LowMight have some moisturising properties. Is not effective when applied topically beyond some moisturizing effect~0.15–0.65%
Caprylyl glycol· Humectant, EmollientEffect: LowHelps preserve products and creates a nice product texture~0.4–0.95%
Propylene glycol dicaprylate· EmollientEffect: LowHelps soften the upper layer of the skin and create a nice product texture~0.9–1.35%
Hydrogenated palm glycerides· EmollientEffect: LowAn emollient that softens the skin~0.55–1.25%
Dibutyl adipate· EmollientEffect: LowHelps soften the upper layer of the skin and create a nice product consistency~4.8–7.1%
Dipotassium glycyrrhizateUnder-dosedEffect: HighA salt derived from licorice. Works as an emollient to soften the upper layer of the skin and can help calm down inflammation. Might be helpful for skin lightening~0.3–0.7%
Anti-oxidation
Not advertised by the brand · Glutathione, Adenosine + 1 more
Strong evidence

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

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~0.15–0.65%
AdenosineEffect: LowMight help improve cell turnover and reduce inflammation in skin. One study shows that the ingredients might be able to help reduce dynamic wrinkles (for example, in the corners of the eyes or on the forehead)~0.35–0.85%
Ascorbyl glucosideUnder-dosedEffect: MediumA vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in products~0.15–0.55%
Anti-blemish
Not advertised by the brand · Niacinamide
Strong evidence

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~1–1.5%

Can it cause trouble?

Irritancy
2 strong irritants: Isoamyl p-methoxycinnamate, Parfum
Medium risk
We flagged 16 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
Isoamyl p-methoxycinnamateAmiloxate or Neo Heliopan E1000. A UV filter. It is effective against UVB and UVA II rays. Not available in the US. It can be irritatingHigh~3.7–5.6%est.
ParfumAn aromatic blend of unspecified and possibly irritating ingredientsHigh~0.35–0.85%est.
Diethylamino hydroxybenzoyl hexyl benzoateUvinul A Plus. A new generation broad spectrum sunscreen that offers an effective protection especially in the UVA range. It is stable in formulations. Unfortunately, is not approved by the FDA (US) yetMedium~2.8–4.1%est.
Bis-ethylhexyloxyphenol methoxyphenyl triazineTinosorb S. One of the most effective broad spectrum sunscreen ingredients. Protects from both UVA and UVB rays. It is photostable. Unfortunately, not approved by FDA (US) yet.Medium~2.2–3.3%est.
Terephthalylidene dicamphor sulfonic acidEcamsule, Mexoryl SX. A UV filter. Is effective mostly against the UVA rays. It is legally marketed in the US with the FDA approval since 2006, even though the ingredient is not on the official FDA list of the approved sunscreen active ingredients. It is photostableMedium~1.8–2.8%est.
Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymerA gelling agent that thickens the product consistency and leaves the skin with a velvety finishMedium~0.5–1.15%est.
Potassium cetyl phosphateHelps oil and water mix togetherMedium~0.5–1.2%est.
HydroxyacetophenoneUsed to increase effectiveness of preservativesMedium~0.4–0.95%est.
Polyglyceryl-6 behenateHelps oil and water mix togetherMedium~0.4–0.9%est.
Caprylyl glycolHelps preserve products and creates a nice product textureMedium~0.4–0.95%est.
Sodium hyaluronate crosspolymerAttracts water into the upper layer of the skinMedium~0.35–0.75%est.
1,2-hexanediolA preservativeMedium~0.15–0.7%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~0.15–0.65%est.
Ascorbyl glucosideA vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in productsMedium~0.15–0.55%est.
Benzyl glycolHelps dissolve other ingredients and preserve productsMedium~0.15–0.55%est.
EthylhexylglycerinA preservativeMedium~0.1–0.4%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
Cetearyl alcoholA non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture2/5~0.85–1.25%est.
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Ingredients

Filter by role to see what each ingredient is doing.

Hydrolyzed collagen~22–33%
Key active
Irritation risk
Low
Works for
Moisturizing

A typically plant-derived compound that is supposed mimic human collagen. Cannot penetrate the skin barrier so is not particularly useful in skincare products beyond attracting water to the upper layer of the skin

More about Hydrolyzed collagen
Dibutyl adipate~4.8–7.1%
Formula
Irritation risk
Low
Works for
Moisturizing

Helps soften the upper layer of the skin and create a nice product consistency

More about Dibutyl adipate
Water~4.9–7.3%
Formula
Irritation risk
Low

Plain old water

More about Water
Propanediol~3.6–5.5%
Formula
Irritation risk
Low

Acts as a solvent for other ingredients. Speeds up the absorption of other ingredients into the skin

More about Propanediol
Isoamyl p-methoxycinnamate~3.7–5.6%
UV filterKey activeIrritant · high
Irritation risk
High
Works for
Sun protection

Amiloxate or Neo Heliopan E1000. A UV filter. It is effective against UVB and UVA II rays. Not available in the US. It can be irritating

More about Isoamyl p-methoxycinnamate
Diethylamino hydroxybenzoyl hexyl benzoate~2.8–4.1%
UV filterKey activeIrritant · medium
Irritation risk
Medium
Works for
Sun protection

Uvinul A Plus. A new generation broad spectrum sunscreen that offers an effective protection especially in the UVA range. It is stable in formulations. Unfortunately, is not approved by the FDA (US) yet

More about Diethylamino hydroxybenzoyl hexyl benzoate
Bis-ethylhexyloxyphenol methoxyphenyl triazine~2.2–3.3%
UV filterKey activeIrritant · medium
Irritation risk
Medium
Works for
Sun protection

Tinosorb S. One of the most effective broad spectrum sunscreen ingredients. Protects from both UVA and UVB rays. It is photostable. Unfortunately, not approved by FDA (US) yet.

More about Bis-ethylhexyloxyphenol methoxyphenyl triazine
Terephthalylidene dicamphor sulfonic acid~1.8–2.8%
UV filterKey activeIrritant · medium
Irritation risk
Medium
Works for
Sun protection

Ecamsule, Mexoryl SX. A UV filter. Is effective mostly against the UVA rays. It is legally marketed in the US with the FDA approval since 2006, even though the ingredient is not on the official FDA list of the approved sunscreen active ingredients. It is photostable

More about Terephthalylidene dicamphor sulfonic acid
C12-15 alkyl benzoate~1.3–1.9%
Key active
Irritation risk
Low
Works for
Moisturizing

Enhances the product texture and makes it more spreadable. Helps reduce water loss from the outer layer of skin. Extands the shelf life by preventing bacteria growth

More about C12-15 alkyl benzoate
Niacinamide~1–1.5%
Hero · Moisturizing, Anti-blemish
Irritation risk
Low
Works for
Anti-agingEvens skin toneMoisturizingAnti-blemishReduces irritationAntibacterialReduces rednessAnti-inflammatory

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
Propylene glycol dicaprylate~0.9–1.35%
Formula
Irritation risk
Low
Works for
Moisturizing

Helps soften the upper layer of the skin and create a nice product texture

More about Propylene glycol dicaprylate
Tromethamine~0.55–1.35%
Formula
Irritation risk
Low

Helps adjust pH in products

More about Tromethamine
Polyglyceryl-6 stearate~0.8–1.2%
Key active
Irritation risk
Low
Works for
Moisturizing

Helps soften the upper layer of the skin

More about Polyglyceryl-6 stearate
Cetearyl alcohol~0.85–1.25%
Key activeComedogenic 2/5
Irritation risk
Low
Comedogenicity
2/5
Works for
CleansingMoisturizing

A non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture

More about Cetearyl alcohol
Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer~0.5–1.15%
Irritant · medium
Irritation risk
Medium

A gelling agent that thickens the product consistency and leaves the skin with a velvety finish

More about Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer
Potassium cetyl phosphate~0.5–1.2%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps oil and water mix together

More about Potassium cetyl phosphate
Hydrogenated palm glycerides~0.55–1.25%
Formula
Irritation risk
Low
Works for
CleansingMoisturizing

An emollient that softens the skin

More about Hydrogenated palm glycerides
Dipropylene glycol~0.4–1%
Formula
Irritation risk
Low

Helps to dissolve other ingredients in a formulation. Slows down the rate of product drying

More about Dipropylene glycol
Hydroxyacetophenone~0.4–0.95%
Irritant · medium
Irritation risk
Medium

Used to increase effectiveness of preservatives

More about Hydroxyacetophenone
Parfum~0.35–0.85%
Irritant · high
Irritation risk
High

An aromatic blend of unspecified and possibly irritating ingredients

More about Parfum
Polyglyceryl-6 behenate~0.4–0.9%
Irritant · medium
Irritation risk
Medium

Helps oil and water mix together

More about Polyglyceryl-6 behenate
Caprylyl glycol~0.4–0.95%
Irritant · medium
Irritation risk
Medium
Works for
Moisturizing

Helps preserve products and creates a nice product texture

More about Caprylyl glycol
Sphingomonas ferment extract~0.35–0.85%
Formula
Irritation risk
Low
More about Sphingomonas ferment extract
Adenosine~0.35–0.85%
Key active
Irritation risk
Low
Works for
Anti-agingMoisturizingAnti-oxidation

Might help improve cell turnover and reduce inflammation in skin. One study shows that the ingredients might be able to help reduce dynamic wrinkles (for example, in the corners of the eyes or on the forehead)

More about Adenosine
Sorbitan isostearate~0.35–0.85%
Formula
Irritation risk
Low
Works for
Cleansing

Helps oil and water mix together

More about Sorbitan isostearate
Hydrolyzed hyaluronic acid~0.35–0.8%
Key active
Irritation risk
Low
Works for
Moisturizing

One of the best moisturizing ingredients. Attracts water into the upper layer of the skin. A version of it is naturally present in skin

More about Hydrolyzed hyaluronic acid
Hyaluronic acid~0.35–0.8%
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
Hydrolyzed sodium hyaluronate~0.35–0.85%
Key active
Irritation risk
Low
Works for
Moisturizing

Attracts water into the upper layer of the skin

More about Hydrolyzed sodium hyaluronate
Sodium hyaluronate crosspolymer~0.35–0.75%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Moisturizing

Attracts water into the upper layer of the skin

More about Sodium hyaluronate crosspolymer
Sodium hyaluronate~0.35–0.75%
Key active
Irritation risk
Low
Works for
Moisturizing

One of the best moisturizing ingredients. Attracts water into the upper layer of the skin

More about Sodium hyaluronate
Potassium hyaluronate~0.35–0.8%
Formula
Irritation risk
Low
More about Potassium hyaluronate
Hydroxypropyltrimonium hyaluronate~0.45–1%
Formula
Irritation risk
Low
More about Hydroxypropyltrimonium hyaluronate
Dipotassium glycyrrhizate~0.3–0.7%
Under-dosed
Irritation risk
Low
Works for
MoisturizingAnti-inflammatoryEvens skin tone

A salt derived from licorice. Works as an emollient to soften the upper layer of the skin and can help calm down inflammation. Might be helpful for skin lightening

More about Dipotassium glycyrrhizate
Sodium acetylated hyaluronate~0.15–0.65%
Key active
Irritation risk
Low
Works for
Moisturizing

A type of hyaluronic acid that works as an excellent moisturizer by attracting water into the upper layer of the skin. Is typically feels less sticky on the skin compared to the usual hyaluronic acid

More about Sodium acetylated hyaluronate
Hydrolyzed glycosaminoglycans~0.15–0.65%
Key active
Irritation risk
Low
Works for
Moisturizing

Long sugars that help attract water to the upper layer of the skin

More about Hydrolyzed glycosaminoglycans
1,2-hexanediol~0.15–0.7%
Irritant · medium
Irritation risk
Medium

A preservative

More about 1,2-hexanediol
Glycerin~0.2–0.75%
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
Glutathione~0.15–0.65%
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
Biotin~0.15–0.65%
Formula
Irritation risk
Low
Works for
Moisturizing

Might have some moisturising properties. Is not effective when applied topically beyond some moisturizing effect

More about Biotin
Ascorbyl glucoside~0.15–0.55%
Under-dosedIrritant · medium
Irritation risk
Medium
Works for
Evens skin toneAnti-agingAnti-oxidation

A vitamin C derivative that is more stable but less potent than pure form of vitamin C. Has a potential to boost collagen production, nutralise free radicals and reduce hyperpigmentation, but the required concentration is likely to be much higher than for the pure form of vitamin C, limiting the ingredient's effectiveness in products

More about Ascorbyl glucoside
Benzyl glycol~0.15–0.55%
Irritant · medium
Irritation risk
Medium

Helps dissolve other ingredients and preserve products

More about Benzyl glycol
Beta-carotene~0.15–0.55%
Formula
Irritation risk
Low

A colorant adding orange or bright yellow color

More about Beta-carotene
Soluble collagen~0.2–0.8%
Key active
Irritation risk
Low
Works for
Moisturizing

A typically plant-derived compound that is supposed mimic human collagen. Cannot penetrate the skin barrier so is not particularly useful in skincare products beyond attracting water to the upper layer of the skin

More about Soluble collagen
Collagen extract~0.1–0.45%
Formula
Irritation risk
Low
More about Collagen extract
Ethylhexylglycerin~0.1–0.4%
Irritant · medium
Irritation risk
Medium

A preservative

More about Ethylhexylglycerin
Acetyl hexapeptide-8~0.1–0.45%
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 Acetyl hexapeptide-8
Copper tripeptide-1~0.1–0.4%
Hero · Moisturizing
Irritation risk
Low
Works for
MoisturizingAnti-aging

A naturally occurring peptide. One of the most studied peptides in dermatology. It is sometimes abbreviated GHK-Cu. Belongs to the class of carrier peptides. It stimulates both synthesis and breakdown of collagen in skin. It is released in skin wounds and inflammation to support healing. It accelerates wound-healing of the skin and can stimulate hair growth. There are preliminary studies that confirm that copper tripeptide can help support collagen production reducing fine lines and wrinkles and decrease inflammation in skin.

More about Copper tripeptide-1
Palmitoyl pentapeptide-4~0.1–0.3%
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 pentapeptide-4
Oligopeptide-1~0.1–0.3%
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 Oligopeptide-1
Ingredient list view

Hydrolyzed collagen, Dibutyl adipate, Water, Propanediol, Isoamyl p-methoxycinnamate, Diethylamino hydroxybenzoyl hexyl benzoate, Bis-ethylhexyloxyphenol methoxyphenyl triazine, Terephthalylidene dicamphor sulfonic acid, C12-15 alkyl benzoate, Niacinamide, Propylene glycol dicaprylate, Tromethamine, Polyglyceryl-6 stearate, Cetearyl alcohol, Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, Potassium cetyl phosphate, Hydrogenated palm glycerides, Dipropylene glycol, Hydroxyacetophenone, Parfum, Polyglyceryl-6 behenate, Caprylyl glycol, Sphingomonas ferment extract, Adenosine, Sorbitan isostearate, Hydrolyzed hyaluronic acid, Hyaluronic acid, Hydrolyzed sodium hyaluronate, Sodium hyaluronate crosspolymer, Sodium hyaluronate, Potassium hyaluronate, Hydroxypropyltrimonium hyaluronate, Dipotassium glycyrrhizate, Sodium acetylated hyaluronate, Hydrolyzed glycosaminoglycans, 1,2-hexanediol, Glycerin, Glutathione, Biotin, Ascorbyl glucoside, Benzyl glycol, Beta-carotene, Soluble collagen, Collagen extract, Ethylhexylglycerin, Acetyl hexapeptide-8, Copper tripeptide-1, Palmitoyl pentapeptide-4, Oligopeptide-1

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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
K-SECRETCollagen Boosting Secret Day CreamYOUR PRODUCTthe Torriden StoreDive-In Low Molecular Hyaluronic Watery Sun Serum PA++++ SPF50+MEDI-PEELPeptide 9 UV Derma Sun CreamP.CALMWater Barrier Sun Cream
Match—75%74%74%
Price$25.60—$26.39+$0.79$15.75−$9.85
Shared key ingredients—12 of 2313 of 236 of 23
Key difference—PanthenolTripeptide-1Madecassoside
Irritancy Medium Low High Low
SPFSPF 50SPF 50SPF 50SPF 50
Drying alcohol————
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Product summary

We believe that "K-SECRET - Collagen Boosting Secret Day Cream" can provide reliable sun protection based on the ingredients listed. We love that it can protect from both UVA and UVB rays (not all sunscreens with SPF ratings give UVA protection. UVA rays do not cause sunburn, but still damage our skin and lead to early aging).

Because it includes good moisturizing ingredients, it can also work as a hydrating day cream. Like all broad-spectrum sunscreens, this product helps prevent early signs of aging.

Sunscreen filters

This is a so-called "chemical" sunscreen. It means that it uses organic UV filters. They typically offer good sun protection and rarely leave a white cast, but they can be irritating for some people with sensitive skin. The UV filters in this sunscreen are: tinosorb s 2.20% - 3.30%, uvinul a plus 2.80% - 4.10%, amiloxate 3.70% - 5.60% and terephthalylidene dicamphor sulfonic acid 1.80% - 2.80%.

Irritation risk

This formulation includes some common irritants, including ingredients that do not provide a benefit for the skin. We assess the overall irritancy of this moisturizer to be medium. 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.

Price

The product retails for 25.60$ in the United States.

For a detailed price comparison: click here.

Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 23 studies and safety reviews.

  1. 1
    Photo-allergic contact dermatitis caused by isoamyl p-methoxycinnamate in an 'organic' sunscreenpubmed.ncbi.nlm.nih.gov
  2. 2
    Niacinamide - mechanisms of action and its topical use in dermatologyncbi.nlm.nih.gov
  3. 3
    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
  4. 4
    Safety Assessment of Tromethamine as Used in Cosmeticscir-safety.org
  5. 5
    Evaluation of anti-wrinkle efficacy of adenosine-containing products using the FOITS techniquencbi.nlm.nih.gov
  6. 6
    Efficacy of a New Topical Nano-hyaluronic Acid in Humansncbi.nlm.nih.gov
K-SECRET Collagen Boosting Secret Day Cream
K-SECRETCollagen Boosting Secret Day Cream
Buy at Yesstyle$25.60Amazon

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Buy at Yesstyle$25.60Amazon

As an Amazon Associate, WIMJ earns from qualifying purchases.