COSRX

COSRX AHA/BHA Refresh Vitamin C Daily Cream

Name: COSRX - AHA/BHA Refresh Vitamin C Daily Cream
Brand: COSRX

Efficacy100/100IrritancyHigh

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Works for

2 of 2 advertised claims delivered

Exfoliation

4 ingredients credited for this claim

Strong support

What the product description says

“Perfect for sensitive skin in need of rebalancing. Exfoliate for Smooth Skin!”

Source: Cosrx

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: betaine salicylate, glycolic acid, lactobionic acid.

Betaine salicylateKey activeEffect: HighExfoliating acid, a "relative" of salicylic acid~0.1–0.45%

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~0.1–0.4%

Lactobionic acidKey activeEffect: HighA polyhydroxy acid (PHA) that helps shed dead cells from the surface of the skin revealing a smoother, more even skin. PHAs tend to be gentler on the skin compared to AHAs (for example, glycolic acid). It also has hydrating properties and helps attract water to the upper layer of the skin. It can help calm down inflammation in skin and support restoration of the barrier function. It has an anti-oxidant effect as well. It can help reduce fine line, wrinkles and improve skin elasticity~0.15–0.55%

AllantoinEffect: Low, below effective doseHelps calm down inflammation in skin and can help reduce itching. Helps to repair the skin barrier and keep skin hydrated~0.3–0.75%

Evens skin tone

5 ingredients credited for this claim

Strong support

What the product description says

“Perfect for Dullness, Rough Skin, Dark Spot Why it’s Special Refreshing Daily Skin Boosting Cream Cream infused with extracts from juicy Kiwi and Dragon Fruit Skin to care for dullness and enhance the overall skin tone.”

Source: Cosrx

This product can help reduce hypepigmentation and even out the skin tone because it contains the following effective ingredients: alpha-arbutin, betaine salicylate, glycolic acid, lactobionic acid, niacinamide

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.

Alpha-arbutinKey activeEffect: HighMight help reduce hyperpigmentation when used regularly over a long period of time. Is more effective than beta-arbutin~0.2–0.7%

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~1.9–2.9%

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~0.1–0.4%

Anti-oxidation

Not advertised by the brand · 5 ingredients credited for this claim

Strong support

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

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)~0.3–0.75%

Actinidia chinensis fruit extractEffect: LowA plant extract that might have some anti-oxidant properties, but evidence of effectiveness in skin is lacking~23–34%

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~0.15–0.65%

Anti-blemish

Not advertised by the brand · 5 ingredients credited for this claim

Strong support

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.

In addition, this product contains betaine salicylate. It can help in reducing blemishes, even though it is less effective.

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

Betaine salicylateKey activeEffect: HighExfoliating acid, a "relative" of salicylic acid~0.1–0.45%

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~1.9–2.9%

Lactobionic acidKey activeEffect: MediumA polyhydroxy acid (PHA) that helps shed dead cells from the surface of the skin revealing a smoother, more even skin. PHAs tend to be gentler on the skin compared to AHAs (for example, glycolic acid). It also has hydrating properties and helps attract water to the upper layer of the skin. It can help calm down inflammation in skin and support restoration of the barrier function. It has an anti-oxidant effect as well. It can help reduce fine line, wrinkles and improve skin elasticity~0.15–0.55%

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~0.1–0.4%

AllantoinEffect: Low, below effective doseHelps calm down inflammation in skin and can help reduce itching. Helps to repair the skin barrier and keep skin hydrated~0.3–0.75%

Anti-aging

Not advertised by the brand · 6 ingredients credited for this claim

Strong support

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

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.

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)~0.3–0.75%

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~0.15–0.65%

Moisturizing

Not advertised by the brand · 13 ingredients credited for this claim

Strong support

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: arginine, betaine.

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: arginine, cetearyl alcohol.

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

Lactobionic acidHeroEffect: HighA polyhydroxy acid (PHA) that helps shed dead cells from the surface of the skin revealing a smoother, more even skin. PHAs tend to be gentler on the skin compared to AHAs (for example, glycolic acid). It also has hydrating properties and helps attract water to the upper layer of the skin. It can help calm down inflammation in skin and support restoration of the barrier function. It has an anti-oxidant effect as well. It can help reduce fine line, wrinkles and improve skin elasticity~0.15–0.55%

BetaineKey active· HumectantEffect: HighHelps attract water to the upper layer of the skin and improves the product texture~0.9–1.35%

Sodium hyaluronateKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin~0.2–0.8%

ArginineKey active· Humectant, OcclusiveEffect: HighAn amino acid that is naturally present in skin and helps keep it hydrated. When used together with AHAs, it can reduce their irritating effect on the skin~0.4–0.9%

PanthenolHero· HumectantEffect: HighHelps attract water to the upper layer of the skin and can help improve skin barrier function~0.4–0.9%

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)~0.3–0.75%

Cetearyl alcoholKey active· EmollientEffect: MediumA non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture~1.2–1.9%

Macadamia ternifolia seed oilKey active· EmollientEffect: MediumPlant oil from nuts that helps soften the upper layer of the skin. Contains a high concentration of oleic acid that can weaken skin's barrier function and increase water-loss while enhancing penetration of other ingredients~1.3–2%

Cetyl ethylhexanoate· EmollientEffect: LowAn emollient that helps soften the skin and creates a thicker product texture~2.9–4.3%

Butylene glycol· HumectantEffect: LowUsed to create a nice product texture and help delivery of other ingredients. Might be somewhat helpful in attracting water to the upper layer of the skin~3.3–4.9%

AllantoinUnder-dosedEffect: HighHelps calm down inflammation in skin and can help reduce itching. Helps to repair the skin barrier and keep skin hydrated~0.3–0.75%

Can it cause trouble?

Irritancy

3 strong irritants: Menthyl lactate, Mentha haplocalix extract + 1 more — patch-test recommended

High risk

We flagged 15 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.

IngredientFunctionIrritationEst. amount

Actinidia chinensis fruit extractA plant extract that might have some anti-oxidant properties, but evidence of effectiveness in skin is lackingHigh~23–34%est.

Menthyl lactateUsed as a fragrance. Can be irritatingHigh~0.15–0.7%est.

Mentha haplocalix extract—High~0.15–0.6%est.

Citrus aurantium bergamia fruit oilA plant oil with a high content of volatile compounds that can irritate the skin and lead to allergic reactions. Can lead to photosensitivityHigh~0.1–0.45%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~0.1–0.4%est.

Hippophae rhamnoides waterA plant-infused water. The concentration of compounds with potential skin benefits is unlikely to be effectiveMedium~4.4–6.6%est.

Cetyl ethylhexanoateAn emollient that helps soften the skin and creates a thicker product textureMedium~2.9–4.3%est.

1,2-hexanediolA preservativeMedium~0.55–1.25%est.

Macadamia ternifolia seed oilPlant oil from nuts that helps soften the upper layer of the skin. Contains a high concentration of oleic acid that can weaken skin's barrier function and increase water-loss while enhancing penetration of other ingredientsMedium~1.3–2%est.

Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymerA gelling agent that thickens the product consistency and leaves the skin with a velvety finishMedium~0.6–1.35%est.

EthylhexylglycerinA preservativeMedium~0.5–1.15%est.

Alpha-arbutinMight help reduce hyperpigmentation when used regularly over a long period of time. Is more effective than beta-arbutinMedium~0.2–0.7%est.

Lactobionic acidA polyhydroxy acid (PHA) that helps shed dead cells from the surface of the skin revealing a smoother, more even skin. PHAs tend to be gentler on the skin compared to AHAs (for example, glycolic acid). It also has hydrating properties and helps attract water to the upper layer of the skin. It can help calm down inflammation in skin and support restoration of the barrier function. It has an anti-oxidant effect as well. It can help reduce fine line, wrinkles and improve skin elasticityMedium~0.15–0.55%est.

Betaine salicylateExfoliating acid, a "relative" of salicylic acidMedium~0.1–0.45%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~0.1–0.4%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 texture2/5~1.2–1.9%est.

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Ingredients

Filter by role to see what each ingredient is doing.

Actinidia chinensis fruit extract~23–34%

Irritant · high

Irritation risk: High

Works for

Anti-oxidation

A plant extract that might have some anti-oxidant properties, but evidence of effectiveness in skin is lacking

More about Actinidia chinensis fruit extract

Hylocereus undatus fruit extract~4.8–7.3%

Formula

Irritation risk: Low

More about Hylocereus undatus fruit extract

Hippophae rhamnoides water~4.4–6.6%

Irritant · medium

Irritation risk: Medium

A plant-infused water. The concentration of compounds with potential skin benefits is unlikely to be effective

More about Hippophae rhamnoides water

Butylene glycol~3.3–4.9%

Formula

Irritation risk: Low

Works for

Moisturizing

Used to create a nice product texture and help delivery of other ingredients. Might be somewhat helpful in attracting water to the upper layer of the skin

More about Butylene glycol

Cetyl ethylhexanoate~2.9–4.3%

Irritant · medium

Irritation risk: Medium

Works for

Moisturizing

An emollient that helps soften the skin and creates a thicker product texture

More about Cetyl ethylhexanoate

Niacinamide~1.9–2.9%

Hero · Moisturizing, Anti-blemish

Irritation risk: Low

Works for

Evens skin toneAnti-blemishMoisturizingAnti-agingReduces 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

1,2-hexanediol~0.55–1.25%

Irritant · medium

Irritation risk: Medium

A preservative

More about 1,2-hexanediol

Macadamia ternifolia seed oil~1.3–2%

Key activeIrritant · medium

Irritation risk: Medium

Works for

Moisturizing

Plant oil from nuts that helps soften the upper layer of the skin. Contains a high concentration of oleic acid that can weaken skin's barrier function and increase water-loss while enhancing penetration of other ingredients

More about Macadamia ternifolia seed oil

Cetearyl alcohol~1.2–1.9%

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

Betaine~0.9–1.35%

Key active

Irritation risk: Low

Works for

Moisturizing

Helps attract water to the upper layer of the skin and improves the product texture

More about Betaine

Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer~0.6–1.35%

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

Ethylhexylglycerin~0.5–1.15%

Irritant · medium

Irritation risk: Medium

A preservative

More about Ethylhexylglycerin

Carbomer~0.45–1.05%

Formula

Irritation risk: Low

Works for

Cleansing

Helps create a thicker or gel-like product texture. It is not a surfactant but can be used in gentle cleansing formulations

More about Carbomer

Arginine~0.4–0.9%

Key active

Irritation risk: Low

Works for

Moisturizing

An amino acid that is naturally present in skin and helps keep it hydrated. When used together with AHAs, it can reduce their irritating effect on the skin

More about Arginine

Panthenol~0.4–0.9%

Hero · Moisturizing

Irritation risk: Low

Works for

MoisturizingReduces rednessReduces irritation

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

More about Panthenol

Cetearyl olivate~0.4–0.9%

Formula

Irritation risk: Low

Works for

Cleansing

Helps oil and water mix together

More about Cetearyl olivate

Sorbitan olivate~0.4–0.9%

Formula

Irritation risk: Low

Works for

Cleansing

Helps oil and water mix together

More about Sorbitan olivate

Allantoin~0.3–0.75%

Under-dosed

Irritation risk: Low

Works for

MoisturizingAnti-inflammatoryReduces rednessAnti-blemishReduces irritationExfoliation

Helps calm down inflammation in skin and can help reduce itching. Helps to repair the skin barrier and keep skin hydrated

More about Allantoin

Adenosine~0.3–0.75%

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

Sodium hyaluronate~0.2–0.8%

Key active

Irritation risk: Low

Works for

Moisturizing

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

More about Sodium hyaluronate

Alpha-arbutin~0.2–0.7%

Key activeIrritant · medium

Irritation risk: Medium

Works for

Evens skin tone

Might help reduce hyperpigmentation when used regularly over a long period of time. Is more effective than beta-arbutin

More about Alpha-arbutin

Menthyl lactate~0.15–0.7%

Irritant · high

Irritation risk: High

Used as a fragrance. Can be irritating

More about Menthyl lactate

Mentha haplocalix extract~0.15–0.6%

Irritant · high

Irritation risk: High

More about Mentha haplocalix extract

Tocopherol~0.15–0.65%

Under-dosed

Irritation risk: Low

Works for

Anti-oxidationAnti-inflammatoryMoisturizingAnti-aging

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

Lactobionic acid~0.15–0.55%

Hero · MoisturizingIrritant · medium

Irritation risk: Medium

Works for

Evens skin toneMoisturizingExfoliationAnti-agingAnti-oxidationAnti-inflammatoryAnti-blemish

A polyhydroxy acid (PHA) that helps shed dead cells from the surface of the skin revealing a smoother, more even skin. PHAs tend to be gentler on the skin compared to AHAs (for example, glycolic acid). It also has hydrating properties and helps attract water to the upper layer of the skin. It can help calm down inflammation in skin and support restoration of the barrier function. It has an anti-oxidant effect as well. It can help reduce fine line, wrinkles and improve skin elasticity

More about Lactobionic acid

Citrus aurantium bergamia fruit oil~0.1–0.45%

Irritant · high

Irritation risk: High

A plant oil with a high content of volatile compounds that can irritate the skin and lead to allergic reactions. Can lead to photosensitivity

More about Citrus aurantium bergamia fruit oil

Betaine salicylate~0.1–0.45%

Key activeIrritant · medium

Irritation risk: Medium

Works for

ExfoliationAnti-blemish

Exfoliating acid, a "relative" of salicylic acid

More about Betaine salicylate

Ascorbyl glucoside~0.1–0.4%

Under-dosedIrritant · medium

Irritation risk: Medium

Works for

Anti-agingAnti-oxidationEvens skin tone

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

Glycolic acid~0.1–0.4%

Key activeIrritant · high

Irritation risk: High

Works for

ExfoliationEvens skin toneAnti-agingAnti-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

Water~0.1–0.4%

Formula

Irritation risk: Low

Plain old water

More about Water

Ingredient list view

Actinidia chinensis fruit extract, Hylocereus undatus fruit extract, Hippophae rhamnoides water, Butylene glycol, Cetyl ethylhexanoate, Niacinamide, 1,2-hexanediol, Macadamia ternifolia seed oil, Cetearyl alcohol, Betaine, Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, Ethylhexylglycerin, Carbomer, Arginine, Panthenol, Cetearyl olivate, Sorbitan olivate, Allantoin, Adenosine, Sodium hyaluronate, Alpha-arbutin, Menthyl lactate, Mentha haplocalix extract, Tocopherol, Lactobionic acid, Citrus aurantium bergamia fruit oil, Betaine salicylate, Ascorbyl glucoside, Glycolic acid, Water

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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
	COSRXAHA/BHA Refresh Vitamin C Daily CreamYOUR PRODUCT	MedicubeDeep Vita C Capsule Cream	esfolio3HA Clear Cream	MIGUHARACica Bakuchiol Erasing Cream
Match	—	79%	75%	75%
Price	$19.00	$22.20+$3.20	$11.40−$7.60	$27.04+$8.04
Shared key ingredients	—	6 of 11	8 of 11	6 of 11
Key difference	—	Ascorbyl Glucoside	Salicylic Acid	Madecassoside
Irritancy	High	Medium	High	Medium
Drying alcohol	—	—	—	—
	View product	Shop	Shop	Shop

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Product summary

"COSRX - AHA/BHA Refresh Vitamin C Daily Cream" is effective for: Exfoliation, Evens skin tone, Anti-blemish, Anti-aging and Moisturizing

Ingredient callouts

We love that this moisturizer contains a good concentration of niacinamide 1.90% - 2.90%. 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.
Adenosine 0.30% - 0.75%. It is a compound that in involved in many biological processes inside the skin cells. According one high-quality clinical trial, topical Adenosine in low concentrations can somewhat help improve "deep wrinkles" - the wrinkles that appear with age in places where our faces are most dynamic (for example, on the forehead or in the corners of the eyes).
Panthenol (pro-vitamin B5) at about 0.40% - 0.90% concentration. In this concentration, Panthenol works effectively to improve the skin barrier and reduce inflammation.