COSRX AC Collection Blemish Care Sheet Mask

COSRX AC Collection Blemish Care Sheet Mask

Efficacy100/100IrritancyMedium

Works for

Evens skin tone
Niacinamide, Arbutin + 1 more
Works well
What the product description says
“Niacinamide and arbutine, ingredients effective in treating hyperpigmentation, help erase and prevent traces left from acne.”
Source: Cosrx

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

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

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

NiacinamideKey activeEffect: HighIs proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production~2.1–3.1%
ArbutinKey activeEffect: MediumBeta-arbutin. Can help to reduce hyperpigmentation and has an anti-oxidant effect when used in high enough concentration. Is less effective compared to alpha-arbutin~0.1–0.35%
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~0.3–0.75%
Anti-blemish
Niacinamide, Allantoin
Works well
What the product description says
“Calm your blemishes and replenish moisture in one sheet!”
Source: Cosrx

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~2.1–3.1%
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~0.2–0.8%
Moisturizing
Niacinamide, Glycerin + 10 more
Works well
What the product description says
“Calm your blemishes and replenish moisture in one sheet!”
Source: Cosrx

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, glycerin.

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.

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~2.1–3.1%
GlycerinKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant~3.7–5.6%
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~0.45–1.1%
EctoinKey activeEffect: HighSoftens the upper layer of the skin and can support skin barrier function~0.1–0.4%
Madecassic acidKey activeEffect: HighAn active compound of Centella Asiatica plant extract. In combination with other active compounds of Centella Asiatica extract (asiaticoside, madecasosside and asiatic acid), madecassic acid has been shown to be helpful in wound-healing, restoring skin barrier function and supporting collagen production in skin. It can, however, itself be irritating~0.05–0.15%
Asiatic acidKey activeEffect: HighAn active compound of Centella Asiatica plant extract. In combination with other active compounds of Centella Asiatica extract (asiaticoside, madecasosside and madecassic acid) asiatic acid has been shown to be helpful in wound-healing, restoring skin barrier function and supporting collagen production in skin. It can, however, itself be irritating~0.05–0.2%
AsiaticosideKey activeEffect: HighAn active compound of Centella Asiatica plant extract. In combination with other active compounds of Centella Asiatica extract (madecasosside, asiatic acid and madecassic acid), asiaticoside has been shown to be helpful in wound-healing, restoring skin barrier function and supporting collagen production in skin. It can, however, itself be irritating~0.05–0.25%
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~5.8–8.7%
Dextrin· HumectantEffect: LowA sugar that is used to stabilize the product formulation. Can help attract water to the upper layer of the skin~0.05–0.3%
Dipotassium glycyrrhizateUnder-dosedA 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~0.3–0.75%
AllantoinUnder-dosedHelps calm down inflammation in skin and can help reduce itching. Helps to repair the skin barrier and keep skin hydrated~0.2–0.8%
Caprylic/capric triglycerideUnder-dosedA good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerin~0.15–0.6%
Anti-aging
Side benefit · Niacinamide, Asiaticoside
Works well

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

These ingredients in the product can also be helpful, even though there is less evidence for their effectiveness: asiaticoside.

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.

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~2.1–3.1%
AsiaticosideKey activeEffect: MediumAn active compound of Centella Asiatica plant extract. In combination with other active compounds of Centella Asiatica extract (madecasosside, asiatic acid and madecassic acid), asiaticoside has been shown to be helpful in wound-healing, restoring skin barrier function and supporting collagen production in skin. It can, however, itself be irritating~0.05–0.25%
Anti-oxidation
Side benefit · Arbutin, Asiaticoside
Works well

This product contains antioxidants (asiaticoside) 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 - arbutin also can have an antioxidant effect, but there is less evidence to confirm their effectiveness in skin.

ArbutinKey activeEffect: MediumBeta-arbutin. Can help to reduce hyperpigmentation and has an anti-oxidant effect when used in high enough concentration. Is less effective compared to alpha-arbutin~0.1–0.35%
AsiaticosideKey activeEffect: HighAn active compound of Centella Asiatica plant extract. In combination with other active compounds of Centella Asiatica extract (madecasosside, asiatic acid and madecassic acid), asiaticoside has been shown to be helpful in wound-healing, restoring skin barrier function and supporting collagen production in skin. It can, however, itself be irritating~0.05–0.25%

Can it cause trouble?

Irritancy
2 strong irritants: Melaleuca alternifolia leaf extract, Melaleuca alternifolia leaf oil
Medium risk
We flagged 13 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
Melaleuca alternifolia leaf extractAn essential oil that can be irritating. Has some anti-bacterial propertiesHigh~1.6–2.4%est.
Melaleuca alternifolia leaf oilAn essential oil that can be irritating. Has some anti-bacterial propertiesHigh~0.1–0.45%est.
1,2-hexanediolA preservativeMedium~0.55–1.3%est.
Hexylene glycolHelps create a more spreadable product textureMedium~1.2–1.8%est.
HydroxyacetophenoneUsed to increase effectiveness of preservativesMedium~1–1.5%est.
Acrylates/c10-30 alkyl acrylate crosspolymerMaintains the texture of skincare products. Allows the product to spread evenly. Helps oil and water mix togetherMedium~0.4–0.9%est.
Disodium edtaStabilizes the product formulationMedium~0.2–0.8%est.
Polyglyceryl-10 laurateHelps water and oil mix togetherMedium~0.15–0.6%est.
Caprylic/capric triglycerideA good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerinMedium~0.15–0.6%est.
ArbutinBeta-arbutin. Can help to reduce hyperpigmentation and has an anti-oxidant effect when used in high enough concentration. Is less effective compared to alpha-arbutinMedium~0.1–0.35%est.
AsiaticosideAn active compound of Centella Asiatica plant extract. In combination with other active compounds of Centella Asiatica extract (madecasosside, asiatic acid and madecassic acid), asiaticoside has been shown to be helpful in wound-healing, restoring skin barrier function and supporting collagen production in skin. It can, however, itself be irritatingMedium~0.05–0.25%est.
Asiatic acidAn active compound of Centella Asiatica plant extract. In combination with other active compounds of Centella Asiatica extract (asiaticoside, madecasosside and madecassic acid) asiatic acid has been shown to be helpful in wound-healing, restoring skin barrier function and supporting collagen production in skin. It can, however, itself be irritatingMedium~0.05–0.2%est.
Madecassic acidAn active compound of Centella Asiatica plant extract. In combination with other active compounds of Centella Asiatica extract (asiaticoside, madecasosside and asiatic acid), madecassic acid has been shown to be helpful in wound-healing, restoring skin barrier function and supporting collagen production in skin. It can, however, itself be irritatingMedium~0.05–0.15%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~40–60%
Formula
Irritation risk
Low

Plain old water

More about Water
Butylene glycol~5.8–8.7%
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
Glycerin~3.7–5.6%
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
Propanediol~2.8–4.2%
Formula
Irritation risk
Low

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

More about Propanediol
Niacinamide~2.1–3.1%
Hero · Moisturizing, Anti-blemish
Irritation risk
Low
Works for
Anti-agingAnti-blemishEvens skin toneMoisturizingReduces irritationAntibacterialAnti-inflammatoryReduces redness

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
Melaleuca alternifolia leaf extract~1.6–2.4%
Irritant · high
Irritation risk
High

An essential oil that can be irritating. Has some anti-bacterial properties

More about Melaleuca alternifolia leaf extract
1,2-hexanediol~0.55–1.3%
Irritant · medium
Irritation risk
Medium

A preservative

More about 1,2-hexanediol
Hexylene glycol~1.2–1.8%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps create a more spreadable product texture

More about Hexylene glycol
Hydroxyacetophenone~1–1.5%
Irritant · medium
Irritation risk
Medium

Used to increase effectiveness of preservatives

More about Hydroxyacetophenone
Hydroxyethylcellulose~0.85–1.3%
Formula
Irritation risk
Low

Used to thicken product formulations and create gel-like textures

More about Hydroxyethylcellulose
Arginine~0.45–1.1%
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
Allantoin~0.2–0.8%
Under-dosed
Irritation risk
Low
Works for
Anti-inflammatoryMoisturizingReduces irritationAnti-blemishReduces rednessExfoliation

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

More about Allantoin
Acrylates/c10-30 alkyl acrylate crosspolymer~0.4–0.9%
Irritant · medium
Irritation risk
Medium

Maintains the texture of skincare products. Allows the product to spread evenly. Helps oil and water mix together

More about Acrylates/c10-30 alkyl acrylate crosspolymer
Dipotassium glycyrrhizate~0.3–0.75%
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
Xanthan gum~0.3–0.75%
Formula
Irritation risk
Low
Works for
Cleansing

Used to create a thicker product consistency

More about Xanthan gum
Disodium edta~0.2–0.8%
Irritant · medium
Irritation risk
Medium

Stabilizes the product formulation

More about Disodium edta
Polyglyceryl-10 myristate~0.15–0.7%
Formula
Polyglyceryl-10 laurate~0.15–0.6%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps water and oil mix together

More about Polyglyceryl-10 laurate
Melaleuca alternifolia leaf oil~0.1–0.45%
Irritant · high
Irritation risk
High
Works for
Antibacterial

An essential oil that can be irritating. Has some anti-bacterial properties

More about Melaleuca alternifolia leaf oil
Caprylic/capric triglyceride~0.15–0.6%
Under-dosedIrritant · medium
Irritation risk
Medium
Works for
Moisturizing

A good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerin

More about Caprylic/capric triglyceride
Ectoin~0.1–0.4%
Key active
Irritation risk
Low
Works for
Moisturizing

Softens the upper layer of the skin and can support skin barrier function

More about Ectoin
Arbutin~0.1–0.35%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Evens skin toneAnti-oxidation

Beta-arbutin. Can help to reduce hyperpigmentation and has an anti-oxidant effect when used in high enough concentration. Is less effective compared to alpha-arbutin

More about Arbutin
Asiaticoside~0.05–0.25%
Key activeIrritant · medium
Irritation risk
Medium
Works for
MoisturizingAnti-oxidationReduces irritationAnti-aging

An active compound of Centella Asiatica plant extract. In combination with other active compounds of Centella Asiatica extract (madecasosside, asiatic acid and madecassic acid), asiaticoside has been shown to be helpful in wound-healing, restoring skin barrier function and supporting collagen production in skin. It can, however, itself be irritating

More about Asiaticoside
Dextrin~0.05–0.3%
Formula
Irritation risk
Low
Works for
Moisturizing

A sugar that is used to stabilize the product formulation. Can help attract water to the upper layer of the skin

More about Dextrin
Asiatic acid~0.05–0.2%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Anti-inflammatoryMoisturizingReduces irritation

An active compound of Centella Asiatica plant extract. In combination with other active compounds of Centella Asiatica extract (asiaticoside, madecasosside and madecassic acid) asiatic acid has been shown to be helpful in wound-healing, restoring skin barrier function and supporting collagen production in skin. It can, however, itself be irritating

More about Asiatic acid
Madecassic acid~0.05–0.15%
Key activeIrritant · medium
Irritation risk
Medium
Works for
MoisturizingReduces irritation

An active compound of Centella Asiatica plant extract. In combination with other active compounds of Centella Asiatica extract (asiaticoside, madecasosside and asiatic acid), madecassic acid has been shown to be helpful in wound-healing, restoring skin barrier function and supporting collagen production in skin. It can, however, itself be irritating

More about Madecassic acid
Ingredient list view

Water, Butylene glycol, Glycerin, Propanediol, Niacinamide, Melaleuca alternifolia leaf extract, 1,2-hexanediol, Hexylene glycol, Hydroxyacetophenone, Hydroxyethylcellulose, Arginine, Allantoin, Acrylates/c10-30 alkyl acrylate crosspolymer, Dipotassium glycyrrhizate, Xanthan gum, Disodium edta, Polyglyceryl-10 myristate, Polyglyceryl-10 laurate, Melaleuca alternifolia leaf oil, Caprylic/capric triglyceride, Ectoin, Arbutin, Asiaticoside, Dextrin, Asiatic acid, Madecassic acid

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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
COSRXAC Collection Blemish Care Sheet MaskYOUR PRODUCTCrystal MaskAmethyst Crystal Deep Hydration Mask TrialP.CALMUnderPore Mask PackVT CosmeticsTx-toning Daily Mask
Match—95%93%91%
Price$3.72$9.14+$5.42$3.20−$0.52$20.61+$16.89
Shared key ingredients—7 of 116 of 118 of 11
Key difference—MadecassosideSalicylic AcidMadecassoside
Irritancy Medium Medium Low Medium
Drying alcohol————
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Product summary

"COSRX - AC Collection Blemish Care Sheet Mask" is effective for: Evens skin tone, Anti-blemish, Moisturizing and Anti-aging

Ingredient callouts

  • A good concentration of Niacinamide (2.10% - 3.10%). Niacinamide is a well-studied multi-tasking active. It is stable, and can work well in almost any hydrating formulation. There is solid evidence that Niacinamide can help support skin barrier, regulate oil production and reduce acne and clogged pores. It also helps to fight photodamage and improve the skin tone, reducing pigmentation marks.
  • Actives derived from an extract of the Centella Asiatica plant (also known as Gotu Kola) - madecassic acid 0.05% - 0.15%, asiatic acid 0.05% - 0.20% and asiaticoside 0.05% - 0.25% The Centella Asiatica Actives, even in low concentration, can help reduce inflammation in skin, strengthen the skin barrier and reduce photodamage. They can also help to decrease scarring.
  • Humectants (glycerin 3.70% - 5.60% and arginine 0.45% - 1.10%). These ingredients help attract water to the upper layer of the skin and improve the skin hydration.

About the brand

According to Cruelty-Free Kitty "COSRX" is cruelty free and so is its parent company.

Price

The product retails from 4.95A$ up to 9.32A$ in Australia, from 3.72$ up to 9.00$ in the United States, at around 6.75£ in the United Kingdom and for 11.40CA$ in Canada.

For a detailed price comparison: click here.

Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 15 studies and safety reviews.

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COSRX AC Collection Blemish Care Sheet Mask
COSRXAC Collection Blemish Care Sheet Mask

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