Oh K! Vitamin C Watermelon Sheet Mask

Oh K! Vitamin C Watermelon Sheet Mask

Efficacy50/100IrritancyHigh

Works for

Anti-aging
Centella asiatica extract, Sodium ascorbyl phosphate
May help
What the product description says
“Designed to moisturise and nourish the complexion, the mask is enriched with Vitamin C to help increase collagen production and brighten the complexion.”
Source: Lookfantastic

This product contains centella asiatica extract. This ingredient might be able to help reduce and prevent fine lines and wrinkles, improve skin elasticity and firmness, but there is not enough evidence that it actually works.

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.~1.2–1.8%
Sodium ascorbyl phosphateEffect: Low, below effective doseA stable derivative of vitamin C. It is oil-soluble which means it is more likely to penetrate the skin compared to the pure form of vitamin C (which is water-soluble), but it is less bio-available and is way less effective in stimulating collagen and reducing wrinkles compared to the pure form of vitamin C (L-ascorbic acid) and its other derivatives (for example, magnesium ascorbyl phosphate). At the same time, this vitamin C derivative has been shown in studies to be effective in reducing acne, blemishes and clogged pores. It is less irritating then the pure form of vitamin C~0.05–0.25%
Moisturizing
Glycerin, Centella asiatica extract + 3 more
Works
What the product description says
“Designed to moisturise and nourish the complexion, the mask is enriched with Vitamin C to help increase collagen production and brighten the complexion.”
Source: Lookfantastic

This product contains good ingredients to attract water to the upper layer of the skin. These ingredients are called "humectants": glycerin, sodium hyaluronate.

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).

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~3.3–5%
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.~1.2–1.8%
Sodium hyaluronateKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin~0.1–0.3%
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~2–3%
Glyceryl caprylate· EmollientEffect: LowAn emollient that can also help water and oil mix together, as well as prevent bacteria growth in products~0.4–0.9%
Evens skin tone
No ingredient credited for this claim
Not delivered
What the product description says
“Designed to moisturise and nourish the complexion, the mask is enriched with Vitamin C to help increase collagen production and brighten the complexion.”
Source: Lookfantastic

Effective ingredients missing or their concentration is too low

Anti-oxidation
Side benefit · Centella asiatica extract, Paeonia suffruticosa root extract + 2 more
May help

This product contains antioxidants (centella asiatica extract) that might be able to help neutralize free radicals in skin to lessen the damage it gets from the UV light (sun). There is not enough evidence to confirm their effectiveness in skin though.

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.~1.2–1.8%
Paeonia suffruticosa root extractEffect: Low~1.6–2.4%
Citrullus lanatus fruit extractEffect: Low, below effective doseA plant extract that can contain an antioxidant compound~0.05–0.25%
Sodium ascorbyl phosphateUnder-dosedA stable derivative of vitamin C. It is oil-soluble which means it is more likely to penetrate the skin compared to the pure form of vitamin C (which is water-soluble), but it is less bio-available and is way less effective in stimulating collagen and reducing wrinkles compared to the pure form of vitamin C (L-ascorbic acid) and its other derivatives (for example, magnesium ascorbyl phosphate). At the same time, this vitamin C derivative has been shown in studies to be effective in reducing acne, blemishes and clogged pores. It is less irritating then the pure form of vitamin C~0.05–0.25%

Can it cause trouble?

Irritancy
3 strong irritants: Alcohol, Parfum + 1 more — patch-test recommended
High risk
We flagged 13 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
AlcoholCan be drying and contribute to skin irritation. Used in formulars to dissolve other ingredients, create a thinner product consistency or for its antibacterial propertiesHigh~2.7–4.1%est.
Paeonia suffruticosa root extract—High~1.6–2.4%est.
Chamomilla recutita flower extractPlant extract that can have healing and anti-inflammatory properties. It is a potential allergen and can be irritatingHigh~0.4–0.95%est.
ParfumAn aromatic blend of unspecified and possibly irritating ingredientsHigh~0.05–0.1%est.
LinaloolA fragrance. Can be irritatingHigh~0.01–0.1%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~1.2–1.8%est.
1,2-hexanediolA preservativeMedium~0.45–1.05%est.
Peg-60 hydrogenated castor oilHelps oil and water mix togetherMedium~0.85–1.3%est.
EthylhexylglycerinA preservativeMedium~0.15–0.5%est.
Potassium hydroxideUsed to adjust the pH level of productsMedium~0.1–0.5%est.
Citrullus lanatus fruit extractA plant extract that can contain an antioxidant compoundMedium~0.05–0.25%est.
Sodium ascorbyl phosphateA stable derivative of vitamin C. It is oil-soluble which means it is more likely to penetrate the skin compared to the pure form of vitamin C (which is water-soluble), but it is less bio-available and is way less effective in stimulating collagen and reducing wrinkles compared to the pure form of vitamin C (L-ascorbic acid) and its other derivatives (for example, magnesium ascorbyl phosphate). At the same time, this vitamin C derivative has been shown in studies to be effective in reducing acne, blemishes and clogged pores. It is less irritating then the pure form of vitamin CMedium~0.05–0.25%est.
Disodium edtaStabilizes the product formulationMedium~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
Dipropylene glycol~6.9–10.4%
Formula
Irritation risk
Low

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

More about Dipropylene glycol
Glycerin~3.3–5%
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
Alcohol~2.7–4.1%
Irritant · high
Irritation risk
High
Works for
Antibacterial

Can be drying and contribute to skin irritation. Used in formulars to dissolve other ingredients, create a thinner product consistency or for its antibacterial properties

More about Alcohol
Butylene glycol~2–3%
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
Paeonia suffruticosa root extract~1.6–2.4%
Irritant · high
Irritation risk
High
Works for
Anti-oxidation
More about Paeonia suffruticosa root extract
Centella asiatica extract~1.2–1.8%
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
1,2-hexanediol~0.45–1.05%
Irritant · medium
Irritation risk
Medium

A preservative

More about 1,2-hexanediol
Peg-60 hydrogenated castor oil~0.85–1.3%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps oil and water mix together

More about Peg-60 hydrogenated castor oil
Carbomer~0.55–1.25%
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
Chamomilla recutita flower extract~0.4–0.95%
Irritant · high
Irritation risk
High
Works for
Anti-inflammatory

Plant extract that can have healing and anti-inflammatory properties. It is a potential allergen and can be irritating

More about Chamomilla recutita flower extract
Glyceryl caprylate~0.4–0.9%
Formula
Irritation risk
Low
Works for
CleansingMoisturizing

An emollient that can also help water and oil mix together, as well as prevent bacteria growth in products

More about Glyceryl caprylate
Hydroxyethylcellulose~0.2–0.8%
Formula
Irritation risk
Low

Used to thicken product formulations and create gel-like textures

More about Hydroxyethylcellulose
Xanthan gum~0.15–0.65%
Formula
Irritation risk
Low
Works for
Cleansing

Used to create a thicker product consistency

More about Xanthan gum
Ethylhexylglycerin~0.15–0.5%
Irritant · medium
Irritation risk
Medium

A preservative

More about Ethylhexylglycerin
Potassium hydroxide~0.1–0.5%
Irritant · medium
Irritation risk
Medium

Used to adjust the pH level of products

More about Potassium hydroxide
Sodium hyaluronate~0.1–0.3%
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
Citrullus lanatus fruit extract~0.05–0.25%
Irritant · medium
Irritation risk
Medium
Works for
Anti-oxidation

A plant extract that can contain an antioxidant compound

More about Citrullus lanatus fruit extract
Sodium ascorbyl phosphate~0.05–0.25%
Under-dosedIrritant · medium
Irritation risk
Medium
Works for
Anti-blemishAnti-oxidationAnti-aging

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

More about Sodium ascorbyl phosphate
Disodium edta~0.05–0.15%
Irritant · medium
Irritation risk
Medium

Stabilizes the product formulation

More about Disodium edta
Parfum~0.05–0.1%
Irritant · high
Irritation risk
High

An aromatic blend of unspecified and possibly irritating ingredients

More about Parfum
Linalool~0.01–0.1%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Linalool
Ingredient list view

Water, Dipropylene glycol, Glycerin, Alcohol, Butylene glycol, Paeonia suffruticosa root extract, Centella asiatica extract, 1,2-hexanediol, Peg-60 hydrogenated castor oil, Carbomer, Chamomilla recutita flower extract, Glyceryl caprylate, Hydroxyethylcellulose, Xanthan gum, Ethylhexylglycerin, Potassium hydroxide, Sodium hyaluronate, Citrullus lanatus fruit extract, Sodium ascorbyl phosphate, Disodium edta, Parfum, Linalool

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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
Oh K!Vitamin C Watermelon Sheet MaskYOUR PRODUCTMake P:remComfort Me. Firming Hole MaskBootsUltra Fine Sheet Mask With Added Cucumber ExtractVitamasquesBlack Gold Dust Sheet Mask
Match—51%51%50%
Price—$2.75—$4.01
Shared key ingredients—3 of 33 of 33 of 3
Key difference—AdenosineBetaine—
Irritancy High Medium Medium High
Drying alcohol Contains drying alcohol —— Contains drying alcohol
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Product summary

"Oh K! - Vitamin C Watermelon Sheet Mask" is effective for: Anti-inflammatory

This product could be helpful for: Moisturizing and Anti-aging, but its actives are not the most effective or are not well-studied.

Ingredient callouts

  • Humectants (sodium hyaluronate 0.10% - 0.30% and glycerin 3.30% - 5.00%). These ingredients help attract water to the upper layer of the skin and improve the skin hydration.

Price

The product retails for 3.00$ in the United States, from 7.00CA$ up to 17.99CA$ in Canada and for 4.00£ in the United Kingdom.

For a detailed price comparison: click here.

Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 19 studies and safety reviews.

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Oh K! Vitamin C Watermelon Sheet Mask
Oh K!Vitamin C Watermelon Sheet Mask

Affiliate links · As an Amazon Associate, WIMJ earns from qualifying purchases.

As an Amazon Associate, WIMJ earns from qualifying purchases.