Medik8 C-Tetra Cream

Medik8 C-Tetra Cream

Efficacy87/100IrritancyHigh
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Works for

2 of 2 advertised claims delivered

Evens skin tone
Tetrahexyldecyl ascorbate
Strong evidence
What the product description says
“The fast-absorbing lipid-soluble formula contains tetrahexyldecyl ascorbate to provide a powerful antioxidant protection with minimal irritation and help to maintain skin health, improve uneven skin tone and restore radiance.”
Source: Face the future

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

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

Tetrahexyldecyl ascorbateKey activeEffect: HighBeing a lipid soluble form of vitamin C, it is more stable than ascorbic acid, but still degrades quickly and needs to be stabilized in a formulation with another ingredient. It is claimed to penetrate skin better than pure vitamin C and have the the similar benefits, but solid studies of its effectiveness are lacking. Is likely to require a higher concentration in a product than pure vitamin C to be effective. It might be able to help reduce pore clogging.~2.8–4.3%
Moisturizing
Caprylic/capric triglyceride, Glycerin + 3 more
Good evidence
What the product description says
“Formulated with a 100% stable form of Tetrahexyldecyl Ascorbate (a lipid form of L- Ascorbic Acid) and Vitamin E, this moisturiser protects skin against free radicals and ageing environmental damage.”
Source: Face the future

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, sodium hyaluronate.

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: caprylic/capric triglyceride, heptyl undecylenate.

Caprylic/capric triglycerideKey active· Emollient, OcclusiveEffect: HighA good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerin~3.9–5.9%
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~0.4–0.9%
Sodium hyaluronateKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Attracts water into the upper layer of the skin~0.4–1%
Heptyl undecylenateKey active· Emollient, OcclusiveEffect: MediumHelps soften the upper layer of the skin, reduce water loss from the skin surface over time and create a nice product finish~4.9–7.4%
Caprylyl glycol· Humectant, EmollientEffect: LowHelps preserve products and creates a nice product texture~0.4–0.95%
Anti-oxidation
Not advertised by the brand · Tetrahexyldecyl ascorbate, Tocopheryl acetate + 1 more
Strong evidence

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

Tetrahexyldecyl ascorbateKey activeEffect: HighBeing a lipid soluble form of vitamin C, it is more stable than ascorbic acid, but still degrades quickly and needs to be stabilized in a formulation with another ingredient. It is claimed to penetrate skin better than pure vitamin C and have the the similar benefits, but solid studies of its effectiveness are lacking. Is likely to require a higher concentration in a product than pure vitamin C to be effective. It might be able to help reduce pore clogging.~2.8–4.3%
Tocopheryl acetateEffect: LowA more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.~1–1.5%
Pelargonium graveolens flower oilEffect: LowAn essential oil. Can be irritating. Can become an allergen with oxidation~0.15–0.55%

Can it cause trouble?

Irritancy
9 strong irritants: Citrus grandis peel oil, Citrus limon peel oil + 7 more — patch-test recommended
High risk
We flagged 17 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
PhenylpropanolHelps mask the smell of other ingredients and helps preserve the product formulationHigh~0.2–0.8%est.
Citrus grandis peel oilA plant oil with high content of volatile compounds that, especially when exposed to air, can cause allergic reactions and irritate the skinHigh~0.15–0.6%est.
Citrus limon peel oilA highly irritating fragranceHigh~0.15–0.5%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.
Pelargonium graveolens flower oilAn essential oil. Can be irritating. Can become an allergen with oxidationHigh~0.15–0.55%est.
LimoneneA common frangrance that can easily irritate skin, especially if exposed to air, light or heatHigh~0.1–0.35%est.
CitronellolA fragrance. Can be irritatingHigh~0.05–0.3%est.
LinaloolA fragrance. Can be irritatingHigh~0.05–0.2%est.
GeraniolA fragrance. Can be irritatingHigh~0.05–0.15%est.
CitralA fragrance with a lemon scent. A likely irritantHigh~0.05–0.15%est.
Heptyl undecylenateHelps soften the upper layer of the skin, reduce water loss from the skin surface over time and create a nice product finishMedium~4.9–7.4%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~3.9–5.9%est.
Tetrahexyldecyl ascorbateBeing a lipid soluble form of vitamin C, it is more stable than ascorbic acid, but still degrades quickly and needs to be stabilized in a formulation with another ingredient. It is claimed to penetrate skin better than pure vitamin C and have the the similar benefits, but solid studies of its effectiveness are lacking. Is likely to require a higher concentration in a product than pure vitamin C to be effective. It might be able to help reduce pore clogging.Medium~2.8–4.3%est.
MethylpropanediolHelps dissolve other ingredients in a formulationMedium~2.2–3.3%est.
Tocopheryl acetateA more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.Medium~1–1.5%est.
Caprylyl glycolHelps preserve products and creates a nice product textureMedium~0.4–0.95%est.
Disodium edtaStabilizes the product formulationMedium~0.3–0.75%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
Heptyl undecylenate~4.9–7.4%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Moisturizing

Helps soften the upper layer of the skin, reduce water loss from the skin surface over time and create a nice product finish

More about Heptyl undecylenate
Caprylic/capric triglyceride~3.9–5.9%
Key activeIrritant · 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
Tetrahexyldecyl ascorbate~2.8–4.3%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Evens skin toneAnti-agingAnti-oxidation

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

More about Tetrahexyldecyl ascorbate
Methylpropanediol~2.2–3.3%
Irritant · medium
Irritation risk
Medium

Helps dissolve other ingredients in a formulation

More about Methylpropanediol
Cetearyl olivate~1.9–2.8%
Formula
Irritation risk
Low
Works for
Cleansing

Helps oil and water mix together

More about Cetearyl olivate
Cetearyl isononanoate~1.6–2.4%
Formula
Irritation risk
Low

An emollient that softens the skin and helps prevent moisture loss.

More about Cetearyl isononanoate
Distarch phosphate~1.3–1.9%
Formula
Tocopheryl acetate~1–1.5%
Irritant · medium
Irritation risk
Medium
Works for
Anti-oxidation

A more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.

More about Tocopheryl acetate
Sodium polyacrylate~0.9–1.35%
Formula
Irritation risk
Low
Works for
Mattifying

Used to create a gel-like product texture, as well as to stabilize emulsions

More about Sodium polyacrylate
Sorbitan olivate~0.5–1.2%
Formula
Irritation risk
Low
Works for
Cleansing

Helps oil and water mix together

More about Sorbitan olivate
Sodium hyaluronate~0.4–1%
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
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
Glycerin~0.4–0.9%
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
Disodium edta~0.3–0.75%
Irritant · medium
Irritation risk
Medium

Stabilizes the product formulation

More about Disodium edta
Phenylpropanol~0.2–0.8%
Irritant · high
Irritation risk
High

Helps mask the smell of other ingredients and helps preserve the product formulation

More about Phenylpropanol
Citrus grandis peel oil~0.15–0.6%
Irritant · high
Irritation risk
High

A plant oil with high content of volatile compounds that, especially when exposed to air, can cause allergic reactions and irritate the skin

More about Citrus grandis peel oil
Citrus limon peel oil~0.15–0.5%
Irritant · high
Irritation risk
High

A highly irritating fragrance

More about Citrus limon peel oil
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
Pelargonium graveolens flower oil~0.15–0.55%
Irritant · high
Irritation risk
High
Works for
Anti-oxidation

An essential oil. Can be irritating. Can become an allergen with oxidation

More about Pelargonium graveolens flower oil
Sodium hydroxide~0.1–0.45%
Formula
Irritation risk
Low

Used to adjust the product's pH

More about Sodium hydroxide
Limonene~0.1–0.35%
Irritant · high
Irritation risk
High

A common frangrance that can easily irritate skin, especially if exposed to air, light or heat

More about Limonene
Citronellol~0.05–0.3%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Citronellol
Linalool~0.05–0.2%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Linalool
Geraniol~0.05–0.15%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Geraniol
Citral~0.05–0.15%
Irritant · high
Irritation risk
High

A fragrance with a lemon scent. A likely irritant

More about Citral
Ingredient list view

Water, Heptyl undecylenate, Caprylic/capric triglyceride, Tetrahexyldecyl ascorbate, Methylpropanediol, Cetearyl olivate, Cetearyl isononanoate, Distarch phosphate, Tocopheryl acetate, Sodium polyacrylate, Sorbitan olivate, Sodium hyaluronate, Caprylyl glycol, Glycerin, Disodium edta, Phenylpropanol, Citrus grandis peel oil, Citrus limon peel oil, Citrus aurantium bergamia fruit oil, Pelargonium graveolens flower oil, Sodium hydroxide, Limonene, Citronellol, Linalool, Geraniol, Citral

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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
Medik8C-Tetra CreamYOUR PRODUCTOFRAVitamin C CreamMario BadescuVitamin C CreamColleen Rothschild BeautyVitamin C Nourishing Cream
Match—69%68%65%
Price$21.44—$18.00−$3.44—
Shared key ingredients—4 of 54 of 53 of 5
Key difference—OxybenzoneNiacinamidePanthenol
Irritancy High Medium Medium Medium
Drying alcohol————
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As an Amazon Associate, WIMJ earns from qualifying purchases.