Medik8 C-Tetra Eye Serum

Medik8 C-Tetra Eye Serum

Efficacy91/100IrritancyHigh

Works for

Anti-aging
Tetrahexyldecyl ascorbate
Works well
What the product description says
“Powered by established vitamin C, the antioxidant-rich treatment delivers a host of benefits from smoothing the appearnace of fine lines to minimising the look of dark circles.”
Source: Lookfantastic

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

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.

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.~3.3–5%
Evens skin tone
Tetrahexyldecyl ascorbate
Works well
What the product description says
“Boast a well-rested complexion with Medik8's C-Tetra Eye Serum; a brightening and deeply hydrating formula that quickly absorbs to leave skin feeling refreshed and radiant.”
Source: Lookfantastic

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.~3.3–5%
Moisturizing
Simmondsia chinensis seed oil, Cyclopentasiloxane + 1 more
Works
What the product description says
“Boast a well-rested complexion with Medik8's C-Tetra Eye Serum; a brightening and deeply hydrating formula that quickly absorbs to leave skin feeling refreshed and radiant.”
Source: Lookfantastic

This product can help soften the skin and reduce its moisture loss with emollients and occlusives: simmondsia chinensis seed oil, cyclopentasiloxane.

Keep in mind that this product does not contain effective ingredients to attract water to the upper layer of the skin. This is why an additional product with humectants like glycerin or hyaluronic acid can be helpful (apply it before this product for the best results).

Simmondsia chinensis seed oilKey active· Emollient, OcclusiveEffect: HighSoftens the upper layer of skin and helps restore the healthy skin barrier. Has shown to help calm down inflammation in skin. It is a stable oil, meaning that it retains its properties even when exposed to air.~25–38%
CyclopentasiloxaneKey active· EmollientEffect: MediumA silicone that helps improve the product texture and spreadability. Can absorb oil creating a short-term mattifying effect on the skin~9.8–14.7%
Cyclohexasiloxane· EmollientEffect: LowA silicone that serves as an emollient. Helps create a nice non-greasy feels~5.3–8%
Anti-oxidation
Side benefit · Tetrahexyldecyl ascorbate, Tocopheryl acetate
Works well

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.~3.3–5%
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.~2.2–3.2%

Can it cause trouble?

Irritancy
5 strong irritants: Citrus grandis peel oil, Limonene + 3 more — patch-test recommended
High risk
We flagged 8 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
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~1.4–2.1%est.
LimoneneA common frangrance that can easily irritate skin, especially if exposed to air, light or heatHigh~0.5–1.15%est.
CitralA fragrance with a lemon scent. A likely irritantHigh~0.4–0.95%est.
LinaloolA fragrance. Can be irritatingHigh~0.15–0.65%est.
GeraniolA fragrance. Can be irritatingHigh~0.15–0.55%est.
Simmondsia chinensis seed oilSoftens the upper layer of skin and helps restore the healthy skin barrier. Has shown to help calm down inflammation in skin. It is a stable oil, meaning that it retains its properties even when exposed to air.Medium~25–38%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~3.3–5%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~2.2–3.2%est.
Comedogenic
Clean of flagged comedogenic ingredients
None flagged

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Ingredients

Filter by role to see what each ingredient is doing.

Simmondsia chinensis seed oil~25–38%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Moisturizing

Softens the upper layer of skin and helps restore the healthy skin barrier. Has shown to help calm down inflammation in skin. It is a stable oil, meaning that it retains its properties even when exposed to air.

More about Simmondsia chinensis seed oil
Cyclopentasiloxane~9.8–14.7%
Key active
Irritation risk
Low
Works for
MoisturizingMattifying

A silicone that helps improve the product texture and spreadability. Can absorb oil creating a short-term mattifying effect on the skin

More about Cyclopentasiloxane
Cyclohexasiloxane~5.3–8%
Formula
Irritation risk
Low
Works for
Moisturizing

A silicone that serves as an emollient. Helps create a nice non-greasy feels

More about Cyclohexasiloxane
Tetrahexyldecyl ascorbate~3.3–5%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Anti-oxidationAnti-agingEvens skin tone

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
Tocopheryl acetate~2.2–3.2%
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
Citrus grandis peel oil~1.4–2.1%
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
Limonene~0.5–1.15%
Irritant · high
Irritation risk
High

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

More about Limonene
Citral~0.4–0.95%
Irritant · high
Irritation risk
High

A fragrance with a lemon scent. A likely irritant

More about Citral
Linalool~0.15–0.65%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Linalool
Geraniol~0.15–0.55%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Geraniol
Ingredient list view

Simmondsia chinensis seed oil, Cyclopentasiloxane, Cyclohexasiloxane, Tetrahexyldecyl ascorbate, Tocopheryl acetate, Citrus grandis peel oil, Limonene, Citral, Linalool, Geraniol

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🇦🇺 Recreate Yourself (AU)7 ml
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🇦🇺 Lookfantastic Australia (AU)7 ml
≈ $27.02
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🇬🇧 Cultbeauty (UK)7 ml
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🇬🇧 Lookfantastic (UK)7 ml
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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 Eye SerumYOUR PRODUCTDeVitaLuxe C17 Serummarie veroniqueC-Therapy SerumAfrican BotanicsVita-C Corrector
Match—56%56%55%
Price——$120.00$140.00
Shared key ingredients—2 of 32 of 32 of 3
Key difference—Camellia Sinensis Leaf ExtractSodium Ascorbyl PhosphateCannabis Sativa Seed Oil
Irritancy High Medium Medium Low
Drying alcohol————
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Medik8 C-Tetra Eye Serum
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Affiliate links · As an Amazon Associate, WIMJ earns from qualifying purchases.

As an Amazon Associate, WIMJ earns from qualifying purchases.