C-Tetra Advanced

serum · 30 ml · Skincare

Medik8 C-Tetra Advanced is free of fragrance, drying alcohol, sulfates, silicones, parabens and MI / MCI, going by its full 31-ingredient list, with hyaluronic acid, glycerin and vitamin C. List checked November 5, 2026.

The catch: it contains essential oils (Citrus Grandis (Grapefruit) Peel Oil) and labelled fragrance allergens (Citral, Linalool).

Fragrance-free
Contains essential oils
Contains labelled fragrance allergens
No drying alcohol
Sulfate-free
Silicone-free
Paraben-free
No MI/MCI

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Key ingredients in C-Tetra Advanced

Hyaluronic acid
A humectant that pulls water into the top layer of skin.
Glycerin
A classic humectant that keeps skin hydrated.
Vitamin C
An antioxidant that brightens and evens tone.
Squalane
A light, skin-compatible emollient.
Vitamin E
An antioxidant that protects the formula and the skin.

Full ingredient list, decoded

31 ingredients, in label order (highest amount first; below about 1% the order is free).

1Aqua (Water)Aqua is the INCI name for water, the main base of many creams, lotions and cleansers…
2Tetrahexyldecyl Ascorbate
3IsododecaneIsododecane is a light, branched oil made only of carbon and hydrogen, mainly used as a…
4PropanediolPropanediol is a clear liquid that draws water toward the skin. Its jobs are as a…
5Acetyl Glucosamine
6SqualaneSqualane is a light, oil-like ingredient that softens skin and helps it hold moisture.…
7TocopherolTocopherol is vitamin E, a fat-soluble antioxidant. Its main job is to slow the…
8Acetyl Zingerone
9Camellia Sinensis (Green Tea) Leaf Vesicles
10HydroxyacetophenoneHydroxyacetophenone is a preservative-support ingredient that helps protect a formula…
11Sodium HyaluronateHyaluronic acid is a sugar-based molecule, naturally found in skin, that holds a lot of…
12CelluloseCellulose is the main structural fiber in plant cell walls. In skincare and makeup, it…
13Avena Sativa (Oat) Kernel ExtractA plant-derived ingredient made from the kernels of the oat seed. Its main job is to…
14GlycerinGlycerin is a clear, thick, odorless liquid that pulls water into the skin and helps…
15Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
16Citrus Grandis (Grapefruit) Peel OilEssential oils
17Sucrose Stearate
18Tetrasodium Glutamate DiacetateTetrasodium Glutamate Diacetate is a chelating agent, a salt made from glutamic acid,…
19EthylhexylglycerinEthylhexylglycerin is a lab-made, skin-friendly ingredient that boosts the power of…
20Acrylates/C10-30 Alkyl Acrylate CrosspolymerA synthetic polymer that thickens and stabilizes formulas, giving lotions, gels and…
21Xanthan GumXanthan Gum is a thickener and stabilizer made by fermenting sugar with a bacterium. It…
22Sodium BenzoateSodium benzoate is the sodium salt of benzoic acid, a water-soluble powder used mainly…
23Cellulose GumA plant-derived thickener made from cellulose, the fiber found in plant cell walls,…
241,2-Hexanediol1,2-Hexanediol is a small, clear liquid that acts as a solvent, a humectant and a…
25Polysorbate 60Polysorbate 60 is a mild, water-loving emulsifier made from sorbitol, ethylene oxide…
26Sorbitan IsostearateSorbitan Isostearate is a common emulsifier made by joining sorbitol with isostearic…
27Citric AcidCitric acid is a mild, naturally occurring acid found in citrus fruit. In skincare and…
28PhenoxyethanolA synthetic preservative that helps stop bacteria, yeast and mold from growing in…
29CitralCitral is a lemon-scented compound found in lemongrass and other citrus oils, used…Labelled fragrance allergens
30LinaloolLinalool is a fragrance compound found naturally in flowers and herbs, and in skincare…Labelled fragrance allergens
31LimoneneLimonene is a natural scent molecule found in citrus peel oils. It gives products a…Labelled fragrance allergens

Source: Medik8 product page, eu.medik8.com/products/c-tetra-advanced, retrieved November 5, 2026.

Every flag we check

Check	Result	Ingredients found
Fragrance	None listed	—
Essential oils	Contains	Citrus Grandis (Grapefruit) Peel Oil (#16)
Labelled fragrance allergens	Contains	Citral (#29), Linalool (#30), Limonene (#31)
Drying alcohol	None listed	—
Sulfates	None listed	—
Silicones	None listed	—
Parabens	None listed	—
MI / MCI	None listed	—
Formaldehyde releasers	None listed	—
Mineral oil & petrolatum	None listed	—
Lanolin	None listed	—
Chemical UV filters	None listed	—

Frequently asked questions

Is Medik8 C-Tetra Advanced fragrance-free?

Yes. Medik8 C-Tetra Advanced lists no parfum or fragrance, but it does contain essential oils (Citrus Grandis (Grapefruit) Peel Oil). Checked against its full ingredient list on November 5, 2026.

Does Medik8 C-Tetra Advanced contain silicones, sulfates or parabens?

Silicones: none listed. Sulfates: none listed. Parabens: none listed.

Which ingredient rules does Medik8 C-Tetra Advanced pass?

Its full list passes our ingredient rules for MI allergy, acne-prone skin, psoriasis and pregnancy. Key ingredients: Hyaluronic acid, Glycerin, Vitamin C and Squalane.