C-Tetra

Serum

Lists fragrance allergens, essential oils, silicones

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Fragrance-free serums

Retinol Complex Serum

+C Vit Priming Oil

10% Benzoyl Peroxide Spot Treatment

10% Niacinamide Serum

15% Vitamin C + EGF Serum

Haruharu Wonder

3% PHA Gentle Liquid Exfoliating Serum

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All 11 ingredients

C-Tetra by Medik8 lists 11 ingredients, in label order. Each line says what the ingredient does in the formula.

simmondsia chinensis seed oil

cyclopentasiloxane

cyclohexasiloxane

tetrahexyldecyl ascorbate

citrus grandis peel oil

tocopheryl acetate

ppg-12/smdi copolymer

Ingredients: Medik8 website · Updated October 21, 2026