COSRX

The 6 Peptide Skin Booster Serum 150ml

Name: COSRX The 6 Peptide Skin Booster Serum 150ml
Brand: COSRX

150ml

Quick Summary

Best forNot stated by the brand

Worth notingNo fragrance listed

Key ingredientsNiacinamide, Adenosine, Lactic Acid

OverallThe 6 Peptide Skin Booster Serum is a serum from COSRX built around niacinamide (barrier-supporting), adenosine (smoothing) and lactic acid (exfoliating). No fragrance is listed in its ingredients.

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Ingredient Analysis

41 of 44 ingredients identifiedNo fragrance listed

Key ingredients

Niacinamide Adenosine Lactic Acid

Full ingredient list (44) — tap a highlighted ingredient to learn more

Water Solvent & base Generally gentle
Dipropylene Glycol Humectant & solvent All skin types
Glycerin Humectant & moisturiser Generally gentle
Pentylene Glycol Humectant & solvent All skin types
1,2-Hexanediol Humectant & solvent All skin types
Niacinamide Barrier support & even tone Generally gentle
Ammonium Acryloyldimethyltaurate/VP Copolymer Thickener & gel former All skin types
Polyacrylate Crosspolymer-6 Texture & smoothing agents All skin types
Butylene Glycol Humectant & solvent Generally gentle
Xanthan Gum Natural thickener Generally gentle

Show the other 34 ingredients · 1 with a caution note

Ethylhexylglycerin Preservative All skin types
Adenosine Smoothing & anti-wrinkle Generally gentle
Polyquaternium-51 Thickener & gel former All skin types
Disodium EDTA Chelator & stabiliser All skin types
Citric Acid pH adjuster All skin types
Caprylyl Glycol Humectant & preservative booster Generally gentle
Betaine Humectant & soothing agent Generally gentle
t-Butyl Alcohol
Sodium PCA Humectant (skin's own NMF) Generally gentle
Sodium Lactate Gentle AHA exfoliant Sensitive skin caution
Acetyl Hexapeptide-8 Signalling & firming Generally gentle
Copper Tripeptide-1 Signalling & firming Generally gentle
PCA Humectant (skin's own NMF) Generally gentle
sh-Polypeptide-121 Signalling & firming Generally gentle
Serine Hydration & barrier support Generally gentle
Alanine Hydration & barrier support Generally gentle
Allantoin Soothing & skin-conditioning Generally gentle
Sodium Hyaluronate Hydration & moisture retention Generally gentle
Acetyl Glucosamine Brightening & hydrating amino sugar Generally gentle
Glycine Hydration & barrier support Generally gentle
Glutamic Acid Hydration & barrier support Generally gentle
Lysine HCl
Threonine Hydration & barrier support Generally gentle
Dipeptide Diaminobutyroyl Benzylamide Diacetate Signalling & firming Generally gentle
Arginine Hydration & barrier support Generally gentle
Tocopherol Antioxidant & conditioning Generally gentle
Oligopeptide-68 Signalling & firming Generally gentle
Proline Hydration & barrier support Generally gentle
Dextran Hydrating sugar polymer Generally gentle
Palmitoyl Tripeptide-8 Signalling & firming Generally gentle
Glycine Soja (Soybean) Oil Rich plant emollients Generally gentle
Hydrogenated Lecithin Emollient & emulsifier Generally gentle
Potassium Sorbate Preservative All skin types
Sodium Oleate

Ingredients from the Boots.com listing, checked 19 Oct 2026, in INCI order. Brands reformulate, so check the pack if you react to an ingredient. Highlighted ingredients link to our guide. Informational only — not medical advice.

Common questions

Is COSRX The 6 Peptide Skin Booster Serum fragrance-free?

Yes. No fragrance, essential oils or fragrance allergens are listed in its ingredients.

Does COSRX The 6 Peptide Skin Booster Serum contain alcohol?

No drying alcohol (alcohol denat. or ethanol) is listed.

Is COSRX The 6 Peptide Skin Booster Serum safe for fungal acne?

It contains 2 ingredients that fungal-acne (Malassezia) guides usually avoid: fatty-acid esters & glycerides (sodium oleate); plant oils & butters (glycine soja (soybean) oil). How much they matter depends on the amount and the rest of the formula. The evidence comes mainly from lab studies of yeast growth, and fungal acne needs a diagnosis from a GP or dermatologist.

Is COSRX The 6 Peptide Skin Booster Serum suitable for sensitive skin?

Its ingredient list avoids the most common irritants: no fragrance, essential oils, drying alcohol or strong exfoliating acids are listed. Reactions are individual, so patch-test anything new.