COSRX The 6 Peptide Skin Booster Serum
- Water
- Solvent base
- Dipropylene Glycol
- Solvent, texture enhancer
- Glycerin
- Humectant for hydration
- Pentylene Glycol
- Solvent, humectant
- 1,2-Hexanediol
- Solvent, preservation aid
- Niacinamide
- Brightening and barrier support
- Acetyl Hexapeptide-8
- Peptide for anti-wrinkle signaling
- Copper Tripeptide-1
- Peptide for repair and regeneration
- sh-Polypeptide-121
- Signaling peptide, skin conditioning
- Dipeptide Diaminobutyroyl Benzylamide Diacetate
- Peptide for wrinkle smoothing
- Oligopeptide-68
- Peptide for tone and firming
- Palmitoyl Tripeptide-8
- Soothing, anti-redness peptide
- Allantoin
- Soothing, skin protectant
- Sodium Hyaluronate
- Humectant, water-binding
- Acetyl Glucosamine
- Hydration and barrier support
- Serine
- Amino acid humectant
- Alanine
- Amino acid humectant
- Glycine
- Amino acid humectant
- Threonine
- Amino acid humectant
- Arginine
- Amino acid, skin conditioning
- Proline
- Amino acid humectant
- Betaine
- Osmolyte, humectant
- Sodium PCA
- Humectant, NMF component
- Sodium Lactate
- Humectant, buffering agent
Water, Dipropylene Glycol, Glycerin, Pentylene Glycol, 1,2-Hexanediol, Niacinamide, Acetyl Hexapeptide-8, Copper Tripeptide-1, sh-Polypeptide-121, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Oligopeptide-68, Palmitoyl Tripeptide-8, Allantoin, Sodium Hyaluronate, Acetyl Glucosamine, Serine, Alanine, Glycine, Threonine, Arginine, Proline, Betaine, Sodium PCA, Sodium Lactate, PCA, Glutamic Acid, Lysine HCl, Tocopherol, Dextran, Glycine Soja (Soybean) Oil, Hydrogenated Lecithin, Ammonium Acryloyldimethyltaurate/VP Copolymer, Polyacrylate Crosspolymer-6, Butylene Glycol, Xanthan Gum, Ethylhexylglycerin, Adenosine, Polyquaternium-51, Disodium EDTA, Citric Acid, Caprylyl Glycol, t-Butyl Alcohol, Potassium Sorbate, Sodium Oleate
Is COSRX The 6 Peptide Skin Booster Serum worth it?
COSRX The 6 Peptide Skin Booster Serum scores 4.0 out of 5.0 for efficacy (Strong) and 4.6 out of 5.0 for safety (Safe) on DemythSkin's independent ingredient analysis. This is a peptide-heavy hydration booster with solid anti-aging signaling, but it’s more of a supporting player than a standalone powerhouse treatment. Multiple well-studied peptides (including Acetyl Hexapeptide-8, Copp
What are the key active ingredients in COSRX The 6 Peptide Skin Booster Serum?
COSRX The 6 Peptide Skin Booster Serum contains no gold-standard actives — its formula is built on supporting and base ingredients rather than clinically transformative actives.
Does COSRX The 6 Peptide Skin Booster Serum contain fragrance or known irritants?
DemythSkin flags these ingredients in COSRX The 6 Peptide Skin Booster Serum as potential irritants: t-Butyl Alcohol.
How is COSRX The 6 Peptide Skin Booster Serum scored?
DemythSkin grades every product on two independent axes: efficacy (whether the ingredients have clinical evidence of working) and safety (irritation and sensitisation risk). Ingredients are classified S through D against a database of over 3,000 compounds. No brand pays for a score.
Analysis last updated: 2026-09-16. DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score. DemythSkin earns commission from affiliate links (Amazon Associates and others). Scores are computed before any commercial relationship — the link follows the verdict, never the other way around.