The 6 Peptide Skin Booster Serum
COSRX The 6 Peptide Skin Booster Serum scores 8.5/9.8 overall. It ranks highest in low irritation risk (9.5) and hydration efficacy (9.2).
✶ Hero ingredients
Glycol-based humectant
One of the most effective humectants
Humectant with antimicrobial properties
Score breakdown
Estimated — based on ingredient analysis. Scores refine as user reviews are added.
Scores last verified: July 2026
What makes COSRX The 6 Peptide Skin Booster Serum stand out
COSRX The 6 Peptide Skin Booster Serum is an excellent serum with an overall score of 8.5/9.8. Positioned in the mid-range bracket, it delivers a well-rounded formulation that balances efficacy with gentleness. The formula leads with Dipropylene Glycol, Glycerin, Pentylene Glycol — ingredients that support the skin barrier and moisture levels.
It performs well on hydration (9.2) and low irritation risk (9.5) and active strength (6.5).
Is this right for you?
Great for
- ✓Dry or dehydrated skin — strong moisture-binding profile
- ✓Sensitive skin — low irritation risk with a gentle formulation
- ✓Safety-conscious shoppers — clean formulation with minimal flags
Key ingredients
- ✶Dipropylene Glycol
Draws in moisture — #2 in the INCI list
- ✶Glycerin
Draws in moisture — #3 in the INCI list
- ✶Pentylene Glycol
Draws in moisture — #4 in the INCI list
- ✶Niacinamide
Works on your skin — #6 in the INCI list
- ✶Acetyl Hexapeptide-8
Works on your skin — #7 in the INCI list
What creators are saying
TikTokFull ingredient list
40 ingredients — listed in INCI order (highest concentration first)
Compare with similar products
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Ingredient breakdown
- Draws in moisture16
- Works on your skin9
- Holds the formula together5
- Keeps the product fresh4
- Other ingredient2
- Formula balancers2
- Softens and smooths2