COSRX The 6 Peptide Skin Booster Serum 150ml Copper Peptide Niacinamide Korean

COSRX The 6 Peptide Skin Booster Serum 150ml Copper Peptide Niacinamide Korean

COSRX The 6 Peptide Skin Booster Serum — 150 ml / 5.07 fl oz
6 Targeted Peptides Including Copper Peptide (GHK-Cu) + Niacinamide + Hyaluronic Acid | Korean First-Step Booster

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The COSRX 6 Peptide Skin Booster Serum is a lightweight, toner-like serum designed to be the very first step after cleansing — priming your skin so everything you layer afterward works better. It blends six targeted peptides, each addressing a different concern, alongside niacinamide, hyaluronic acid, adenosine, and a full amino acid complex.

It's a genuine COSRX bestseller for a reason: the texture is watery and non-sticky, it absorbs instantly without pilling, and it's fragrance-free and essential-oil-free — making it suitable for essentially every skin type, including sensitive.

Rated 4.7/5 from over 16,000 reviews on COSRX's official site, and clinically tested for hydration and firmness results by the Dermacosmetic Skin Science Laboratory.

The 6 Peptides — Each With a Specific Job:

• SH-Polypeptide-121 — supports collagen and plumping
• Copper Tripeptide-1 (GHK-Cu) — the celebrated copper peptide; supports skin renewal and retexturizing
• Dipeptide Diaminobutyroyl Benzylamide Diacetate — supports sebum control and the look of pores
• Oligopeptide-68 — brightening peptide; supports a more even, luminous tone
• Palmitoyl Tripeptide-8 — soothes and helps reduce skin sensitivity
• Acetyl Hexapeptide-8 — smooths the look of fine lines and supports firmness

Why customers love it:

• 6 peptides in one lightweight serum — targets fine lines, texture, pores, tone, firmness, and sensitivity at once
• Copper peptide (GHK-Cu) — one of the most sought-after peptides in skincare
• Niacinamide — supports tone, texture, and barrier function
• Adenosine + Hyaluronic Acid + Allantoin — elasticity, hydration, and calming support
• Amino acid complex (serine, alanine, glycine, arginine, proline, and more) for skin conditioning
• Toner-like texture — absorbs instantly, layers flawlessly, no stickiness or pilling
• First-step booster — amplifies the effect of the serum, ampoule, or cream you apply next
• Fragrance-free, essential-oil-free — suitable for sensitive skin
• Generous 150ml pump bottle — months of daily use
• Made in South Korea, cruelty-free

A Smart Way to Use Peptides — Pair Them With Retinol or Vitamin C:

This is one of the most useful things about this serum. Retinol delivers real results for fine lines and elasticity, but it can cause dryness and irritation. Vitamin C is powerful but can sting. COSRX specifically recommends applying this peptide booster first, letting it absorb fully, and then applying your retinol or vitamin C product — the peptide layer helps reduce the irritation from those stronger actives while adding its own firming and smoothing benefits.

If you use a retinol or retinal serum and struggle with the dryness or sensitivity, this is a genuinely practical fix.

Perfect for:

• Anyone with multiple skin concerns at once — fine lines, texture, pores, tone, and firmness
• Sensitive skin (fragrance-free, essential-oil-free)
• Retinol and vitamin C users who want to reduce irritation
• Anyone building a peptide-focused, science-backed routine
• People who like a simple routine — this multitasks in one step
• COSRX fans — layers beautifully with the Advanced Snail 96 Essence and 5 PDRN B5 Toner
• All skin types, all ages — early prevention through mature skin

How to use:

1. After cleansing, use as the first step of your routine (before toner, serum, or ampoule).
2. Dispense a few pumps and spread over the entire face, patting gently to absorb.
3. Optional: apply several layers to amplify the effect of the product that follows.
4. Allow to absorb fully, then continue with your serum, ampoule, and moisturizer.
5. Use morning and evening.
6. If layering with retinol or vitamin C: let this serum absorb completely first, then apply the active.
7. AM: always finish with broad-spectrum SPF 30+.

Product Details:

• Brand: COSRX
• Product: The 6 Peptide Skin Booster Serum
• Size: 150 ml / 5.07 fl oz (pump bottle)
• Form: Booster Serum (toner-like texture)
• Key Ingredients: SH-Polypeptide-121, Copper Tripeptide-1 (GHK-Cu), Dipeptide Diaminobutyroyl Benzylamide Diacetate, Oligopeptide-68, Palmitoyl Tripeptide-8, Acetyl Hexapeptide-8, Niacinamide, Adenosine, Sodium Hyaluronate, Allantoin
• Skin Type: All — including Sensitive, Combination, Mature
• Features: Fragrance-Free, Essential-Oil-Free, Cruelty-Free, Korean Beauty (K-Beauty), Clinically Tested
• Country of Origin: Made in South Korea

Shipping & Returns:
Ships within 1 business day, securely packaged to protect the pump bottle. Returns accepted per the policy listed above. Send a message before buying if you have any questions and I'll respond quickly.