COSRX The 6 Peptide Skin Booster Serum (150ml) - Firming Peptide Toner Serum
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Early Anti-Aging, Simplified: A 6-Peptide Skin Booster
COSRX's The 6 Peptide Skin Booster Serum is a lightweight, toner-like serum that layers six different peptides — including copper peptide (GHK-Cu) — to support firmness and a smoother-looking complexion, making it a gentle entry point into peptide-based anti-aging care.
Its watery-gel texture absorbs quickly, so it can be used generously as a first-step booster without weighing skin down.
Why You'll Love It:
6-Peptide Complex: A blend of peptides, including copper peptide, to support skin firmness and texture.
Lightweight, Fast-Absorbing: A toner-serum hybrid that preps skin without any heaviness.
Early Anti-Aging Focus: Designed for those wanting to start firming care gently and consistently.
Layers Easily: Fits neatly into any routine, morning or night, under serums and moisturisers.
Key Ingredients & Skin Benefits:
Copper Peptide (GHK-Cu): A well-studied peptide associated with supporting skin firmness and renewal.
Multi-Peptide Complex: Five additional peptides work alongside copper peptide to support smoother-looking texture.
How to Use:
When to Apply: After cleansing, as a first-step booster/toner.
Application: Pour a generous amount into hands or a cotton pad and sweep or pat over the face.
Layer: Follow with your regular serum and moisturiser.
Product Specifications:
Brand: COSRX
Volume: 150 ml / 5.07 fl. oz.
Skin Type: Suitable for all skin types
Country of Origin: South Korea (100% Authentic K-Beauty)
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Shipping & Return
Shipping & Return
Shipping: Free UK shipping on orders over £30 (flat rate of £3.95 below that). Orders are processed within 1-2 business days and typically arrive within 3-5 business days.
Returns: Unopened, unused items can be returned within 14 days of delivery for a full refund. Damaged, faulty or incorrect items are replaced or refunded at no extra cost — just contact us within 48 hours of delivery. See our full Refund Policy and Shipping Policy for details.
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Discover more in our FAQ
How long does it take to process an order?
How long does it take to process an order?
Orders are processed within 1-2 business days and typically arrive within 3-5 business days via Royal Mail once dispatched. You'll get a tracking email as soon as your order ships.
Do you ship internationally?
Do you ship internationally?
Right now we ship within the United Kingdom only. Free shipping on orders over £30, and a flat £3.95 fee on orders below that.
What is your return policy?
What is your return policy?
Unopened, unused products can be returned within 14 days of delivery for a full refund. If your item arrives damaged, faulty, or incorrect, contact us within 48 hours and we'll sort a free replacement or refund.
Are your products 100% authentic?
Are your products 100% authentic?
Yes — every product is sourced directly from authorised distributors in South Korea. We never sell dupes, testers, or expired stock.