COSRX
COSRX The 6 Peptide Skin Booster Serum, 150ml
COSRX The 6 Peptide Skin Booster Serum, 150ml
Rated 5.00 out of 7.0 by Japan’s largest beauty community
Addresses a variety of skin concerns
✓ 100% AUTHENTIC, SHIPS FROM JAPAN
✓ DUTIES & TAXES INCLUDED FOR US ORDERS
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What it is
Ingredients
Water, DPG, Glycerin, Pentylene Glycol, 1,2-Hexanediol, Niacinamide, Acetyl Hexapeptide-8, Copper Tripeptide-1, Synthetic Human Recombinant Polypeptide-121, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Oligopeptide-68, Palmitoyl Tripeptide-8, Acetylglucosamine, Adenosine, Alanine, Allantoin, Arginine, Glycine, Glutamic Acid, Hydrogenated Lecithin, Serine, Soybean Oil, Tocopherol, Threonine, Sodium Lactate, Sodium Hyaluronate, Proline, Betaine, Polyquaternium-51, Lysine HCl, PCA, PCA-Na, (Acryloyldimethyltaurate Ammonium/VP) Copolymer, Ethylhexylglycerin, Sodium Oleate, Caprylyl Glycol, Citric Acid, Xanthan Gum, Dextran, Polyacrylate Crosspolymer-6, BG, EDTA-2Na, t-Butanol, Potassium Sorbate
How to use
1. Use at night after washing your face and preparing your skin with lotion, etc. 2. Place the sheet on the area of concern and make sure it adheres to the skin. 3. After 5 minutes, remove the sheet, pat the remaining serum into your skin with your palms, and then moisturize thoroughly with serum, lotion, cream, etc. It is recommended to use it once a week. *Avoid using around the eyes and mouth. *The tingling or prickling sensation varies from person to person. If you are sensitive to this, adjust the number of sheets used or the frequency of use, or refrain from using it. *A tingling sensation may remain the next morning. *Be careful not to touch around your eyes or mouth with the hands that have removed the sheet.
We ship internationally from Japan!
Frequently Asked Questions
Is this authentic?
Yes. We only buy from official retailers and directly from the brands here in Japan. Never resellers, never grey market stock.
We are beauty lovers too, so we know the worry, especially with something you are putting on your face. Authenticity is 100% guaranteed by us.
What are your shipping rates?
On orders under US$75, shipping is a flat US$20 to the United States and US$10 to all other countries.
Orders of US$75 or more ship free, applied automatically at checkout. Your exact shipping cost is shown before you pay.
How long does delivery take?
These estimates are for International Airmail (Tracked) and include 3 to 5 business days of processing in Japan.
- United States: 12 to 15 business days
- Canada, United Kingdom, France, Germany: 9 to 12 business days
- Australia, New Zealand, Denmark, Finland, India, Indonesia, Italy, Netherlands, Spain, Sweden, Switzerland: 10 to 13 business days
- China, Hong Kong, Malaysia, Singapore, South Korea, Taiwan, Thailand, Vietnam: 8 to 10 business days
- Rest of the world: 11 to 18 business days
Actual delivery can be affected by customs clearance, seasonal congestion, or carrier delays in the destination country, all of which are outside our control.
Do you offer express shipping?
Yes. As of 22 July 2026, we offer International Express Mail through Japan Post. The cost is based on order weight and is calculated automatically at checkout.
Will I pay customs or import fees?
US orders: No. As of July 1, 2026, all US orders ship DDP (duties delivered prepaid), meaning we prepay all import duties on our end. Nothing is due at your door.
Orders outside the US: Possibly. Duties and import taxes are set by your local customs authority and are not collected at checkout, so any charges on delivery are your responsibility.
We're working on rolling out prepaid duties for more countries soon.