# COSRX The 6 Peptide Skin Booster Serum 6 Peptide skin booster serum, 150 ml, with Niacinamide. - Brand: COSRX - Product: The 6 Peptide Skin Booster Serum - Price: $24.99 - Availability: Out of stock - Size: 150ml - Market: Korean market, the version sold in Korea - Made in: Republic of Korea - EAN (barcode): 8809598455658 - Category: Serums & Ampoules ## Key benefits - Six named peptides run back to back at entries seven through twelve, exactly matching the count in the product name - Niacinamide leads directly into the peptide stack at entry six - Allantoin and sodium hyaluronate cushion the peptide stack immediately behind it - Lightweight, fast-absorbing texture built to layer, not to replace a heavier step - COSRX runs its own brand-portal verification: enter the batch number and expiry from your unit on cosrx.com - Sourced for the Korean market, Korean barcode 8809598455658 intact on the box ## How it works A booster serum is something you add to a routine that already works, and the name here is the idea: peptides, in a light water-based fluid. It goes on after toner and before moisturizer, morning and evening, pressed in with flat palms on damp skin. Skin that looks tired and flat by the evening is the case it fits, and peptide work is cumulative rather than overnight. It layers under anything else already in the routine, which is what a booster is for. Twice a day, every day, on the neck as well as the face. ## How to use 1. Use the 6 Peptide Skin Booster Serum after toner and before moisturizer, morning and evening. 2. Three or four drops for the face and neck, pressed in with flat palms rather than rubbed around. 3. Toner first, this second, then moisturizer over the top, and sunscreen last in the morning. 4. Twice a day, every day. Do not swap it in for your moisturizer; a booster is a layer under one rather than a replacement for it. ## Ingredients 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 ## FAQ ### What are the six peptides in this booster serum and where do they sit on the list? Six named peptides run back to back at entries seven through twelve: acetyl hexapeptide-8, copper tripeptide-1, sh-polypeptide-121, dipeptide diaminobutyroyl benzylamide diacetate, oligopeptide-68 and palmitoyl tripeptide-8. Niacinamide leads directly into that run at entry six, and adenosine appears further down the list as an additional actives layer. The count in the product's name matches the count of distinct peptide ingredients actually on the label. ### Is a peptide serum like this suitable for sensitive or first-time peptide users? The ingredient list contains no fragrance, essential oil, silicone, paraben, sulfate surfactant, mineral oil or added colourant, which is a relatively low-irritation profile for a first peptide product. Allantoin and sodium hyaluronate sit near the peptide stack for comfort and hydration, and a wide amino acid set rounds out the formula. Peptides themselves are not typically irritating, but as with any new step, introducing it gradually is the safer approach. ### How long does it take to see a difference from a peptide serum? Peptides work by supporting skin's ongoing processes rather than producing an immediate visible change, so the honest expectation is weeks of consistent use before firmness or texture reads differently. Niacinamide, positioned just ahead of the peptide stack, tends to show its evening effect on a similar timeline. Using the serum inconsistently will simply slow that timeline rather than causing harm. ### Can this peptide serum be layered under a retinoid or brightening product? This serum's list is built from peptides, amino acids and humectants, with nothing that would inherently conflict with a separate retinoid or brightening step used elsewhere. A common approach is to apply this serum first on clean skin, let it settle, then follow with a treatment product and moisturizer. Confirm the exact order against whatever other product's own instructions you are using. ### How do I know my bottle is the genuine Korean-market version of this serum? The barcode on this unit, 8809598455658, is the original Korean-market code, kept intact rather than covered by a domestic sticker. COSRX verifies units through its own system: locate the batch-check page on cosrx.com and enter the batch number and expiration date exactly as printed on your box, since reading those numbers directly off your own unit rather than trusting a seller's claim is the whole point of that check. --- Page: https://korean-pharmacy.com/products/cosrx-the-6-peptide-skin-booster-serum