Thirty-two dollars is the most The Ordinary will ask you to spend on a single product, and that pricing context matters. At any other brand, a serum containing 1% GHK-Cu copper peptide alongside seven additional peptides, a probiotic ferment, a complete amino acid complex, and dual-weight hyaluronic acid would command a price tag north of a hundred dollars. The Ordinary's version costs less than most competitors charge for a basic vitamin C serum. The blue liquid in this dropper bottle is quietly one of the most audacious value propositions in skincare.
The star ingredient is copper tripeptide-1, also known as GHK-Cu — a naturally occurring peptide complex that has been the subject of genuinely impressive published research. Unlike many peptides whose evidence rests primarily on manufacturer-sponsored studies and cell culture models, GHK-Cu has a substantial body of independent peer-reviewed literature documenting its ability to stimulate collagen and elastin production, promote wound healing, attract immune cells for tissue remodeling, and act as an antioxidant. At 1% concentration, this formula provides GHK-Cu at a dose consistent with the published research.
Surrounding the copper peptide is a seven-member supporting cast that reads like a who's who of peptide skincare. Palmitoyl tripeptide-1 and palmitoyl tetrapeptide-7 form the commercially known Matrixyl 3000 combination, proven to stimulate collagen production. Palmitoyl tripeptide-38 (Matrixyl Synthe'6) targets six components of the skin matrix. Acetyl hexapeptide-8 (Argireline) targets expression lines through neurotransmitter modulation. Dipeptide diaminobutyroyl benzylamide diacetate (SYN-AKE) mimics waglerin-1 peptide from temple viper venom to relax muscle tension. It is an ingredient list that seems almost recklessly ambitious for a thirty-two-dollar product.
Lactococcus ferment lysate, listed third in the formula, provides a probiotic dimension that most peptide serums lack entirely. Ferment lysates have been shown to strengthen the skin barrier and support the skin's own immune function — creating a healthier cellular environment for the peptides to do their signaling work. Think of it as preparing the ground before planting.
The hydration system is equally thorough. Eleven amino acids mirror the skin's natural moisturizing factor. Five sugars (trehalose, fructose, glucose, maltose, and the disaccharide trehalose again) provide osmotic hydration. Urea, sodium PCA, PCA, and sodium lactate add additional NMF components. Dual-weight hyaluronic acid — standard sodium hyaluronate and the crosslinked polymer version — provides hydration at the surface and within the stratum corneum. This is not a serum that requires another hydrating product underneath it. It is, by itself, a comprehensive hydration system with peptides built in.
The practical experience starts with the color. This serum is blue — genuinely, noticeably blue — from the copper peptide complex. The first application is a small psychological adventure. You are putting blue liquid on your face and trusting that it will absorb without leaving you looking like you lost a fight with a Smurf. It does absorb, and the blue tint disappears within minutes on most skin tones, but applying too much or not allowing absorption time before bed can leave faint marks on pillowcases.
The texture is thicker and stickier than The Ordinary's lighter water serums. It takes a few minutes to fully absorb and can feel slightly tacky before it does. It's not a criticism but a realistic expectation to set — copper peptide formulations tend to be more viscous than basic hyaluronic acid serums, and the amino acid and sugar complex adds to the density. Once absorbed, the finish is dewy and hydrated without being greasy.
The conflicts list is the product's most significant practical limitation. The Ordinary advises against using this with direct acids (AHA, BHA, azelaic acid at high concentrations), pure vitamin C (L-ascorbic acid and ethylated ascorbic acid), and other strong actives. Copper ions can oxidize vitamin C. Acidic environments destabilize copper peptides. This means if you use this twice daily, you lose the ability to use several popular active categories in the same routine. The workaround — using copper peptides in one routine and acids/vitamin C in the other — is simple but requires planning that more casual skincare users may find annoying.
Some users report mild stinging on first application, particularly on compromised or freshly exfoliated skin. This is a known characteristic of copper peptide products and not a sign of an adverse reaction. It typically resolves within seconds and diminishes with continued use. However, those with genuinely sensitive or rosacea-prone skin should patch test carefully, as copper peptides can exacerbate sensitivity in some individuals.
Results follow the peptide timeline — gradual, cumulative, and dependent on consistent use. The hydration benefits are immediate. Skin texture improvements appear within two to four weeks. The deeper structural effects of GHK-Cu's collagen-stimulating and tissue-remodeling activity become noticeable at eight to twelve weeks. It's not a quick-fix product. It rewards patience and consistency.
The product's value argument is almost absurdly strong. A competing copper peptide serum from a prestige brand might cost a hundred and fifty to two hundred dollars for the same volume with fewer additional peptides. The Ordinary delivers GHK-Cu at 1% alongside seven additional peptides, a probiotic ferment, and a complete NMF complex for a fifth of that price. Even within The Ordinary's own lineup, the regular Buffet (Multi-Peptide Serum without copper) costs seventeen dollars and ninety cents — the fourteen-dollar premium for the copper peptide version is a small price for the most researched signaling peptide in dermatology.
