Multi-Peptide + Copper Peptides 1% Serum

The first thing you notice about The Ordinary's Multi-Peptide + Copper Peptides 1% Serum is the color. It's blue. Not faintly-tinted-if-you-squint blue, but genuinely, visibly blue — a shade somewhere between a robin's egg and a science experiment. The second thing you notice, if you bring the dropper close enough, is the smell. Metallic, faintly biological, like a very clean penny or a steak that's been sitting in a copper pan. Neither of these qualities screams "luxury skincare," and yet this $32 bottle contains more peptide technology than most $150 serums dare to attempt.

The story of copper peptide-1 — or GHK-Cu, as the research papers call it — is one of the more genuinely interesting narratives in cosmetic science. Discovered by biochemist Loren Pickart in the 1970s, GHK-Cu is a naturally occurring tripeptide that declines with age (your body contains about 200 ng/mL at age 20 and roughly 80 ng/mL by age 60). Research has shown it stimulates collagen and glycosaminoglycan synthesis, promotes wound healing, and has antioxidant and anti-inflammatory properties. It's not a marketing invention — it's a biological molecule with decades of published research behind it.

The Ordinary puts GHK-Cu at a declared 1% concentration, which is notable for transparency and ambition. Most brands that include copper peptides use trace amounts — enough to appear on the label, not enough to matter. One percent is a working concentration that places this product in the therapeutic range documented in the research literature.

But this isn't just a copper peptide serum. It's a peptide cocktail. Alongside the GHK-Cu, the formula contains Acetyl Hexapeptide-8 (better known as Argireline, a peptide that reduces expression line depth by modulating neurotransmitter release), Palmitoyl Tripeptide-38 (Matrixyl synthe'6, which stimulates six major structural proteins), the Palmitoyl Tripeptide-1/Tetrapeptide-7 duo (Matrixyl 3000, which boosts collagen while reducing collagen-degrading inflammation), Pentapeptide-18 (which complements Argireline's neuromuscular action), and Dipeptide Diaminobutyroyl Benzylamide Diacetate (Syn-Ake, which mimics the muscle-relaxing effect of waglerin-1 peptide from temple viper venom). Each of these peptides targets a different mechanism of aging — expression lines, structural protein loss, inflammation-driven collagen degradation, and environmental damage. Together, they represent a multi-pronged approach to skin aging that's as comprehensive as anything available without a prescription.

The supporting cast deserves mention. Lactococcus Ferment Lysate sits high in the INCI, providing a probiotic-derived matrix of amino acids and peptide fragments that support the skin's repair processes. A full amino acid complex (eleven amino acids plus NMF components like urea, sodium PCA, and sodium lactate) replenishes the skin's natural moisturizing factor. Dual-form hyaluronic acid (standard sodium hyaluronate plus the sustained-release crosspolymer) provides immediate and long-lasting hydration. This isn't a bare-bones formula with peptides floating in water — it's a thoughtfully constructed vehicle designed to support the actives and the skin simultaneously.

In use, the serum applies cleanly. The texture is lightweight and aqueous, with enough slip to spread easily without any oily or sticky residue. The blue tint doesn't transfer to skin or clothing. The metallic scent fades within minutes. Under moisturizer and sunscreen, it layers without pilling for most users — though a significant minority reports that certain moisturizer formulations cause balling, which suggests some silicone or polymer incompatibility.

Results from peptides are inherently gradual. This is not a product that delivers overnight transformation or even two-week visible changes beyond improved hydration. Peptides work by signaling biological processes — collagen synthesis, glycosaminoglycan production, structural protein assembly — that operate on cellular timelines measured in weeks and months. Expect meaningful fine-line reduction at four to eight weeks and firmness improvements at eight to twelve weeks of consistent twice-daily use. Users who stick with it generally report genuine satisfaction; those who expect acid-like immediate results are consistently disappointed.

The most significant practical limitation is the conflict list. Copper peptides cannot be used with direct acids, L-ascorbic acid vitamin C, retinoids, or strong antioxidants like EUK 134. For many people, this means reorganizing their entire routine to accommodate one product. If you use a vitamin C serum in the morning and retinoid at night — a common and effective protocol — there's literally no slot in which copper peptides fit without sacrificing something else. This restriction alone makes this product a poor choice for people with established, effective routines unless they're willing to restructure around it.

Some users with sensitive skin report itching, redness, or burning — likely a response to the copper ions, which can be irritating at higher concentrations. If you have reactive skin, patch test carefully and introduce gradually.

At $32, this is The Ordinary's most expensive product by a significant margin — more than three times the cost of most items in their lineup. But context matters. Comparable multi-peptide formulations with copper tripeptide-1 at 1% typically run $80-200 from competitors. The Ordinary's version contains more peptide technologies than most of those competitors include, in a more comprehensive formula. If you've decided that peptide-based anti-aging is your approach, this is objectively the best value in the category.

The Multi-Peptide + Copper Peptides 1% Serum isn't for everyone. It requires patience, routine restructuring, and acceptance of a peculiar smell and color. But for those willing to work with its requirements, it delivers a peptide payload that has no equal at this price point. The blue serum that smells like pennies might just be the most underrated product in The Ordinary's entire range.

Formula

The Science

Copper Tripeptide-1 (GHK-Cu) has one of the more substantial research bodies among cosmetic peptides. Discovered by Loren Pickart, GHK-Cu is a naturally occurring tripeptide that declines significantly with age. A comprehensive review by Pickart et al. published in the International Journal of Molecular Sciences (2012) documented GHK-Cu's ability to stimulate collagen synthesis in human dermal fibroblasts, promote glycosaminoglycan production, and exhibit antioxidant activity by modulating iron and copper ion levels that would otherwise catalyze free radical generation.

The Matrixyl peptides in this formula have their own clinical backing. A study on Palmitoyl Tripeptide-38 (Matrixyl synthe'6) published by Sederma demonstrated that the peptide stimulates synthesis of six major components of the skin matrix and dermal-epidermal junction — collagen I, III, and IV, fibronectin, hyaluronic acid, and laminin-5. This broad matrix stimulation complements the more focused collagen-synthesis action of GHK-Cu.

Acetyl Hexapeptide-8 (Argireline) targets a different aging mechanism entirely. A study published in the International Journal of Cosmetic Science (2002) by Blanes-Mira et al. demonstrated that this peptide modulates SNARE complex formation, reducing the exocytosis of catecholamines at the neuromuscular junction. The practical result is decreased muscle contraction intensity in expression-line areas — a topical approach to the same dynamic wrinkle mechanism that injectable neurotoxins target, though at far lower efficacy.

The combination of these peptide technologies in a single formula represents a multi-target approach to skin aging: GHK-Cu and Matrixyl stimulate new structural protein production, Argireline and Pentapeptide-18 reduce expression-line depth, and Matrixyl 3000's anti-inflammatory component (Palmitoyl Tetrapeptide-7) protects existing collagen from degradation. While no clinical trial has validated this specific combination at these concentrations, the individual mechanisms are well-documented and theoretically complementary.

References

1. GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration — BioMed Research International (2015)
2. A synthetic hexapeptide (Argireline) with antiwrinkle activity — International Journal of Cosmetic Science (2002)

Dermatologist Perspective

Dermatologists generally view peptide serums as a reasonable complement to retinoids and sunscreen in an anti-aging regimen, though most emphasize that peptides alone are less potent than retinoids for collagen stimulation. Board-certified dermatologists note that copper tripeptide-1 has a more substantial research basis than most cosmetic peptides, and the 1% concentration in this formula represents a meaningful amount. The multi-peptide approach — targeting expression lines, structural protein loss, and inflammatory collagen degradation simultaneously — is recognized as pharmacologically sound, even if clinical validation of the specific combination is limited. Dermatologists frequently caution patients about the significant interaction restrictions with common actives like vitamin C and retinoids, noting that routine restructuring is essential for safe use.

Guidance

This product evolved from The Ordinary's original 'Buffet + Copper Peptides 1%' — their most complex and expensive serum. The reformulation under the Multi-Peptide name consolidated the peptide technologies, updated the delivery system, and streamlined the formula while retaining the 1% copper tripeptide concentration that set the original apart. It represents The Ordinary's most ambitious attempt to compete with high-end peptide serums at a fraction of the price.

About The Ordinary Established Brand (5–20 years)

The Ordinary launched in 2016 under parent company DECIEM and quickly became one of the most recognized names in affordable, ingredient-focused skincare. While the brand lacks proprietary clinical trials on its specific formulations, it builds products around well-studied actives at transparent concentrations, earning widespread dermatologist acknowledgment.

Brand founded: 2016 · Product launched: 2023

Myth vs. Reality

Myth

Copper peptides replace the need for retinoids.

Reality

Copper peptides and retinoids work through entirely different mechanisms. Retinoids increase cell turnover and directly regulate gene expression for collagen production. Copper peptides signal collagen synthesis through a growth-factor pathway. They're complementary technologies — but cannot be used together in the same routine because copper destabilizes retinoids. Alternate morning and evening if using both.

Myth

The blue color means the product has gone bad.

Reality

The blue color is from the copper tripeptide-1 itself — copper ions naturally produce a blue hue. This is a sign the copper peptide is present and active. The product has gone bad only if the color changes significantly from its original blue shade or develops an unusual smell beyond the expected faint metallic note.

FAQ

Common Praise

"Excellent balance of collagen-supporting and signaling peptides in one formula"

"Smooth, non-oily texture that applies well under moisturizer"

"Noticeable improvement in skin firmness and fine line appearance with consistent use"

"Affordable relative to other multi-peptide and copper peptide serums on the market"

Common Complaints

"Minimal visible results reported by some users even after extended use"

"Tendency to pill when layered under certain moisturizers"

"Some users experience itching, redness, or burning — particularly those with sensitive skin"

"Distinctive meat-like odor from the copper peptides that some find unpleasant"

"Extensive use restrictions limit what other actives can be used alongside it"

Notable Endorsements

Noted by skincare experts for offering professional-grade peptide technology at an accessible price point

Appears In

best serum for aging best peptide serum best serum for dullness best affordable copper peptide serum

Related Conditions

aging dullness texture dryness

Related Ingredients

peptides ghk cu hyaluronic acid