Last updated June 2026. Educational content, not medical advice. Consult a licensed dermatologist or clinician before changing your skincare or hair-care routine.

Short answer: Yes, with conditions. The Ordinary’s Multi-Peptide + Copper Peptides 1% skin serum (previously called “Buffet + Copper Peptides”) packs nine clinically studied peptide ingredients into a $32 bottle, including 1% GHK-Cu, Acetyl Hexapeptide-8, and three Matrixyl-family peptides, delivering real but modest anti-aging support at a price that undercuts nearly every branded competitor. The Multi-Peptide Serum for Hair Density is a separate, similarly priced product built for scalp use. Both are worth buying for the right person. Neither is a replacement for prescription actives when those are indicated.

Wait, which “Multi-Peptide Serum” do you actually mean?

This is the first question to answer, because The Ordinary sells two very different products under the Multi-Peptide name, and search results jumble them constantly.

Multi-Peptide + Copper Peptides 1% (formerly “Buffet + Copper Peptides”) is a face serum targeting wrinkles, firmness, and elasticity. It retails for $32.00 for 30 mL and has a recognizable blue tint from the copper ions. This is what most people mean when they ask “is the Ordinary multi-peptide serum good?” in a skincare context.

Multi-Peptide Serum for Hair Density is a leave-in scalp treatment retailing for roughly $22 for 60 mL, built around REDENSYL, Procapil, CAPIXYL, BAICAPIL, and AnaGain. It is completely different in mechanism and is designed to be applied to the scalp, not the face.

Both products exist in the same brand ecosystem and both use “multi-peptide” in the name. This article covers both, but the skin serum gets the deeper treatment because it is the more commonly searched one.

What is actually in the Multi-Peptide + Copper Peptides 1% skin serum?

This is where The Ordinary earns its reputation, and also where the caveats start. Nine active technologies in one serum sounds impressive, and the ingredient list is genuinely well-constructed for the price. Here is what each one does.

Copper Tripeptide-1 (GHK-Cu) at 1% is the headline ingredient. GHK-Cu is a naturally occurring copper-binding tripeptide first identified in human plasma. A 12-week facial study by Leyden and colleagues applied a GHK-Cu cream twice daily to 71 women with mild to advanced photoaging and found improved skin laxity, clarity, and firmness, reduced fine lines and wrinkle depth, increased skin density and thickness, and reduced mottled pigmentation. A companion 12-week study on 41 women with photoaged eye-area skin found GHK-Cu eye cream outperformed both placebo and vitamin K cream for reducing periorbital lines and improving skin density. It is the most research-backed ingredient in the formula and the main reason to choose this version over the original “Buffet.”

Acetyl Hexapeptide-8 (Argireline) is the so-called “topical Botox” peptide, though that nickname overpromises. It works by competing with SNAP-25, a protein in the SNARE complex, to modulate acetylcholine release at the neuromuscular junction, which softens repetitive facial muscle contractions over time. Controlled clinical studies have shown up to 30% reduction in periorbital wrinkle depth after 28 to 30 days of topical Argireline at 10%. The concentration in this serum is not disclosed, which is a real limitation.

Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7, and Palmitoyl Tripeptide-38 are the Matrixyl family. Palmitoyl Tripeptide-38, sold commercially as Matrixyl Synthe’6, stimulates synthesis of six major matrix constituents including collagen I, III, IV, fibronectin, hyaluronic acid, and laminin-5. A 2024 study in Skin Research and Technology by Yang and colleagues evaluated a multi-component formulation containing Palmitoyl Tripeptide-1 and Palmitoyl Tetrapeptide-7 and demonstrated significant fibroblast proliferation and collagen and elastin synthesis stimulation. These three peptides working together represent a solid collagen-support stack.

Pentapeptide-18 and Dipeptide Diaminobutyroyl Benzylamide Diacetate (SYN-AKE) are relaxant peptides with mechanisms similar to Argireline. SYN-AKE mimics waglerin-1, a compound from Temple Viper venom, to block acetylcholine receptors; the research is limited but intriguing.

Lactococcus Ferment Lysate is a postbiotic that supports the skin microbiome and has anti-inflammatory properties.

Sodium Hyaluronate in multiple forms provides layered hydration from the skin surface to deeper layers.

The formula pH sits at 6.0 to 7.0, which is slightly higher than the physiological ideal of 4.5 to 5.5. That matters because a more alkaline environment can accelerate peptide hydrolysis, potentially degrading active peptides before they reach target skin layers.

The absorption problem nobody talks about at the drugstore

Here is the insider truth that most peptide serum marketing leaves out entirely.

Peptides face a fundamental skin-penetration challenge: the “500 Dalton rule.” Research consistently shows that molecules above roughly 500 Da struggle to cross the stratum corneum barrier autonomously. Most cosmetic peptides, including GHK-Cu and the Matrixyl family, sit above that threshold. A 2025 review in the Journal of Cosmetic Dermatology confirmed that penetration enhancers, lipid bilayer disruption, and carrier-vehicle design are the primary levers that separate effective transdermal peptide delivery from an expensive rinse.

The Ordinary addresses this partly via lipid-conjugation in the palmitoyl peptides (the “palmitoyl” fatty-acid chain improves membrane affinity and uptake) and via Dimethyl Isosorbide in the formulation, which acts as a penetration enhancer. It also uses Hydroxypropyl Cyclodextrin as a carrier for GHK-Cu. These are the right tools, but clinical testing results for this specific product are not publicly available, which means performance is inferred from ingredient science rather than product-level trial data.

Personally, I would still use this serum, because the ingredient selection is defensible and the price makes the uncertainty tolerable. Do not believe any brand, including premium ones at five times the price, that claims definitive clinical proof for their specific multi-peptide formula when those trials are not published in peer-reviewed journals. Almost none of them are.

How does The Ordinary Multi-Peptide Serum compare to the competition?

At $32 for 30 mL, it undercuts almost every branded copper-peptide option.

Product Key Peptide(s) Price per 30 mL GHK-Cu % disclosed? pH disclosed?
The Ordinary Multi-Peptide + Copper Peptides 1% GHK-Cu 1%, Argireline, 3x Matrixyl family $32 Yes, 1% Yes, 6.0-7.0
NIOD Copper Amino Isolate Serum 3:1:1 (CAIS3) GHK-Cu isolate, concentrated ~$80+ for 15 mL Partially Not disclosed
Paula’s Choice Pro-Collagen Multi-Peptide Booster Palmitoyl tripeptide-1, -3, -5 ~$45 for 20 mL No copper Not disclosed
SkinMedica TNS Advanced+ Growth factors + peptides ~$350 for 28 g No No

The clear winner on value is The Ordinary. NIOD (also a Deciem brand) uses a more concentrated and specifically isolated copper peptide complex, which likely outperforms on the GHK-Cu axis, but at a price point most people cannot sustain. SkinMedica TNS Advanced+ has published physician-backed clinical data but costs over 10x as much.

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What about the hair density serum? Is that any good?

The Multi-Peptide Serum for Hair Density sits in a different category and deserves a direct answer. At around $22 for 60 mL, it contains six trademarked actives: REDENSYL, Procapil, CAPIXYL, BAICAPIL, AnaGain, and high-solubility caffeine.

REDENSYL, the most-studied of the group, targets DHLA (dihydrolipoic acid), which stimulates hair follicle stem cells. A 2019 comparative study published by Hilaris found the RCP (Redensyl, Capixyl, Procapil) combination showed significantly better clinical recovery in terms of hair growth than topical 5% minoxidil in a sample of over 50 men per group. That is a striking result. It also comes with a significant caveat: almost all the research on these trademarked ingredients was conducted or funded by the companies that hold the patents on them. No large-scale independent, peer-reviewed randomized controlled trial has confirmed the effect.

A practical note from real-world testing: Today.com editors testing the serum for eight weeks reported above-average hair growth of roughly 1.75 inches across that period, versus an average of about 0.5 to 1 inch per month for most people. The serum is fragrance-free, absorbs without a trace, and tolerates well even on sensitive scalps.

Here is where I land: the hair density serum is worth trying if you have mild diffuse thinning and you cannot or will not use minoxidil. It is not a replacement for prescription finasteride or minoxidil if androgenic alopecia is confirmed by a dermatologist or trichologist. The price is low enough that the experiment costs less than one follow-up appointment.

The layering rules The Ordinary’s own website buries

Most people get less from their peptide serum than they should, not because the formula is bad but because they layer it wrong. These rules apply to the skin serum specifically.

Do not mix with direct acids or L-ascorbic acid vitamin C in the same application. A low pH environment from acids or ascorbic acid accelerates peptide hydrolysis, which means the actives break down before they can work. The Ordinary explicitly confirms this: use vitamin C in the morning and peptides in the evening, or on alternate days.

Apply on slightly damp skin after cleansing, before oils and creams. The multi-peptide serum is water-based. Applying it onto a dry face is fine, but layering it under a hydrating toner or mist first can help with absorption. Applying it after an oil or cream essentially buries it.

You can layer retinol on top in the PM routine. Peptides and retinoids do not conflict. The Ordinary recommends the peptide serum in the Treat step, followed by retinol.

The copper serum should not share a session with pure vitamin C (L-ascorbic acid). Copper ions oxidize ascorbic acid, degrading the vitamin C before it can act. This is chemistry, not brand policy.

One more thing: the blue tint fades within a minute of application on most skin tones. If you are patch-testing, do it on your inner forearm for 24 hours first. A small subset of users report a metallic smell that lingers for several hours, which is documented in independent reviews and worth knowing before you apply it before a meeting.

When the serum is enough, and when it is not

The Multi-Peptide + Copper Peptides 1% is the right choice for:

  • Maintenance anti-aging from your late 20s or 30s onward, when collagen production starts declining (roughly 1% per year after age 25).
  • Mild dynamic lines (forehead, crow’s feet) where a relaxant peptide like Argireline has its best evidence.
  • Hydration and barrier support with a side of anti-aging signaling.
  • Anyone who has been using the original “Buffet” serum and wants the copper-peptide upgrade at the same price tier.

It is not the right primary tool for:

  • Moderate to deep static wrinkles, which require either prescription retinoids, in-office procedures, or both.
  • Significant photoaging, where the evidence base points to tretinoin, niacinamide, and sunscreen as the proven cornerstones.
  • Active inflammatory skin conditions. The GHK-Cu has anti-inflammatory properties but is not a treatment for rosacea, acne, or eczema.

Myth worth busting directly: peptides do not “replace” collagen by going into your skin and turning into collagen. They act as signaling molecules that prompt fibroblasts to upregulate their own collagen production. The effect is real but indirect and cumulative over weeks and months, not days. Anyone claiming visible collagen rebuilding in 72 hours is selling a timeline the biology does not support.

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Who should buy each version?

You are… Recommended pick Why
30s-40s, first anti-aging serum, budget-conscious Multi-Peptide + Copper Peptides 1% Best peptide density per dollar, low risk
Concerned about mild hair thinning, scalp-focused Multi-Peptide Serum for Hair Density Trademarked actives, no prescription needed
Already using tretinoin or retinoids Multi-Peptide + Copper Peptides 1% in AM Peptides + prescription retinoid = strong synergy
Managing moderate to deep wrinkles Start with a derm, add peptide serum for maintenance Peptides alone will underperform expectations
Sensitive skin, patch-test-first person Multi-Peptide + Copper Peptides 1%, fragrance-free No added fragrance, well-tolerated by most
Wants maximum copper peptide potency NIOD CAIS3 (same parent brand, higher concentration) Costs more, but copper complex is more concentrated

Frequently asked questions

Is The Ordinary Multi-Peptide Serum the same as the “Buffet” serum?
Not exactly. The Ordinary renamed its original Buffet serum to Multi-Peptide + HA, and the Buffet + Copper Peptides version became Multi-Peptide + Copper Peptides 1%. The formulas are the same as the products they replaced, just with clearer names. If you were buying “Buffet + Copper Peptides,” you are now buying Multi-Peptide + Copper Peptides 1%.

Can I use The Ordinary Multi-Peptide Serum twice a day?
Yes. The Ordinary recommends AM and PM use. The only adjustment is to avoid applying it in the same session as direct acids or vitamin C, which degrade peptides via pH conflict or oxidation. A common setup is peptide serum in the PM with retinol on top, and vitamin C in the AM.

Does The Ordinary Multi-Peptide Serum work for hair loss?
The hair density serum may help with mild diffuse thinning, based on limited but promising clinical data for REDENSYL and the RCP complex. It is not clinically validated for androgenic alopecia (pattern baldness) and is not a replacement for minoxidil or finasteride when those are indicated.

Why does The Ordinary Multi-Peptide + Copper Peptides 1% have a blue color?
The blue tint comes from copper ions in the GHK-Cu complex. Copper forms a characteristic blue-green color in aqueous solution. The tint fades within seconds to a minute of application and does not stain skin.

Can I use peptides with retinol?
Yes, and the combination is synergistic. Retinoids accelerate cell turnover and can cause temporary irritation and barrier disruption; peptides, particularly GHK-Cu, have anti-inflammatory and wound-repair properties that can help offset some of the initial retinoid adjustment. Apply the peptide serum first, let it absorb, then apply your retinoid.

How long before I see results from the Multi-Peptide Serum?
Realistic timeline for visible change: skin hydration and smoothness improve within 2 to 4 weeks. Fine-line softening from relaxant peptides like Argireline shows up around 4 weeks. Meaningful collagen-signaling effects from GHK-Cu and Matrixyl peptides take 10 to 12 weeks of consistent use, matching the clinical study timelines in the published literature.

What should I not mix with The Ordinary Multi-Peptide + Copper Peptides 1%?
Avoid using it in the same routine as direct acids (AHAs, BHAs), L-ascorbic acid vitamin C, resveratrol, and pure vitamin C derivatives with low pH. Mixing copper ions directly with vitamin C also causes oxidation. These are not dangerous combinations, just wasteful ones that degrade the actives before they can work.

Author: Vital Signs Today Editorial Team, [credential]”]. Educational content, not medical advice. Sources linked inline.

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