How does Liquid Peptides compare to The Ordinary's Buffet + Copper Peptides?

Similar mechanism-coverage strategy — multi-peptide stack. Medik8 uses a proprietary fluid base that absorbs faster; The Ordinary's Buffet is heavier. Per-peptide concentrations are comparable but not published in detail by either brand. Buffet is ~3× cheaper.

Can I use this morning and night?

Yes — that's the recommended cadence. Because it's peptide-based (no retinoids, acids, or actives that sensitize skin), there's no photosensitivity concern.

serum30ml

Liquid Peptides

Name: Liquid Peptides
Brand: Medik8
Price: 79 USD
Availability: InStock

Medik8

Liquid Peptides is Medik8's 'peptide cocktail' approach — combining Argireline (expression-line reduction), copper tripeptide (collagen stimulation), and a Matrixyl-adjacent signal peptide complex in a water-light formulation. Medik8 positions this as the daytime counterpart to a retinoid routine, arguing that peptides and retinoids work on complementary pathways: retinoids drive cell turnover, peptides drive matrix-protein synthesis. Clinical testing by the brand shows measurable wrinkle-depth reduction at 8 weeks. Higher price point than The Ordinary's single-peptide options — the trade is broader mechanism coverage for the convenience of one bottle.

Buy on Dermstore$79 Buy on LookFantastic£65

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Peptides in this product

Argireline (Acetyl Hexapeptide-8)

Expression-line softening

GHK-Cu (Copper Tripeptide-1)

Collagen synthesis

Matrixyl 3000 (Palmitoyl Tripeptide-1 + Palmitoyl Tetrapeptide-7)

Wrinkle-depth reduction

Targets

Peptides for Anti-Aging Peptides for Skin & Glow

Key ingredients

Acetyl Hexapeptide-8Copper Tripeptide-1Palmitoyl Tripeptide-1Hyaluronic Acid

How to use

Apply 2-3 drops AM and PM on clean skin before moisturizer. Safe to layer under retinoids in the evening routine. Results typically start showing at 4-6 weeks of consistent use.