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[ DemythSkin Verdict ]

Medik8

Medik8 Liquid Peptides Advanced MP

Name: Medik8 Liquid Peptides Advanced MP
Brand: Medik8

SerumAnti-Aging

Efficacy

Strong

4.1 / 5.0

Safety

Safe

4.4 / 5.0

System Verdict

This is a genuinely high-tech peptide bomb with strong anti-aging potential, but it’s more of a sophisticated support serum than a complete all-round treatment. The efficacy score is driven by the very high density and diversity of well-studied signaling peptides (including Matrixyl-type peptides, copper peptides and expression-line-targeting neuropeptide analogues) sitting high in the INCI within a hydrating, silicone-gel base; however, the formula lacks gold-standard actives like retinoids or a dedicated, proven brightening system and instead focuses almost entirely on collagen, texture and fine-line pathways, so its impressive clinical marketing claims remain largely peptide-dependent rather than backed by multiple cornerstone actives.

Active Ingredients Detected

A Tier: Good BasicsProven Results

GlycerinTocopherolSodium HyaluronatePanthenolHelianthus Annuus (Sunflower) Seed Oil

B Tier: Supporting IngredientsPromising Ingredients

Dimethyl IsosorbideUndecaneInulinTridecaneHydroxyacetophenonePalmitoyl Tripeptide-38Palmitoyl Tripeptide-5Palmitoyl Tripeptide-1PullulanTetrapeptide-21Palmitoyl Tetrapeptide-10Palmitoyl Tetrapeptide-7Ammonium Polyacryloyldimethyl TaurateGlyceryl LinoleateAcetyl Hexapeptide-8Pentapeptide-18Sucrose PalmitateCetyl PalmitateCopper Palmitoyl Heptapeptide-14Heptapeptide-15 PalmitateBenzotriazolyl Dodecyl P-CresolCarnosineHydroxypropyl CyclodextrinPantolactoneGlyceryl CaprylatePolyvinyl Alcohol

C Tier: Marketing IdolsHype | Limited or Weak Data

Oligopeptide-1Dunaliella Salina Extract

D Tier: Potential IrritantsBe Cautious

T-Butyl AlcoholPhenylpropanol

What Each Ingredient Does

Water: Solvent
Glycerin: Humectant for hydration
Dimethicone: Silicone emollient, skin feel
Dimethyl Isosorbide: Solvent, penetration helper
Butylene Glycol: Humectant and solvent
Undecane: Light emollient, texture agent
Arginine: Amino acid, pH buffer
Inulin: Prebiotic, humectant
Microcrystalline Cellulose: Suspending agent, texture
Ceteareth-20: Emulsifier, surfactant
Tridecane: Emollient, slip enhancer
Tocopherol: Antioxidant (vitamin E)
Hydroxyacetophenone: Antioxidant, preservative booster
Sodium Hyaluronate: Hyaluronic acid humectant
Palmitoyl Tripeptide-38: Peptide, anti-aging signaling
Panthenol: Humectant, soothing provitamin B5
Caprylic/Capric Triglyceride: Emollient, skin-softening
Palmitoyl Tripeptide-5: Peptide, collagen-supporting
Polyacrylate Crosspolymer-6: Gel-forming thickener
Palmitoyl Tripeptide-1: Peptide, skin-conditioning
Pullulan: Film-former, tightening effect
Tetrapeptide-21: Peptide, skin-conditioning
Palmitoyl Tetrapeptide-10: Peptide, skin-conditioning
Palmitoyl Tetrapeptide-7: Peptide, anti-aging support

Full Ingredient List (INCI)

Water, Glycerin, Dimethicone, Dimethyl Isosorbide, Butylene Glycol, Undecane, Arginine, Inulin, Microcrystalline Cellulose, Ceteareth-20, Tridecane, Tocopherol, Hydroxyacetophenone, Sodium Hyaluronate, Palmitoyl Tripeptide-38, Panthenol, Caprylic/Capric Triglyceride, Palmitoyl Tripeptide-5, Polyacrylate Crosspolymer-6, Palmitoyl Tripeptide-1, Pullulan, Tetrapeptide-21, Palmitoyl Tetrapeptide-10, Palmitoyl Tetrapeptide-7, Ammonium Polyacryloyldimethyl Taurate, Glyceryl Linoleate, Acetyl Hexapeptide-8, Pentapeptide-18, Oligopeptide-1, Arginine/Lysine Polypeptide, Sucrose Palmitate, Cetyl Palmitate, Phenoxyethanol, Ethylhexylglycerin, Carbomer, Copper Palmitoyl Heptapeptide-14, Heptapeptide-15 Palmitate, Benzotriazolyl Dodecyl P-Cresol, Polysorbate 80, Sorbitan Stearate, Polysorbate 20, Carnosine, Sodium Metabisulfite, Dunaliella Salina Extract, Helianthus Annuus (Sunflower) Seed Oil, Hydroxypropyl Cyclodextrin, Dimethicone/Vinyl Dimethicone Crosspolymer, Sodium Benzoate, Hydrogenated Lecithin, Caprylyl Glycol, Pantolactone, Xanthan Gum, Disodium EDTA, T-Butyl Alcohol, Potassium Sorbate, Citric Acid, Glyceryl Caprylate, Lactic Acid/Glycolic Acid Copolymer, Polyvinyl Alcohol, Phenylpropanol.

Frequently Asked

Is Medik8 Liquid Peptides Advanced MP worth it?

Medik8 Liquid Peptides Advanced MP scores 4.1 out of 5.0 for efficacy (Strong) and 4.4 out of 5.0 for safety (Safe) on DemythSkin's independent ingredient analysis. This is a genuinely high-tech peptide bomb with strong anti-aging potential, but it’s more of a sophisticated support serum than a complete all-round treatment. The efficacy score is driven by the very high density and d

What are the key active ingredients in Medik8 Liquid Peptides Advanced MP?

Medik8 Liquid Peptides Advanced MP contains no gold-standard actives — its formula is built on supporting and base ingredients rather than clinically transformative actives.

Does Medik8 Liquid Peptides Advanced MP contain fragrance or known irritants?

DemythSkin flags these ingredients in Medik8 Liquid Peptides Advanced MP as potential irritants: T-Butyl Alcohol, Phenylpropanol.

How is Medik8 Liquid Peptides Advanced MP scored?

DemythSkin grades every product on two independent axes: efficacy (whether the ingredients have clinical evidence of working) and safety (irritation and sensitisation risk). Ingredients are classified S through D against a database of over 3,000 compounds. No brand pays for a score.

Analyze on DemythSkin →

Analysis last updated: 2026-08-07. DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score.