medik8 Liquid Peptides (2021)

Ingredients overview

Label order. Colour is our internal rating: green routine, yellow restricted or worth a look, red prohibited or high-risk, grey not yet decoded.

Ingredients are listed in label order; the order reflects the label only, not exact concentrations.

1. Aqua
2. Glycerin
3. Butylene Glycol
4. Inulin
5. Sodium Hyaluronate
6. Panthenol
7. Alpha-Glucan Oligosaccharide
8. Carnosine
9. Carbomer
10. Polysorbate 20
11. Caprylyl Glycol
12. Phenoxyethanol
13. Hydroxypropyl Cyclodextrin
14. Dunaliella Salina Extract
15. Ethylhexylglycerin
16. Citric Acid
17. Palmitoyl Tripeptide-5
18. Sodium Benzoate
19. Acetyl Hexapeptide-8
20. Tetrapeptide-21
21. Pentapeptide-18
22. Palmitoyl Tripeptide-1
23. Pantolactone
24. Palmitoyl Tripeptide-38
25. Palmitoyl Tetrapeptide-7
26. Glyceryl Caprylate
27. Lactic Acid/Glycolic Acid Copolymer
28. Polyvinyl Alcohol
29. Phenylpropanol
30. Copper Palmitoyl Heptapeptide-14
31. Heptapeptide-15 Palmitate
32. Potassium Sorbate
33. Xanthan Gum

Highlights

Free of alcoholFree of parabensFree of siliconesFree of sulfatesFree of mineral oilFree of essential oilsFree of formaldehyde releasersContains PEGContains EU-26 allergensContains fragrance

Formulation view Serum containing multiple peptides, hyaluronic acid, and prebiotics for hydration and repair. Uses carbomer thickening, with antioxidants and algal extracts. Fresh texture, suitable for all skin types. Formulator observation: multi-peptide blend requires stability focus, prebiotics and antioxidants synergize for barrier function.

Key ingredients

SOLVENT

Aqua

DENATURANT

Glycerin

HUMECTANT

Butylene GlycolSodium Hyaluronate

SKIN CONDITIONING

InulinCarnosine

ANTISTATIC

Panthenol

CLEANSING

Alpha-Glucan Oligosaccharide

Other ingredients

CarbomerPolysorbate 20Caprylyl GlycolPhenoxyethanolHydroxypropyl CyclodextrinDunaliella Salina ExtractEthylhexylglycerinCitric AcidPalmitoyl Tripeptide-5Sodium BenzoateAcetyl Hexapeptide-8Tetrapeptide-21Pentapeptide-18Palmitoyl Tripeptide-1PantolactonePalmitoyl Tripeptide-38Palmitoyl Tetrapeptide-7Glyceryl CaprylateLactic Acid/Glycolic Acid CopolymerPolyvinyl AlcoholPhenylpropanolCopper Palmitoyl Heptapeptide-14Heptapeptide-15 PalmitatePotassium SorbateXanthan Gum

Skim through

Ingredients explained

Aqua

Solvent, main base; microbial control is critical

Glycerin

Workhorse humectant at 3–10%; tacky at high levels, pair with occlusives

Butylene Glycol

Polyol humectant and solvent at 1–5%; aids solubilization, light feel

Inulin

Plant fiber/prebiotic for moisturizing; fully dissolve to avoid crystallization

Sodium Hyaluronate

Potent humectant at 0.1–2%; different MW for penetration depth, high levels may draw moisture

Panthenol

Panthenol (vitamin B5) at 1–5%; moisturizing and reparative, supports barrier recovery

Alpha-Glucan Oligosaccharide

Prebiotic for microflora and smoothing; use 0.5-5%, suitable for sensitive skin

Carnosine

Dipeptide skin conditioner with antioxidant and buffering properties; used in synergy with other actives.

Carbomer

Gelling thickener requiring neutralization; watch out for ion compatibility

Polysorbate 20

Non-ionic emulsifier and cleansing surfactant; contains PEG, control microbial load.

Caprylyl Glycol

Polyol conditioner and preservative booster at 0.5–3%; emollient feel, often paired with 1,2-hexanediol

Phenoxyethanol

Broad-spectrum preservative at ≤1%; may irritate sensitive eye areas, often paired with ethylhexylglycerin

Hydroxypropyl Cyclodextrin

Cyclodextrin to complex fragrances/actives; boosts solubility and stability.

Dunaliella Salina Extract

Microalgal extract used as a skin conditioning agent for soothing and barrier support; no public irritancy or comedogenic data.

Ethylhexylglycerin

Mild conditioner and preservative booster at 0.5–1%; reduces preservative load, smooth feel

Citric Acid

Buffer and chelator at 0.1–2%; adjusts pH, may irritate sensitive skin at low pH

Palmitoyl Tripeptide-5

Peptide actives for skin conditioning; typically used at low levels.

Sodium Benzoate

Preservative booster, effective below pH 4.5; combinable with sorbates

Acetyl Hexapeptide-8

Acetyl hexapeptide-8; signal peptide, low concentration, used for firming and hydration, low irritancy.

Tetrapeptide-21

Tetrapeptide-21 often used for regeneration; requires temperature/light control and careful acid compatibility.

Pentapeptide-18

Peptide for skincare; added at low levels, check supplier data for stability.

Palmitoyl Tripeptide-1

Palmitoyl Tripeptide-1 for repair; requires lipid carrier, unstable in aqueous phase

Pantolactone

Pantolactone, humectant; hydrolyzes to release panthenol, improves skin hydration, low level use, high safety

Palmitoyl Tripeptide-38

Palmitoyl tripeptide; signaling peptide for collagen and antioxidants; 0.1-1% typical, light-sensitive

Palmitoyl Tetrapeptide-7

Palmitoyl Tetrapeptide-7 boosts collagen; use 0.1–1%, formulate with lipid carriers

Glyceryl Caprylate

Mild emulsifier/deodorant at 0.5-2%; polyol ester, high humectancy, low irritancy, check cationic surfactant compatibility.

Lactic Acid/Glycolic Acid Copolymer

AHA copolymer; exfoliating, requires buffering agents.

Polyvinyl Alcohol

Film/viscosity agent for masks/cleansers; water-soluble, forms flexible film

Phenylpropanol

Phenylpropanol for fragrance and solvent; allergen risk, requires assessment

Copper Palmitoyl Heptapeptide-14

Not decoded yet

Heptapeptide-15 Palmitate

Not decoded yet

Potassium Sorbate

Preservative effective below pH 6; combinable with sodium benzoate

Xanthan Gum

Natural thickener at 0.1–1%; provides gel texture, pH-stable, requires full hydration

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