algenist AA Barrier Serum

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. Water (Aqua
2. Eau)
3. Butylene Glycol
4. PEG-8 Dimethicone
5. Propanediol
6. Caprylyl Methicone
7. Dimethicone
8. Parachlorella Beijerinckii Exopolysaccharides
9. Butylene Glycol
10. PEG-8 Dimethicone
11. Propanediol
12. Caprylyl Methicone
13. Dimethicone
14. Parachlorella Beijerinckii Exopolysaccharides
15. Phloretin
16. Ergothioneine
17. Copper Palmitoyl Heptapeptide-14
18. Heptapeptide-15 Palmitate
19. Epigallocatechin Gallate
20. Tocopheryl Acetate
21. Aspartic Acid
22. Pca
23. Disodium EDTA
24. Alanine
25. Serine
26. Valine
27. Isoleucine
28. Proline
29. Threonine
30. Lactic Acid/Glycolic Acid Copolymer
31. Polyvinyl Alcohol
32. Histidine
33. Phenylalanine
34. Arginine
35. Ascorbic Acid
36. Octyldodecanol
37. Pyridoxine Hcl
38. Retinyl Palmitate
39. Silica
40. Sodium Propoxyhydroxypropyl Thiosulfate Silica
41. Glycerin
42. Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
43. Ammonium Acryloyldimethyltaurate/VP Copolymer
44. Pentylene Glycol
45. Isohexadecane
46. Adenosine Triphosphate
47. Hydrolyzed Oat Protein
48. Niacinamide
49. Citric Acid
50. Polysorbate 60
51. Sorbitan Isostearate
52. Sodium PCA
53. Sodium Phytate
54. Sodium Lactate
55. Sodium Benzoate
56. Potassium Sorbate
57. Phenoxyethanol

Highlights

Free of alcoholFree of parabensFree of sulfatesFree of essential oilsFree of formaldehyde releasersContains PEGContains siliconesContains fragranceContains mineral oil

Key ingredients

溶剂

Water (AquaEau)

HUMECTANT

Butylene GlycolButylene Glycol

皮肤调理剂

PEG-8 Dimethicone

SOLVENT

Propanediol

SKIN CONDITIONING

Caprylyl Methicone

ANTIFOAMING

Dimethicone

Other ingredients

Parachlorella Beijerinckii ExopolysaccharidesPEG-8 DimethiconePropanediolCaprylyl MethiconeDimethiconeParachlorella Beijerinckii ExopolysaccharidesPhloretinErgothioneineCopper Palmitoyl Heptapeptide-14Heptapeptide-15 PalmitateEpigallocatechin GallateTocopheryl AcetateAspartic AcidPcaDisodium EDTAAlanineSerineValineIsoleucineProlineThreonineLactic Acid/Glycolic Acid CopolymerPolyvinyl AlcoholHistidinePhenylalanineArginineAscorbic AcidOctyldodecanolPyridoxine HclRetinyl PalmitateSilicaSodium Propoxyhydroxypropyl Thiosulfate SilicaGlycerinHydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate CopolymerAmmonium Acryloyldimethyltaurate/VP CopolymerPentylene GlycolIsohexadecaneAdenosine TriphosphateHydrolyzed Oat ProteinNiacinamideCitric AcidPolysorbate 60Sorbitan IsostearateSodium PCASodium PhytateSodium LactateSodium BenzoatePotassium SorbatePhenoxyethanol

Skim through

Ingredients explained

Water (Aqua

Solvent and base; pharmaceutical grade recommended for active formulations.

Eau)

Pure water, solvent and diluent; drinking water standard, no known allergens or irritation

Butylene Glycol

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

PEG-8 Dimethicone

Water-soluble silicone offering slip and spreadability; helps disperse silicone ingredients, generally well-tolerated by sensitive skin.

Propanediol

Polyol solvent at 1–5%; light feel, aids solubilization, propylene glycol alternative

Caprylyl Methicone

Volatile silicone, fresh feel, does not absorb oil, used in foundations and cushions.

Dimethicone

Silicone occlusive at 1–5%; provides smooth feel, non-penetrating, suitable for sensitive skin

Parachlorella Beijerinckii Exopolysaccharides

Not decoded yet

Butylene Glycol

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

PEG-8 Dimethicone

Water-soluble silicone offering slip and spreadability; helps disperse silicone ingredients, generally well-tolerated by sensitive skin.

Propanediol

Polyol solvent at 1–5%; light feel, aids solubilization, propylene glycol alternative

Caprylyl Methicone

Volatile silicone, fresh feel, does not absorb oil, used in foundations and cushions.

Dimethicone

Silicone occlusive at 1–5%; provides smooth feel, non-penetrating, suitable for sensitive skin

Parachlorella Beijerinckii Exopolysaccharides

Not decoded yet

Phloretin

Not decoded yet

Ergothioneine

Ergothioneine, potent antioxidant; 0.01–0.1%, water-soluble, synergizes with Vit C/E.

Copper Palmitoyl Heptapeptide-14

Not decoded yet

Heptapeptide-15 Palmitate

Not decoded yet

Epigallocatechin Gallate

Potent water-soluble polyphenol antioxidant <1%; may affect color stability

Tocopheryl Acetate

Vitamin E derivative antioxidant at 0.1–1%; more stable than tocopherol, store protected from light

Aspartic Acid

Amino acid humectant and conditioner, common in rinse-off products; low levels mild, high levels may shift pH

Pca

Proline carboxylic acid, NMF component; humectant, generally low irritation but may sensitise.

Disodium EDTA

Chelating agent at 0.05–0.5%; sequesters metal ions for stability, boosts preservative efficacy

Alanine

Amino acid for antistatic and conditioning; low irritation, slight salty taste at high levels

Serine

Humectant amino acid, 1–3%; high water solubility, compatible with sensitive skin.

Valine

Amino acid humectant, common in amino acid cleansers and sprays; mild, suitable for all skin types

Isoleucine

Amino acid for hair and skin conditioning and antistatic purposes; often blended; check taste if high.

Proline

Proline, amino-acid humectant; boosts stratum corneum hydration, stable at pH 4-5.

Threonine

Threonine, essential amino acid for hair/skin; blended with other AAs for balance.

Lactic Acid/Glycolic Acid Copolymer

AHA copolymer; exfoliating, requires buffering agents.

Polyvinyl Alcohol

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

Histidine

Amino acid humectant and antistatic agent; pH-dependent behavior, consider buffering in formulation.

Phenylalanine

Amino acid for hair and skin conditioning; usually part of a blend, no significant standalone efficacy data

Arginine

Arginine for moisturizing/conditioning; amino acid, high biocompatibility, often used in blends.

Ascorbic Acid

Vitamin C, potent antioxidant requiring acidic environment for stability; oxidizes and discolors easily, needs light and air protection, concentration 1-10%, pure L-ascorbic acid is more irritating.

Octyldodecanol

Light emollient/emulsifier at 1-5%; low comedogenic, non-greasy feel, broadly compatible, sensitive-skin friendly.

Pyridoxine Hcl

Vitamin B6 HCl; trace skin/hair conditioning/antiox; very mild, high-conc pigmentation debate

Retinyl Palmitate

Vitamin A ester for skin conditioning; light-sensitive, requires protection, avoid in pregnancy.

Silica

Silica powder at 1–10%; absorbs oil, thickens, provides matte finish, for oil-control products

Sodium Propoxyhydroxypropyl Thiosulfate Silica

Not decoded yet

Glycerin

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

Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer

High-molecular-weight thickener and emulsion stabilizer; requires electrolytes or acid adjustment near isoelectric point for optimal performance.

Ammonium Acryloyldimethyltaurate/VP Copolymer

Cationic polymer providing suspension, thickening, and conditioning; often paired with anionic thickening systems, low usage, imparts slip.

Pentylene Glycol

Polyol humectant at 1-3%; low irritancy, suitable for sensitive skin

Isohexadecane

Lightweight mineral-oil-derived emollient and solvent; low viscosity, non-comedogenic, improves texture

Adenosine Triphosphate

ATP for skin conditioning, repair concept; stability in aqueous phase is a concern.

Hydrolyzed Oat Protein

Hydrolyzed Oat Protein; small peptides for static control, hair/skin conditioning, soothing.

Niacinamide

Niacinamide at 2–5%; improves texture, controls oil, brightens; high levels may cause sensitivity

Citric Acid

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

Polysorbate 60

Non-ionic emulsifier and solubilizer for O/W or W/O stability; may cause mild stinging on sensitive skin, typically 1-5%.

Sorbitan Isostearate

Non-ionic emulsifier (low HLB); typically used in blends, low comedogenicity, soft skin feel.

Sodium PCA

Sodium PCA, NMF component, 1-10% humectant; salty/tacky at high levels.

Sodium Phytate

Chelating agent stabilizes metal ions to prevent oxidative degradation; also used in oral care, high safety profile.

Sodium Lactate

Sodium lactate for moisturizing and exfoliation; pH buffering agent

Sodium Benzoate

Preservative booster, effective below pH 4.5; combinable with sorbates

Potassium Sorbate

Preservative effective below pH 6; combinable with sodium benzoate

Phenoxyethanol

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

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