Amino Acids + B5
Serum
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All 26 ingredients
Amino Acids + B5 by The Ordinary lists 26 ingredients, in label order. Each line says what the ingredient does in the formula.
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aqua
Solvent
propanediol
Solvent · humectant
betaine
sodium pca
panthenol
Skin conditioning
sodium lactate
arginine
pca
aspartic acid
glycine
alanine
serine
threonine
valine
proline
isoleucine
lysine hcl
histidine
phenylalanine
glutamic acid
citric acid
pH adjuster
dimethyl isosorbide
polysorbate 20
Emulsifier
trisodium ethylenediamine disuccinate
1,2-hexanediol
caprylyl glycol
Humectant · preservative booster
Ingredients: The Ordinary website · Updated October 21, 2026