Researched by Helena DeMaria-Williams
Formula IngredientAmino AcidIsoleucine
INCI: Isoleucine
Isoleucine is an essential branched-chain amino acid (BCAA) that the body cannot produce on its own. In cosmetics it functions as a skin-identical moisturiser and skin-conditioning agent. It is a building block for skin proteins and may support skin barrier repair, particularly in conjunction with ceramides.
Category
Amino Acid
Irritation Risk
Low
Skin Types
all skin types, dry skin, eczema-prone skin
What does this do in a formula?
skin conditioning, moisturisation, barrier repair support, hair conditioning, protein synthesis support
Is Isoleucine safe? Key considerations
Can Isoleucine cause irritation?
Low RiskWell tolerated. A naturally occurring essential amino acid. No EU CosIng Annex restrictions.
Does Isoleucine increase sun sensitivity?
No RiskDoes not increase photosensitivity.
Is Isoleucine safe during pregnancy?
SafeEssential amino acid naturally present in the body and diet. Topical cosmetic use is considered safe during pregnancy.
How does Isoleucine work?
Isoleucine is an essential branched-chain amino acid (BCAA) that the body cannot produce on its own. In cosmetics it functions as a skin-identical moisturiser and skin-conditioning agent. It is a building block for skin proteins and may support skin barrier repair, particularly in conjunction with ceramides.
Which products contain Isoleucine?
Shop products that contain Isoleucine
Glycolic Acid 7% Exfoliating Toner
Multi-Peptide + Copper Peptides 1% Serum
Volufiline 92% + Pal-Isoleucine 1%
Natural Moisturizing Factors + HA
Multi-Peptide + HA Serum
Marine Hyaluronics
