The Skin Formulary
IngredientsBrandsJournalShop
Browse Products

Researched by Helena DeMaria-Williams

Formula IngredientAmino Acid

Lysine HCl

INCI: Lysine HCl

Lysine HCl is the hydrochloride salt of L-lysine, an essential amino acid that the body cannot synthesise. In cosmetics it functions as a hair and skin conditioning agent. Lysine is a building block for collagen and elastin, and supports the skin's natural repair processes.

Category

Amino Acid

Irritation Risk

Low

Skin Types

all skin types

What does this do in a formula?

skin conditioning, hair conditioning, collagen support, moisture retention

Is Lysine HCl safe? Key considerations

Can Lysine HCl cause irritation?

Low Risk

Well tolerated across skin types. No EU CosIng Annex restrictions.

Does Lysine HCl increase sun sensitivity?

No Risk

Does not increase photosensitivity.

Is Lysine HCl safe during pregnancy?

Safe

Lysine is a naturally occurring essential amino acid. Topical cosmetic use is considered safe during pregnancy.

How does Lysine HCl work?

Lysine HCl is the hydrochloride salt of L-lysine, an essential amino acid that the body cannot synthesise. In cosmetics it functions as a hair and skin conditioning agent. Lysine is a building block for collagen and elastin, and supports the skin's natural repair processes.