LYSINE HCL
LYSINE HCL is the hydrochloride form of lysine, an amino acid. The “HCl” in the name means that lysine is present as a salt; it does not mean that the product contains free hydrochloric acid. That detail distinguishes LYSINE HCL from LYSINE, the label name used for lysine without that salt designation.
LYSINE HCL: what it is
LYSINE HCL is the hydrochloride form of lysine, an amino acid. The “HCl” in the name means that lysine is present as a salt; it does not mean that the product contains free hydrochloric acid. That detail distinguishes LYSINE HCL from LYSINE, the label name used for lysine without that salt designation.
PubChem identifies one form as L-lysine monohydrochloride. The identifiers associated with LYSINE HCL also include L and DL forms, so the INCI name alone does not reveal which configuration is in a product. This chemical distinction does not change how to look for the ingredient on a label, but it does keep the different lysine names from being treated as identical.
LYSINE HCL: what it does in cosmetics
In cosmetics, LYSINE HCL is listed for skin and hair conditioning. For skin, conditioning refers to contributing to a more comfortable, less rough feel; for hair, it relates to formulas intended to leave strands more pleasant to touch and manage. It is not a cleansing agent or a colorant.
The Cosmetic Ingredient Review assessment of alpha-amino acids examined irritation and sensitization data relevant to topical products and found the group safe in the practices and concentrations assessed. That assessment is not a performance test of LYSINE HCL in every cream or conditioner: its presence alone does not establish hair repair or skin treatment.
Products containing this ingredient
See which products include it and the name used in each composition.
