INCI name

LYSINE CARBOXYMETHYL CYSTEINATE

Lysine carboxymethyl cysteinate

A salt of lysine and carbocisteine used in hair waving and straightening products.

What it is

Lysine carboxymethyl cysteinate is a 1:1 salt of the amino acid lysine with S-carboxymethyl-L-cysteine (carbocisteine), a sulfur-containing amino acid derivative. CosIng lists it as a hair waving or straightening and skin-conditioning ingredient.

Where it is used

Found in hair treatments, perming and straightening products and other hair care products.

Limits of interpretation

The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.

The label does not show the amount used.

Functions

Hair waving or straightening
Modifying the chemical structure of the hair, allowing it to be set in the style required (permanent waves or hair straightening).
Skin conditioning
Maintaining the skin in good condition.

EU regulation

This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.

Products with this ingredient (6)

Check a full ingredient list