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INCI name

LEUCINE

Leucine

AntistaticHair conditioningSkin conditioningreviewed

An amino acid used for hair and skin conditioning.

What it is

Leucine (L-leucine) is a branched-chain amino acid and one of the building blocks of proteins. CosIng lists it as an antistatic, hair-conditioning and skin-conditioning agent.

Where it is used

Found in shampoos, conditioners, serums and creams, often together with other amino acids.

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 INCI name does not reveal whether it was produced by fermentation, extraction or synthesis.

Functions

Antistatic
Preventing and/or reducing static electricity by neutralising electrical charge on surfaces.
Hair conditioning
Enhancing the appearance and feel of hair. Leaving the hair easy to comb, supple, soft and shiny and/or imparting volume, lightness, gloss, texture, etc.
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 (45)

Check a full ingredient list