A multifunctional amino acid that acts as a reducing agent and an antioxidant.
Antioxidant
Antioxidant
Antioxidants reduce the oxidative stress caused by free radicals and prevent accelerated skin aging.
Antioxidant
Antioxidants reduce the oxidative stress caused by free radicals and prevent accelerated skin aging.
Other functions
Fragrance,
Fragrance
Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients.
Fragrance,
Fragrance
Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients.
Antistatic,
Antistatic
Antistatic – reduces electric charge buildup.
Antistatic,
Antistatic
Antistatic – reduces electric charge buildup.
Reducing
Reducing
Reducing – reduces substances by donating electrons.
Reducing
Reducing
Reducing – reduces substances by donating electrons.
Origin
Synthetic,
Synthetic
All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure.
Synthetic,
Synthetic
All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure.
Animal
Animal
Ingredients derived from animals (including birds, fish, crustaceans, mollusks, and insects) or produced by animals (e.g. dairy- and egg-derived ingredients, bee products, silk, pearls, etc.)
Animal
Animal
Ingredients derived from animals (including birds, fish, crustaceans, mollusks, and insects) or produced by animals (e.g. dairy- and egg-derived ingredients, bee products, silk, pearls, etc.)
Overview
Cysteine is a nonessential amino acid, which means it can be produced in the human body.
In skincare products, it is useful in producing flavoring agents. Its chemistry also allows it to act as a reducing agent, in which it breaks down double and triple bonds – the opposite of oxidation. Cysteine can also act as an antioxidant.
In hair care, cysteine is used to break the disulfide bonds in the keratin of the hair, which is used in the permanent curling and relaxing processes.
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