SPF Scout · Ingredient
Threonine
What this ingredient generally does
Threonine is an amino acid used mainly to condition hair. It smooths hair, cuts down static so strands sit better, and plays a part in waving or straightening formulas.
Reviewed before publication. This note describes function in a formulation — nothing else.
Published formulations that list this ingredient
These are the formulations currently published in the SPF Scout catalog whose stored ingredient declaration includes this ingredient. It is not a list of every product on the market, and the order carries no meaning.
Blue Lizard Blue Lizard Sheer Face SPF 50 Sunscreen
SPF 50 as labeled · U.S. formulation
COSMAX USA UV RESTORE FACE SERUM SUNSCREEN SPF 50
SPF 50 as labeled · U.S. formulation
COSMAX USA, CORP IDEALOVE HYDROGLOW DAILY SUNSCREEN SPF 50
SPF 50 as labeled · U.S. formulation
Mitchell Cosmetics, Inc OMIC MINERAL SUNSCREEN
U.S. formulation
Versed VERSED DAILY SUNSCREEN SPF 50
SPF 50 as labeled · U.S. formulation
Checking this against your own list
You can select this ingredient in the SPF Scout app as one to flag. The app compares your selections against a product's stored declaration on your device; your list never reaches this website.
This comparison does not predict whether your skin will react.
Where this information comes from
Ingredient names, CAS numbers and recorded functions come from SPF Scout’s curated ingredient dictionary, grounded in CosIng, the European Commission’s Cosmetic Ingredient Database. Content © European Union, reused with acknowledgement.