Tag : L-Cystine Gluten Free

HomePosts Tagged L-Cystine Gluten Free

L-Cystine Gluten Free

Does anyone know if L-Cystine E921 is gluten free?  Yes, L-Cystine E921 is gluten free and widely used in gluten free food used as a amino acid dietary supplement in pizza dough, calzones, pie crusts, bread sticks and tortillas. L-Cystine E921 is a colorless or white, crystalline powder. Why is L-Cystine E921 gluten free? Gluten is a type of elastic grain protein that