Theorem Method Hair Care products are sulfate-free, paraben-free, gluten-free, phthalate-free, cruelty-free and vegan. These are plant-based products to take your hair from tragic to magic, healing hair from root to tip!
Theorem Method also has three formulas of shampoos, from hydrating to volumizing, as well as purple shampoo for blondes, silvers, grays, and those with highlights. Try the Curl Cream or Vector Straightening Balm for amazing style products.