The Theorem Method
Driven by beauty, backed by science
Our team is composed of brilliant scientists and designers with 75 years of combined experience. We have developed best-selling products with over a billion dollars in revenue sold worldwide. Disappointed with products on the shelf, we designed unique formulas with proven results to give YOU, your very best hair!
Hair chemistry at its best.
Access to the latest clinical studies and ingredients ensures that our formulas are always one step ahead of the rest. Theorem products are scientifically proven to repair and improve your hair, no matter what type of hair you have! Our team has worked on 10’s of thousands of formulations throughout their careers. Theorem is the culmination of our most promising research, resulting in the first brand to devise a 3-dimensional solution to achieve thicker hair from root to tip!