EWG Rating – 1
It can be produced by crystallizing a solution of sodium bisulfite.
What Is It?
It is a synthetic ingredient known for its multiple uses, mainly as an antioxidant preservative in product formulations.
What Does Research Say About This Ingredient?
Researchers have found that it can be used as a reducing agent in formulations.
Benefits of Sodium Metabisulfite on Hair after Topical Application
It functions as a hair waving/straightening agent. It helps alter the structure of hair & is also added in almost all hair dyes.