Bigen Men?s Speedy Color is the solution for men?s gray to carry out a stylish look. It contains 3 conditioning ingredients which gives your hair gloss and moisture. Glycine is one of the protein substance. It helps to protect the hair and decrease hair damage caused by using hair coloring products. It is easy-to-use, so you can cover gray hair quickly and also unpleasant smell will not bother you during the application.