If you are purchasing for laboratory or industrial applications, the focus shifts to potency and activity levels (measured in U/ml).
Catalase - Fights Cellular Ageing and Premature Greying of Hair buy catalase
: For those who prefer a topical approach, this shampoo is dye-free and suitable for all hair types. It aims to replenish catalase levels directly at the scalp. If you are purchasing for laboratory or industrial