Mitsubishi Corporation Life Science Limited is one of the largest provider of Glutathione in the world. We provide high-quality Glutathione “OPITAC™” with excellent scientific evidences.

The brand name OPITAC™ is inspired by the words “optimize” and “intact”. We chose the trade name based on Glutathione’s fundamental function to optimize health. “Tac” stands for our breakthrough human clinical study which demonstrated single-dose intact absorption of Glutathione for the first time.