What is Glutathione? Foods that are naturally rich in Glutathione Times of India Glutathione is such an important antioxidant in human physiology, meaning it acts to combat oxidative stress. Strategies for increasing glutathione include: Consume sulfur rich foods like cruciferous vegetables Ensure you get Substitution of fishmeal: Highlights of potential plant protein sources for aquaculture sustainability: Heliyon Natural Ways to Increase Your Glutathione Levels