Real Mushrooms L-Ergothioneine is a dietary supplement made from organic Golden Oyster mushrooms. Each capsule contains pure L-ergothioneine, a powerful antioxidant known for its longevity benefits. The supplement is made from 100% mushrooms (fruiting bodies) and does not contain any grains, additives, or fillers. It is verified for active compounds, including beta-glucans, which support immune health. The product is gluten-free, non-GMO, and vegan, making it suitable for a wide range of dietary needs. With over 40 years of expertise in mushroom growing, Real Mushrooms ensures high-quality and potent supplements to support overall health and well-being.