Preferred Nutrition Lion's Mane - Lion’s Mane Mushroom is a source of fungal polysaccharides with immunomodulating properties. It also provides antioxidants that help protect against free radicals. Each vegetarian capsule contains 500 mg of 10:1 lion’s mane (Hericium erinaceus) extract derived from the fruiting body. It is non-GMO, gluten-free, and suitable for vegetarians and vegans.