Inspired by health traditions around the world, Jarrow Vegan Immune Optimizer makes sure your immune system is primed and ready to fight. This plant-powered formula features PeakO2, a carefully crafted blend of mushrooms--cordyceps, reishi, lion's mane, shiitake, king trumpet and turkey tail--that work together to invigorate the body and fight the stressors that can wear you down. Mushrooms are a powerful source of beta-glucans that help keep your immune system on the lookout for threats. Combined with clinically researched AP-BIO andrographis, an herbal favorite of Swedish, Chinese and Indian health practices, Vegan Immune Optimizer promotes antioxidant and immune protection.