We love mushrooms. In food and as a supplement. Some key mushrooms to look out for in wellness products include the Reishi mushroom - used for thousands of years in medicines across Asia and helps enhance the immune system, reduce stress, and improve sleep; Shiitake mushrooms - containing high levels of kojic acid, good for brightening skin; and Turkey Tail mushrooms, full of antioxidants and probiotics that help the immune and digestive systems.