Hericium Erinaceus mushroom, also known as the Lion's Mane mushroom, is a type of mushroom that has been traditionally used in Chinese and Japanese medicine. It is believed to have a range of potential health benefits, including support for cognitive function, immune function, and overall health. Nature Restore's Hericium extract mushroom is standardized to 20% polysaccharides, comparable to roughly a 10:1 extract ratio. This supplement is a powerful immune system booster, and 3rd party tested for heavy metals, so you can trust that you're getting the best possible product.