Throughout Asia, medicinal mushrooms and herbs have been in constant use for thousands of years as integral parts of their traditional medical systems. That's probably why maitake and other medicinal mushrooms and herbs are taken mush more seriously by doctors and medical researchers in Asia than their counterparts here in the West.Medicinal mushrooms like maitake have been the subject of intense research and attempts to identify the key compounds responsible for their beneficial effects. This led to the discovery of valuable immune-enhancing compounds like the alpha and beta-glucans found in maitake mushroom. NOW Foods Maitake Mushroom is a great option for anyone seeking robust and scientifically-validated support for their immune system.