The Agaricus Blazei Murill (or commonly known as Brazilian mushrooms) contains the highest level of beta-glucans. Beta-glucans stimulate various aspects of the immune system by increasing activity levels of immune cells like macrophages and T-cells that are first to fight bad bacteria and viruses. Lifestream ABM Immuno Advance contains 10 times concentrated extract with other medicinal mushroom extracts for potent immunity protection and support general health.