ImmPower AHCC from American BioSciences is an immune system supplement made from Active Hexose Correlated Compound. In 1984, Japanese scientists discovered that by hybridizing several mushrooms used traditionally, they could develop a natural compound that would help give the body what it needs to support immunity. Named Active Hexose Correlated Compound (AHCC), it has a unique alpha-1, 4 glucan structure and low molecular weight that research shows provides support for the immune system.