AHCC is a natural substance made from medicinal mushrooms containing bioactive, low molecular weight hexose molecules AHCC has also been reported in scientific literature to have beneficial influences on Immune support and overall wellness. Immune System Support, Supports T-Cell & Natural Killer Cell Activity, A Leading Alternative Immune Support Therapy in Japan Since 1992 - US based Olympian Labs prides itself at ensuring our supplement products are lab tested and quality controlled.