Dietary Supplement. Immune Support* With AHCC®, Andrographis, Fast-C™, OptiZinc® & D3. Significantly improves immune response*. Corrects deficiencies of key nutrients* ImmunoComplex® contains some of the world s most-researched immune health ingredients, including: AHCC®, a hybridized medicinal mushroom extract supported by over 20 published clinical studies.*. AP-Bio™ andrographis extract - clinically demonstrated to improve the body s response to immune challenges. Vitamins and minerals necessary f.