Vivamune™ contains ( Wellmune WGP ® ), a natural yeast 1,3/1,6 β-Glucan, derived from the cell wall of a highly purified, strain of baker’s yeast (Saccharomyces cerevisiae). How to use: The recommended daily dosage is one capsule daily with water Caution & Warnings: If your are allergic (hypersensitive) to the active substance, 1,3/1,6 β-Glucan ( Wellmune WGP ® ) or to any of the other ingredients of Vivamune™ capsules. No adverse effects were reported regarding the simultaneous use of 1,3/1,6 β-Glucan ( Wellmune WGP ® ) and other medicines. The preparation can therefore be combined safely with other medicines. Vivamune™ capsules can be taken daily with no unwanted effects, so there is no need to wait for the first signs of illness or put a limit on how many days you should take . The ingredient ( Wellmune WGP ® ) is Generally Recognised As Safe (GRAS) under USFDA.