Studies are clear that baker’s yeast Beta Glucan are most effective. This includes barley, oats, mushrooms, and any other source. However, there extremely inferior baker’s yeast beta glucan products on the market. The most important aspect of our Beta Glucan is the patented purification process developed by creator, AJ Lanigan. Each “batch” of our product has to meet the minimum 85% purity standard, which truly sets it apart from all competition.