Source Naturals 250 mg Beta Glucan, 60 TabletsSource Naturals Beta Glucan, 250 mg, 60 Tablets, is a dietary supplement designed to support a healthy immune system. The active ingredient, Beta1,3 1,6DGlucan, is a bioactive carbohydrate derived from the cell wall of Saccharomyces cerevisiae, commonly known as baker's yeast. This product is formulated to maintain several aspects of the body's normal immune functions. Research from animal and human cell culture studies indicates that betaglucan can