Supports Breast Colon & Prostate Cells. IP-6 (inositol hexaphosphate) is a component of certain dietary fibers particularly most cereal grains legumes and seeds high in oil. Many researchers believe some of fiber's health benefits may be due to the antioxidant immune-enhancing and cardiovascular-supporting activities of IP-6. In-vitro and animal research has shown IP-6 to have significant protective and growth-regulating effects on certain cells and tissues including those of the colon breast and prostate. Source Naturals IP-6 is free of other active ingredients. Only IP-6 in this form has consistently demonstrated positive research results.