Nature's Sources, LLC is located in Niles, Illinois just outside of Chicago and was founded by Mr. Lee Frank on August 1, 1995 for the purpose of producing the very first 100% plant-based human digestive enzyme formula in the USA, called AbsorbAid. Previously, enzyme formulas were available solely on a limited basis for animals only by its then sister-company Prozyme, LLC. Nature's Sources AbsorbAid has proven to be the best digestive enzyme formula on the market today. AbsorbAid was also tested in nursing home trials, being added directly into feeding tubes with great success proving there was an increased rate of absorption of amino acids with assured safety. AbsorbAid is also available overseas in parts of Asia, Singapore, England, and Israel with China, and Indonesia poised to distribute to over 4000 retail locations, and Chile on the horizon. The goal of Nature's Sources is to provide the highest quality and best digestive enzyme formulas available in the world today by incorporating only the finest raw ingredient providers who adhere to FDA and GMP standards. Herbspro.com is proud to carry the entire range of this fine brand.