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About Nature’s Sources

Nature’s Sources is dedicated to enhancing the overall health of its customers by offering superior nutritional products, education, service and support, and at the same time being considerate of the environment by utilizing only sustainable products in its manufacturing and distribution efforts.


To continually make advancements that move us to international leadership in brand manufacturing and distribution with a strong commitment to redefining “optimal health.”


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.

AbsorbAid® digestive enzyme formulas are sold widely throughout the United States in over 8,000 retail establishments, including, Health Food Stores, large chains as well as independents, pharmacies, and grocery stores with wide distribution as well through giant distributors such as UNFI and Threshold. 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.

Nature’s Sources AbsorbAid® prides itself on manufacturing the only clinically tested and scientifically proven digestive enzyme formula on the market today; no competing companies we know of can make that claim. AbsorbAid® has been tested and shown to promote the absorption of vital nutrients by up to 71% as stated by two prestigious laboratories, Roche and Mayo Clinic. 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.

In 2008 Nature’s Sources, LLC released its proprietary Platinum formula, the latest wide-spectrum 12 strain digestive blend which also includes 2 heat resistant probiotics, to service those who have more extreme physical demands, tend to be more active, eating heavier meals, and for those who need more digestive support. Platinum has gained quite a lot of notoriety in the marketplace in a short time with customers calling in some cases, to rave about the product as a great digestive aid. No refrigeration is needed.

The Executives of Nature’s Sources, LLC, John Zapfel, Chief Executive Officer, and Dr. Janet Angel, Executive Vice President, have combined industry experience of over 60 years. Mr Zapfel and Dr. Angel have been involved in every faction of the natural health industry from formulations and manufacturing to retail, wholesale and distribution. Dr. Angel is a host and frequent guest on radio/TV and a speaker on various health topics around the country.

Nature’s Sources has a wonderful team of in-house Operational leaders headed by Barbara Shah, Office Manager. These professionals monitor and support all phases of the operation including manufacturing, customer inquiries, ordering, distribution details, logistics, warehousing and shipping. Our outside sales force and Brokers number over 115 individuals around the globe.

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. AbsorbAid® is unique because it is a totally natural digestive aid made solely from plant sources.

Articles about AbsorbAid® have been published in the Journal of American College of Nutrition; New England Journal of Medicine, International Journals, Medical Books, Magazines and it was recently included in a Hallmark Television educational piece on the importance of digestion and health.

Hundreds of thousands of people have taken AbsorbAid® to improve their overall digestion and health; it is a natural complement to every meal and many other supplements one may take. AbsorbAid® has been highly recommended by physicians all over the world.

Nature’s Sources, LLC is also the sole distributor of Kolorex products manufactured by Forest Herbs in New Zealand. Kolorex is an herbal antifungal ine of products available in softgels for the management of intestinal microflora. We also have two soothing creams to soothe sensitive intimate areas and to promote softer skin on the overall body as well as feet.

Nature’s Sources also provides Rite Zyme, a line of digestive enzyme products for animals used currently for dogs, cats and horses. Ritezyme aids in the digestion of food, improves nutrient absorption to the body, supports the health of joints, skin, hair, teeth and coat; plus many other benefits that enzymes are known to help with.