subject: Vitamins and Raw Material Sources [print this page] It is often recommended that one does not purchase a vitamin from a retail mega-store because supplements are not their expertise, instead choose from a specialized and knowledgeable distributor that focuses on quality products and ingredients. Read the labels carefully, if the product is tested for purity and the manufacturer follows the cGMP's, more than likely it will state this on their label, and if in doubt, contact the manufacturer and ask.
