Designed to assist dietary supplement manufacturers in providing quality products to consumers, the U.S. Pharmacopeial Convention (USP), Rockville, MD, has released the USP Dietary Supplements Compendium (DSC), which will also help manufacturers in complying with GMP regulations. The DSC contains quality specifications for more than 500 dietary supplements and ingredients, including standards for identity, strength, purity and performance characteristics. In addition, the DSC includes general and regulatory information, guidance documents, appendices, and macro/microscopy, thin layer chromatography (TLC) and high performance liquid chromatography (HPLC) full-color images that simplify the analysis of ingredients of botanical origin.