The National Animal Supplement Council is a non-profit industry group dedicated to protecting and enhancing the health of companion animals and horses throughout the United States. NASC was formed in 2001 when the multibillion dollar animal health supplement industry was threatened by a complicated and erratic regulatory environment.

As part of its ongoing effort to improve and standardize the animal health supplement industry, NASC initiated its Quality Seal Program. The entire line of Phycox® Joint Supplements carries the NASC Quality Seal from the National Animal Supplement Council. The Seal is a way for pet owners to know that when they buy a product carrying the seal, the product is made by a reputable company that has successfully completed a facility audit, and implemented specific quality standards. NASC members must agree to adhere to NASC's standards, including routine, independent audits to ensure conformance with the quality system requirements. Further information about NASC is available at https://nasc.cc/.