A Founder + Family Philosophy

Endurance Products Company is a family-owned and operated business. We have been a trusted provider of quality dietary supplements since 1978, and we are proud to serve as an industry leader offering the highest quality supplements formulated with more than 45 years of research.

Our Story

Our founder, Terry Hammerschmidt, biochemist and former collegiate athlete, developed our unique sustained-release technology in the late 1960s. With experience as a technical director in the pharmaceutical industry, Terry saw the advantages of controlled-release medications and applied this concept to vitamins and supplements.

In 2001, Joe Brunner teamed up with Terry, and together, the Brunner family continues to produce top-quality dietary supplements. Our sustained-release and extended-release tablets use a special vegetable wax matrix for better absorption and retention. We are proud of the quality of our products and the extensive research that backs them. With over 46 years of experience, we are deeply passionate about supporting our customers on their journey to optimal health.

Meet Our Team