
About Endurance Products Co.
A trusted source of quality dietary supplements since 1978, we specialize in sustained-release and extended-release tablets that feature a unique vegetable wax matrix for optimal absorption and retention.
Our Mission
Endurance Products Company provides extended-release and sustained-release dietary supplements that release nutrients over hours for maximum absorption, less waste, and fewer side effects.
This controlled release of nutrients mimics the body’s natural digestion. When we eat, our bodies process food over six to eight hours. Nutrients are absorbed by the small intestine and passed into the bloodstream. Blood carries the nutrients to the liver, where they’re processed and stored for when the body needs them.
Our sustained-release supplements are formulated to do the same. Nutrients are embedded in a tablet matrix (core) made of vegetable wax. It releases nutrients over five to eight hours. This slow, steady release of nutrients allows the body to absorb and use the most of the supplement. It also minimizes side effects like nausea.
Benefits of Extended-Release Supplements
• Gentle on the stomach, easy to digest
• Minimizes flushing associated with niacin (nicotinic acid)
• Cost-effective as fewer nutrients are wasted through urine
• You don’t need to take multiple servings throughout the day
• No solvents, cellulose, sugar coating, starch, or artificial colors
Our founder, biochemist Terry Hammerschmidt, developed this innovative sustained-release technology in the late 1960s. As a technical director and formulator for a regional pharmaceutical company, he saw the benefits of controlled-release medications and created similar technology for water-soluble nutrients.
Joe Brunner partnered with Hammerschmidt in 2001. Brunner and his family continue to produce the highest-quality dietary supplements.
Endurance Product’s Oregon-based manufacturing and packaging facilities meet strict FDA Current Good Manufacturing Practices (cGMP) requirements. Our facility, equipment, materials, personnel, and processes are inspected and certified annually by a third party, UL Verification Services.
Who We Are
How We’re Different
Making A Better Sustained Release Tablet
Meet Our Team
Sustained-Release
Long Lasting

Releases over time for optimal absorption
Saves You Money

More absorption = less waste
Inspired by Your Body

Mimics how your body naturally processes food
Reduces Nausea

Gentle and gradual release
Providing high-quality, sustained-release supplements since 1978
Only What You Need

No salt, sugar, starch, artificial colors or flavorings, or preservatives
Easy to Swallow

The shape and size of our tablets makes them easy to take your supplements
Backed by Science

Backed by a portfolio of clinical research
