Endurance Products Company

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

It all started with a simple idea. Terry Hammerschmidt, the technical director and formulator for a regional pharmaceutical company, wanted to develop sustained release dietary supplements so that consumers would be getting all they were paying for. If a supplement company could deliver a truly superior quality product – and had a method of release that mimicked actual digestion – consumers would continue to come back.

How We’re Different

Making A Better Sustained Release Tablet 

Ordinary capsule formulations often miss the mark. Many use time-release beadlet delivery systems, which can be fickle. Each active ingredient beadlet is covered with a core made up of inert ingredients of varying thickness. Ideally, the beadlets dissolve at different rates, thereby releasing the active ingredient steadily over time.

In reality, after the capsule bursts in the stomach, the large beadlets remain there for about one to three hours as the outer shell dissolves, but the smaller ones dump into the intestine immediately. One problem is that the beadlets can get caught in the small intestine. Another problem is manufacturers can “cheat” and make products with more of the bigger beadlets to cut costs, resulting in a product that doesn’t release active ingredients properly.

By contrast, our sustained release and extended release wax matrix tablet delivery mimics food digestion by releasing nutrients in a slow and steady manner for optimal absorption into the bloodstream and retention in the body.

This innovative process starts with a wax matrix derived from natural vegetable sources. The nature of the matrix allows nutrients to be evenly embedded throughout the tablet structure. The nutrient-matrix blend is then compressed into tablets using a special cold-extrusion process (a jumble of words which basically mean putting an object through a machine to get it into a certain shape).

This process is not only free of heat but is also free of moisture and solvents, which further protects the stability of our product. Thanks to this proprietary process, a coating solution (which typically contains sugar, starch, artificial colors or other undesirable ingredients) is unnecessary.

The result is a clean tablet with a uniform, controlled release of nutrients. It's an advanced delivery technology that university researchers, healthcare professionals, and consumers alike have been relying on for decades to meet nutritional needs. As with all Endurance products, the entire manufacturing process– from raw materials to finished tablet – meets strict current Good Manufacturing Practices.

Meet Our Team



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

Endurance Products Company