A Smarter Way to Absorb Nutrients

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A Smarter Way to Absorb Nutrients

We’re seeing an interesting trend among the Endurance community. Customers want to know more about the advanced delivery technology deep within each controlled-release tablet. And for good reason, it’s a key feature – found only in our products – that takes your body’s ability to absorb water-soluble nutrients to a whole new level. What’s more, it’s likely powering your favorite Endurance products. If you count yourself among the curious, read on.

One discovery, so many benefits

To develop this technology, our R&D scientists took the playbook on controlled-release technology straight to the laboratory where they focused on a singular goal: How to formulate a dietary supplement with the ability to maintain an optimal tissue level of a water-soluble nutrient for a longer period of time.

The scientists researched all the usual suspects before discovering their unique solution, a vegetable-derived wax matrix. To be sure, they endured through plenty of misses, a few near hits, and then Eureka! They discovered it: a novel solution to evenly distribute a nutrient throughout a tablet so it releases in a controlled manner for optimal absorption and retention in the body. What’s more, this discovery is perfectly suited for just about every type of health-conscious consumer, including vegetarians and vegans.

Added value with a special manufacturing process

Our proprietary cold-extrusion manufacturing process adds even more value in two key ways. First, it enhances product stability by eliminating the need for heat, moisture or solvents. Second, it avoids the need for a coating solution with undesirable ingredients such as sugar, starch or artificial colors. The result? A clean formula with full potency through shelf-life.

Sustained delivery in action

ENDUR-C® with Rose Hips is a great example of our sustained-release delivery technology in action, and how it helps enhance your body’s ability to absorb and retain vitamin C so it can exert its antioxidant action and support your immune, skin and nerve health.*

By releasing small amounts of vitamin C at a time as the tablet travels through the intestine, ENDUR-C® allows your body to slowly absorb vitamin C. In this way, it not only helps maintain optimal blood and tissue levels, but avoids excess loss in the urine that’s typical of regular forms of high-dose vitamin C. ENDUR-C® also helps minimize digestive upset that some people experience with regular forms of vitamin C.*

A smarter way to deliver what your body needs

ENDUR-C® is a great way to fill any nutrient gap between what your typical diet provides and what your body demands. And, if you take certain over-the-counter or prescription drugs, be sure to talk to your doctor about the benefits of supplementation. Several common drugs, when taken over an extended period of time, can deplete your body’s vitamin C stores. These drugs include Prilosec®, Nexium® and similar anti-ulcer drugs (proton-pump inhibitors), high-dose aspirin and estrogen-containing drugs.1,2*

Of course, ENDUR-C® is just one example. Over a dozen Endurance products feature our proprietary nutrient-matrix blend to deliver a wide range of water-soluble nutrients such as niacin and other B vitamins, L-arginine, plant polyphenols, choline and glucosamine, among others. So whether you reach for Endurance products to support cholesterol metabolism, blood vessel health, joint comfort or whole body health, you can be confident that your body’s ability to absorb water-soluble nutrients is working at a whole new level.*

About Endurance Products Company

Endurance Products Company has been a trusted source of quality dietary supplements since 1978. Our sustained-release and extended-release tablets feature a unique vegetable wax matrix that releases nutrients in a slow, steady manner over a period of hours for optimal nutrient absorption and retention.


1. Hendler S, Rorvik D, eds. PDR for Nutritional Supplements. 1st Montvale, NJ: Medical Economics; 2001.

2. Mowat C, Carswell A, Wirz A, McColl KE. Omeprazole and dietary nitrate independently affect levels of vitamin C and nitrite in gastric juice. Gastroenterology. 1999;116(4):813-22. PMID: 10092303.

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 * These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.