Endur-C SR 500mg 90 Tablets by Endurance Products delivers 500mg of vitamin C with rose hips in a SmartMatrix sustained-release tablet designed to release ascorbic acid gradually over 5 to 7 hours, supporting sustained immune function, antioxidant defense, and connective tissue integrity throughout the day.
Key Benefits of Endur-C Sustained-Release Vitamin C with Rose Hips
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Immune System Support: Vitamin C is an essential nutrient that supports the structural and functional components of both the innate and adaptive immune systems, promoting the body's natural defense mechanisms.
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Antioxidant Defense: As a potent water-soluble antioxidant, vitamin C promotes neutralization of free radicals and supports cellular protection against oxidative stress throughout the body.
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Connective Tissue and Collagen Synthesis Support: Vitamin C is a required cofactor for collagen biosynthesis, supporting the structural integrity of skin, cartilage, tendons, blood vessels, and bone.
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Cardiovascular Function Support: Promotes healthy endothelial function and supports vascular integrity as part of a comprehensive cardiovascular wellness protocol.
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Rose Hips Complex: Includes rose hips as a natural source of vitamin C bioflavonoids and phytonutrients that may support the bioavailability and antioxidant activity of ascorbic acid.
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SmartMatrix Sustained-Release Technology: Endurance Products Company's proprietary wax-matrix tablet releases vitamin C gradually over 5 to 7 hours, supporting more consistent plasma ascorbate levels compared to immediate-release vitamin C formulations.
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Vegan and Vegetarian Friendly: Formulated with vegetable-sourced wax and stearic acid, free from animal-derived ingredients.
Why This Formula Matters
Vitamin C is a water-soluble nutrient that the body cannot synthesize endogenously, making consistent dietary or supplemental intake essential for maintaining optimal ascorbate status. Immediate-release vitamin C supplements are absorbed rapidly but may result in transient plasma peaks followed by urinary excretion before tissues can fully utilize the available ascorbate. Endur-C addresses this through SmartMatrix sustained-release technology, which extends vitamin C release over 5 to 7 hours to support more consistent tissue saturation and reduce the urinary loss associated with high single-dose immediate-release formulations. The inclusion of rose hips provides complementary phytonutrients that support the broader antioxidant and immune-supportive activity of the formula.
Dietary and Quality Standards
- 500mg vitamin C (as ascorbic acid with rose hips) per sustained-release tablet
- SmartMatrix proprietary wax-matrix sustained-release technology
- Releases vitamin C gradually over 5 to 7 hours
- Gluten-Free
- Vegan and Vegetarian
- Free from milk, egg, fish, shellfish, soy, peanuts, tree nuts, and wheat
- No salt, sugar, starch, preservatives, artificial colors, or flavorings
- 90 tablets per bottle
- Manufactured by Endurance Products Company, a US-based sustained-release tablet specialist
Frequently Asked Questions
What is sustained-release vitamin C and how does it differ from standard vitamin C supplements?
Sustained-release vitamin C is formulated to release ascorbic acid gradually over several hours rather than all at once. Standard immediate-release vitamin C is absorbed rapidly, which can result in a sharp rise in plasma ascorbate followed by urinary excretion before tissues can fully utilize the available nutrient. The SmartMatrix sustained-release format used in Endur-C is designed to extend this release over 5 to 7 hours, supporting more consistent plasma and tissue ascorbate levels throughout the day.
What is the role of rose hips in this formula?
Rose hips are the fruit of the Rosa canina plant and serve as a natural source of vitamin C along with bioflavonoids and other phytonutrients. In Endur-C, rose hips complement the ascorbic acid content and contribute plant-derived compounds that may support the antioxidant and immune-supportive activity of the overall formula.
How do I take Endur-C SR 500mg?
Take one tablet daily, preferably with a meal, or as directed by a qualified healthcare professional. Do not crush or chew the sustained-release tablet, as this will disrupt the SmartMatrix delivery mechanism and result in immediate rather than extended release of the vitamin C content.
What are the other ingredients in Endur-C SR?
Other ingredients include vegetable wax (rice bran and/or carnauba), stearic acid (vegetable), magnesium stearate (vegetable), and silica. The formula does not contain milk, egg, fish, shellfish, soy, peanuts, tree nuts, wheat, salt, sugar, starch, preservatives, artificial colors, or flavorings.
Is Endur-C SR suitable for vegans and vegetarians?
Yes. Endur-C SR is formulated with vegetable-sourced wax and stearic acid and does not contain any animal-derived ingredients, making it suitable for both vegan and vegetarian lifestyles.
Who should consult a healthcare professional before use?
Individuals with a known medical condition, those taking prescription medications, and pregnant or nursing women should consult a qualified healthcare professional prior to use. Keep out of reach of children.
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.
