{"product_id":"endur-c-sr-500mg-90-tablets-endurance-products","title":"Endur-C  SR 500mg 90 Tablets by Endurance Products","description":"\u003cp\u003e\u003cstrong\u003eEndur-C SR 500mg 90 Tablets by Endurance Products\u003c\/strong\u003e 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.\u003c\/p\u003e\n\n\u003ch2\u003eKey Benefits of Endur-C Sustained-Release Vitamin C with Rose Hips\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eImmune System Support:\u003c\/strong\u003e 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAntioxidant Defense:\u003c\/strong\u003e As a potent water-soluble antioxidant, vitamin C promotes neutralization of free radicals and supports cellular protection against oxidative stress throughout the body.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnective Tissue and Collagen Synthesis Support:\u003c\/strong\u003e Vitamin C is a required cofactor for collagen biosynthesis, supporting the structural integrity of skin, cartilage, tendons, blood vessels, and bone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCardiovascular Function Support:\u003c\/strong\u003e Promotes healthy endothelial function and supports vascular integrity as part of a comprehensive cardiovascular wellness protocol.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRose Hips Complex:\u003c\/strong\u003e Includes rose hips as a natural source of vitamin C bioflavonoids and phytonutrients that may support the bioavailability and antioxidant activity of ascorbic acid.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmartMatrix Sustained-Release Technology:\u003c\/strong\u003e 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVegan and Vegetarian Friendly:\u003c\/strong\u003e Formulated with vegetable-sourced wax and stearic acid, free from animal-derived ingredients.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy This Formula Matters\u003c\/h2\u003e\n\u003cp\u003eVitamin 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.\u003c\/p\u003e\n\n\u003ch2\u003eDietary and Quality Standards\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e500mg vitamin C (as ascorbic acid with rose hips) per sustained-release tablet\u003c\/li\u003e\n\u003cli\u003eSmartMatrix proprietary wax-matrix sustained-release technology\u003c\/li\u003e\n\u003cli\u003eReleases vitamin C gradually over 5 to 7 hours\u003c\/li\u003e\n\u003cli\u003eGluten-Free\u003c\/li\u003e\n\u003cli\u003eVegan and Vegetarian\u003c\/li\u003e\n\u003cli\u003eFree from milk, egg, fish, shellfish, soy, peanuts, tree nuts, and wheat\u003c\/li\u003e\n\u003cli\u003eNo salt, sugar, starch, preservatives, artificial colors, or flavorings\u003c\/li\u003e\n\u003cli\u003e90 tablets per bottle\u003c\/li\u003e\n\u003cli\u003eManufactured by Endurance Products Company, a US-based sustained-release tablet specialist\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat is sustained-release vitamin C and how does it differ from standard vitamin C supplements?\u003c\/h3\u003e\n\u003cp\u003eSustained-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.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the role of rose hips in this formula?\u003c\/h3\u003e\n\u003cp\u003eRose 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.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I take Endur-C SR 500mg?\u003c\/h3\u003e\n\u003cp\u003eTake 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.\u003c\/p\u003e\n\n\u003ch3\u003eWhat are the other ingredients in Endur-C SR?\u003c\/h3\u003e\n\u003cp\u003eOther 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.\u003c\/p\u003e\n\n\u003ch3\u003eIs Endur-C SR suitable for vegans and vegetarians?\u003c\/h3\u003e\n\u003cp\u003eYes. 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.\u003c\/p\u003e\n\n\u003ch3\u003eWho should consult a healthcare professional before use?\u003c\/h3\u003e\n\u003cp\u003eIndividuals 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.\u003c\/p\u003e","brand":"Endurance Products","offers":[{"title":"Default Title","offer_id":53940934115512,"sku":"EP1003","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0217\/3199\/9816\/files\/Endur-C_SR_500mg_90_Tablets_by_Endurance_Products.webp?v=1787075331","url":"https:\/\/blueskyvitamin.com\/products\/endur-c-sr-500mg-90-tablets-endurance-products","provider":"Blue Sky Vitamin","version":"1.0","type":"link"}