{"product_id":"endur-c-sr-1000mg-90-tablets-endurance-products","title":"Endur-C SR 1000mg 90 Tablets by Endurance Products","description":"\u003cp\u003e\u003cstrong\u003eEndur-C SR 1000mg 90 Tablets by Endurance Products\u003c\/strong\u003e delivers 1000mg 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 at a higher potency dose.\u003c\/p\u003e\n\n\u003ch2\u003eKey Benefits of Endur-C SR 1000mg Sustained-Release Vitamin C with Rose Hips\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Potency Immune System Support:\u003c\/strong\u003e Delivers 1000mg of vitamin C per tablet to support the structural and functional components of both the innate and adaptive immune systems, promoting the body's natural defense mechanisms at a clinically relevant dose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAntioxidant Defense:\u003c\/strong\u003e As a potent water-soluble antioxidant, vitamin C at 1000mg promotes robust 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 at every dose.\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 complement the ascorbic acid content and support the antioxidant activity of the formula.\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 and reducing urinary loss compared to immediate-release 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 supplemental intake essential for maintaining optimal ascorbate status, particularly for individuals with elevated oxidative stress, immune demands, or connective tissue support needs. At the 1000mg dose, immediate-release vitamin C supplements are absorbed rapidly but may result in transient plasma peaks followed by significant urinary excretion before tissues can fully utilize the available ascorbate. Endur-C SR 1000mg addresses this through SmartMatrix sustained-release technology, which extends vitamin C release over 5 to 7 hours to support more consistent tissue saturation, reduce urinary loss, and promote sustained antioxidant and immune activity throughout the day without the gastrointestinal discomfort sometimes associated with high single-dose immediate-release vitamin C.\u003c\/p\u003e\n\n\u003ch2\u003eDietary and Quality Standards\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1000mg 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\u003eHow does Endur-C SR 1000mg differ from the 500mg version?\u003c\/h3\u003e\n\u003cp\u003eEndur-C SR 1000mg delivers twice the vitamin C per tablet compared to the 500mg version, making it well-suited for individuals with higher daily vitamin C requirements, those under increased oxidative or immune stress, or those following a healthcare provider's protocol that calls for a higher potency dose. Both versions use the same SmartMatrix sustained-release technology and rose hips complex. The appropriate dose should always be determined in consultation with a qualified healthcare professional.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is sustained-release vitamin C and how does it differ from standard vitamin C?\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 and reducing the urinary loss associated with high single-dose immediate-release formulations.\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 1000mg?\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 1000mg?\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\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. Individuals with a history of kidney stones should discuss high-dose vitamin C supplementation with their healthcare provider before use. Keep out of reach of children.\u003c\/p\u003e","brand":"Endurance Products","offers":[{"title":"Default Title","offer_id":53940956987576,"sku":"EP1004","price":24.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0217\/3199\/9816\/files\/Endur-C_SR_1000mg_90_Tablets_by_Endurance_Products.webp?v=1787076087","url":"https:\/\/blueskyvitamin.com\/products\/endur-c-sr-1000mg-90-tablets-endurance-products","provider":"Blue Sky Vitamin","version":"1.0","type":"link"}