{"product_id":"endur-c-sr-1000-mg-60-tablets","title":"ENDUR-C SR 1000 mg 60 Tablets","description":"\u003ch2\u003eENDUR-C SR 1000mg — Sustained Release Vitamin C with Rose Hips for All-Day Immune and Antioxidant Support\u003c\/h2\u003e\u003cp\u003eENDUR-C SR 1000mg from Endurance Products Company delivers vitamin C with rose hips in a proprietary vegetable wax matrix tablet that releases vitamin C gradually over 5–7 hours — addressing the fundamental pharmacokinetic challenge of oral vitamin C supplementation. Vitamin C has a very short plasma half-life (approximately 30 minutes at saturation) and is subject to intestinal absorption saturation above approximately 200mg per dose, meaning a large immediate-release vitamin C tablet is largely wasted: the spike in gut concentration outpaces absorption capacity, and most of the dose is excreted before the plasma level can be sustained.\u003c\/p\u003e\u003cp\u003eSustained-release delivery transforms the pharmacokinetics of vitamin C supplementation. By releasing 1,000mg over 5–7 hours, ENDUR-C SR maintains vitamin C availability at the gut absorption site below the saturation threshold continuously throughout the release period — dramatically increasing the total absorbed dose compared to the same 1,000mg taken as an immediate-release tablet. This translates to more sustained plasma vitamin C levels throughout the day for ongoing immune support, collagen synthesis, neurotransmitter production, antioxidant defense, and adrenal support. The addition of rose hips provides natural bioflavonoids that may enhance vitamin C bioavailability and provide complementary antioxidant activity.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVitamin C 1,000mg per tablet\u003c\/strong\u003e with rose hips bioflavonoids\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVegetable wax matrix sustained release over 5–7 hours\u003c\/strong\u003e — maximizes absorbed dose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintained plasma vitamin C levels\u003c\/strong\u003e vs. peak-and-crash of immediate release\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced GI discomfort\u003c\/strong\u003e at high doses vs. immediate-release vitamin C\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e60 tablets; vegan, gluten-free\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eTake 1 tablet daily with food, or as directed by your healthcare provider.\u003c\/p\u003e","brand":"Endurance Products Company","offers":[{"title":"Default Title","offer_id":51252288586030,"sku":"000000000300084659","price":12.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/3297\/1822\/files\/515x515-0005659-endur-c-sr-1000-mg-60-tablets.png?v=1779658589","url":"https:\/\/www.drmattgianforte.com\/products\/endur-c-sr-1000-mg-60-tablets","provider":"Dr Matt Gianforte","version":"1.0","type":"link"}