ENDUR-C SR 1000 mg 60 Tablets

ENDUR-C SR 1000mg — Sustained Release Vitamin C with Rose Hips for All-Day Immune and Antioxidant Support

ENDUR-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.

Sustained-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.

• Vitamin C 1,000mg per tablet with rose hips bioflavonoids
• Vegetable wax matrix sustained release over 5–7 hours — maximizes absorbed dose
• Maintained plasma vitamin C levels vs. peak-and-crash of immediate release
• Reduced GI discomfort at high doses vs. immediate-release vitamin C
• 60 tablets; vegan, gluten-free

Take 1 tablet daily with food, or as directed by your healthcare provider.