Since 1932 Innovative Quality Dietary Supplement 1 Daily Patented 24 Hour Support 250 mg Bioflavonoid Complex The Vitamin C that Works! Clear QualityDiscussion: Recta-C is a clinically researched & patented 24-hour support formula that delivers vitamin C to the body all day & night for greater immune support! This reacted complex of strontium calcium ascorbate with L-Threonate is a non-acidic formula designed to be fast-acting, long lasting and gentle on the stomach and digestive system. Bioflavonoids are included for maximum bioavailability and effectiveness. ActivTab technology guarantees tablet disintegration within 30 minutes according to USP standards.