Solaray Reacta-C may help provide fast-acting, long-lasting vitamin C support day and night. Stomach Friendly Non-acidic and gentle on the stomach, our formula contains a nutrient-rich complex of strontium and calcium ascorbate, plus l-threonate. 24-Hour Support Patented formula provides 200mg of citrus bioflavonoids, plus a synergistic support base of hesperidin, rutin and acerola. Read more Reacta-C Vitamin C 500 mg with Bioflavonoids Nobody can afford to feel under the weather any time of the year. Looking to develop a vitamin C formula that just works better, Solaray created this nutrient rich complex of strontium ascorbate and calcium ascorbate with l-threonate. The result is a non-acidic form of vitamin C designed to be fast-acting and long-lasting, while being gentle on the stomach. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease. Rest assured, only the best products reach your family’s cabinet! Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt.