This is what I take, natural product of acerola cherries-
Support your immune system† Plant-based supplement with 500 mg of vitamin C for all-day immune support.† Made with acerola cherries, one of nature's most concentrated forms of vitamin C, grown on our own farms. Slow, steady release over an 8-hour period for improved utilization of vitamin C. Includes ascorbic acid and phytonutrients that provide antioxidant protection from free radicals. † Scientific research has shown that vitamin C plays an important role in maintaining healthy tissues and supporting immune system function. A daily serving provides more vitamin C than the equivalent of seven oranges, 16 lemons, or six grapefruits. Easy-to-swallow, ideal for sensitive stomachs.