Vitamin C (ascorbic acid) is a vitamin that plays an important role in the immune system and various other physical processes. Rosehips are a natural source of vitamin C, while bioflavanoids help support the absorption and activity of ascorbic acid. * Usage Take one or two tablets a day with water, preferably with a meal. Ingredients One bottle contains 90 tablets, each tablet consisting of 1000 mg vitamin C (ascorbic acid), 100 mg rosehips extract and 50 mg bioflavanoid complex. The 1000 mg of vitamin C is sometimes considered a high dosage (1667% Recommended Daily Allowance) although from an orthomolecular perspective it's a regular dose that may be ingested several times a day