Vitamin C500 + Calcium (2 in 1) provides two forms of vitamin C: ascorbic acid and calcium ascorbate.
Calcium ascorbate is a slow form of vitamin C. This allows for the supply and continued use of vitamin C on a daily basis, ascorbic acid being rapidly depleted from cells without calcium ascorbate. Thus, ascorbic acid from Vitamin C500 + Calcium (2 in 1) provides you with a proper supply of vitamin C at a high absorption rate.