21st Century Vitamin C Acid Free C 1000mg 50's

21st Century Vitamin C Acid Free C 1000mg 50's: Derived from calcium ascorbate. A natural form of vitamin C. Calcium ascorbate is not acidic, therefore, people can take larger amounts without gastric upsets or diarrhea.

Equally important is that calcium ascorbate replenishes the calcium that is excreted in the urine due to the chelating properties of vitamin C.