Vitamin C is considered to be the most useful of all vitamins for overall health maintenance. Its main source in the diet is from fruit (especially citrus) and vegetables. It is an anti-oxidant and is essential in important functions including absorption of iron. There has been considerable research on Vitamin C and that humans need it in their diet is established. Bio-Health’s Pure-fil capsules contain Vitamin C bonded with Calcium, making it non-acidic. The preparation will not cause stomach, intestinal or urinary tract distress as Vitamin C sometimes can and the Calcium content also helps to ensure the body’s reserves are not depleted.