Our expert says:
Vitamin C or ascorbic acid, either in its natural form in foods (citrus fruits, guavas, cabbage, broccoli, etc) or in tablet form does not contribute to weight gain. There is some evidence that taking massive doses of vit C tablets can cause kidney stones. Adults need about 100 mg of vit C a day (a glass of orange juice or 1 grapefruit), so taking thousands of mg regularly may cause kidney problems. It is always preferable to obtain our vitamins and minerals from whole foods and not from tablets. Other vitamins which should not be taken in excess in tablet form are vit A (this can lead to a condition called hypervitaminosis A which can cause irreversible organ and joint damage and may increase fatalities) and niacin (which can interfere with peptic ulcers and cause liver problems). If you are eating a health, balanced diet and do not have an identified deficiency, then it is not really necessary to take vitamins and minerals in tablet form and if you do, then having one multivitamin and mineral tablet every 2nd or 3rd day should be more than sufficient.
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