It is usually taken dissolved in water or juice. Vitamin C should be used with caution by persons with gout or kidney failure since it may cause uric acid stones in the former and calcium oxalate stones in the later. Clients over age 45 should be advised to stop taking vitamin C for at least 3 days if they are to undergo screening for colon cancer. Vitamin C supplement can interfere with the accuracy of this test. Vitamin E Vitamin E is an anti-oxidant that can protect experimental animals against some toxic substances.
Vitamin E can help block the formation of nitosamines from substances found in tobacco smoke.
Vitamin E also seems to protect both lung tissue and the vitamin A in your body from the effects of other oxidants in tobacco smoke. Vitamin E-deficient rats are more sensitive to damage by cigarette smoke. Large amounts of vitamin E can help protect experimental animals from polluted air, probably because it protects the unsaturated fatty acids in the lung tissue from oxidation. Vitamin E also potentiates the tumor-inhibiting ability of the mineral selenium. Vitamin E may also help inhibit a precancerous breast condition in humans.