Washington, Nov 17: Long term vitamin E or vitamin C supplementation has no significant effect in protecting against cancer, according to a new study.
The Physicians'' Health Study II is a large-scale, long-term, randomised clinical trial, which was conducted by 14,641 physicians who were at least 50 years old at enrollment.
All the physicians participating in the study were given 400 IU of vitamin E every other day or its placebo, or 500 mg of vitamin C daily or its placebo.
The subjects were followed for up to 10 years for the development of cancer with high rates of completion of annual questionnaires, and the confirmation of reported cancer endpoints.