Vitamin C Lowers Risk of Bladder Cancer
Researchers at the Fred Hutchinson Cancer Research Center report that vitamin C supplementation is highly effective in reducing the risk of bladder cancer. Their study involved 262 patients with bladder cancer (Caucasians aged 45-65 years) and 405 matched controls. The researchers determined, through the use of food frequency questionnaires and telephone interviews, that people who had supplemented with at least 500mg of vitamin C daily for 10 years had a 60 per cent lower risk of developing bladder cancer than did people who had not supplemented. Supplementation with multivitamins was also found to be highly beneficial with long-term users having a 60 per cent lower risk as well. Regular consumption of a diet rich in fruit and vegetables cuts the risk of bladder cancer in half whereas increased consumption of fried foods more than doubled it. Vitamin A (retinol), but not beta-carotene or other carotenes, was also found to be somewhat protective against the development of bladder cancer.
The researchers speculate that vitamin C in the urine may protect the bladder against oxidative inflammation of the bladder's lining and may also inhibit the formation of nitrosamines. Nitrosamines have been linked to the development of bladder cancer in several studies.
Article copyright Canadian Health Reform Products Ltd.
By Hans R. Larsen