The effects of saccharin on the metabolism of dietary tryptophan to indole, a known cocarcinogen for the urinary bladder of the rat.


Adult male rats were fed diets containing 0 to 10% saccharin, 2% tryptophan, or 2% tryptophan plus 5% saccharin ad libitum for 1 to 2 months. Saccharin produced a dose-related increase in the urinary excretion of indican which is the main metabolite of indole. The renal clearances of both indican and saccharin were reduced at high plasma concentrations (200… (More)


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