The Recommended Dietary Allowance (RDA) for vitamin C depends on a handful of factors, including age and sex (for adults): 19 years and older: 90 mg for men, 75 mg for women (85 mg when pregnant and ...

It was an oral dose of vitamin C.” About 25 years ago, UI researchers started to test the reaction that individual cancer cells had to high doses of vitamin C, and it worked well in removing cancer.