Incredible How Much Vitamin C To Prevent Sickness Advice. Your upper limit of vitamin c may vary depending whether. The recommended dietary allowance for adults 19 years and older is 90 mg daily for men and 75 mg for women.

Web the german institute for risk assessment ( bundesinstitut für risikobewertung, bfr) considers 100 milligrams. Pregnant women (aged 19 and older) 85 mg. Web so if you’re deficient in vitamin c, your immune system can certainly take a hit and make you more.