Zinc has been popular as a supplement, but claims that it shortens colds appear to be unfounded.
By the numbers
Suggested daily intakes of these five vitamins and minerals:
- Iron: Men, 8 mg; women: premenopause, 18 mg; if pregnant, 27 mg; postmenopause: 8 mg; upper limit, 45 mg
- Zinc: Men, 11 mg; women, 8 mg; upper limit, 40 mg
- Vitamin K: Men, 120 mcg; women, 90 mcg; no upper limit
- Selenium: Men and women, 55 mcg; upper limit, 400 mcg
Vitamin D: Men and women, age 50 and younger, 200 IU; ages 51 to 70, 400 IU; ages 71 and older, 600 IU; upper limit, 2,000 IU