ANSSS
For other languages,
please click language triangle.
 
 中文-繁 
 
More
knowledge
 

How much is too much for vitamins and minerals?

What it takes to overdose on vitamins and minerals.
Source: Institute of Medicine and the Office of Dietary Supplements, National Institutes of Health.

Nutrient
Recommended daily intake
Safe upper limit (all sources)
  Men Women  
Vitamin A 3,000 IU 2,300 IU 10,000 IU
Niacin (B3) 16 mg 14 mg 35 mg
Folate (folic acid) 400 mcg 400 mcg 1,000 mcg
Vitamin C 90 mg 75 mg 2,000 mg
Vitamin D 600 IU ages 19 to 70;
800 IU ages 71 and up
600 IU ages 19 to 70;
800 IU ages 71 and up
 
Vitamin E 22 IU (natural)
33 IU (synthetic)
22 IU (natural)
33 IU (synthetic)
1,500 IU (natural)
1,100 IU (synthetic)
Vitamin K 120 mcg 90 mcg Not established
 
MINERALS
Calcium 1,000 mg ages 19 to 70;
1,200 mg ages 70 and up
1,000 mg ages 19 to 50;
1,200 mg ages 51 and up
2,500 mg through age 50;
2,000 mg ages 51 and up
Magnesium 420 mg 320 mg 350 mg
(from supplements only)
Potassium 4,700 mg 4,700 mg Not established
Selenium 55 mcg 55 mcg 400 mcg
Zinc 11 mg 8 mg 40 mg
Note: A version of this article appeared in the September 2012 issue of Consumer Reports magazine
with the headline "Vitamins & Supplements."
▲ Back to Top
American Nutrition Supplements BioTech, Inc. 美國天然營養品生技公司