Vitamins and Minerals | The Nutrition Source | Harvard T.H. Chan …
https://www.hsph.harvard.edu/nutritionsource/vitamins/
WebRecommended Dietary Allowance (RDA) or Daily Adequate Intake (AI)* Upper Limit: Women: Men: Vitamin A (preformed = retinol; beta-carotene can be converted to Vitamin A) 700 micrograms (2,333 IU) 900 micrograms (3,000 IU) 3,000 micrograms (about 10,000 IU) Thiamin (vitamin B1) 1.1 milligrams: 1.2 milligrams: Not known: Riboflavin (vitamin B2) 1. ...
DA: 51 PA: 39 MOZ Rank: 5