BOSTON, MASSACHUSETTS. The US National Academy of Sciences has released new recommendations for the daily intakes of vitamins and minerals. One major change concerns vitamin A. It was previously thought that darkly colored fruits and vegetables could provide adequate amounts of vitamin A through conversion of carotenoids. This has now been found to be untrue. Carotenoids are only converted to vitamin A at half the rate previously thought, so vegetarians in particular may need to increase their intake of vitamin A from other sources. The new recommendations also, for the first time, list tolerable upper intake levels (ULs) for many vitamins and minerals.
Recommended daily intakes (ULs in brackets) for adults in good health are as follows:
The report specifically points out that the recommendations are designed "to meet the needs of individuals in
the United States and Canada who are healthy and free from specific disease or conditions that may alter
their daily nutritional requirements."