Traber said she would recommend performing studies with burn victims and giving them the “tolerable upper limit” of vitamin E as defined by the National Academy of Sciences Institute of Medicine, which would be 400 I. U. per day.
Thehope is that the level ofCO2in the atmospherecanthusbekeptbelow what is widelyagreed to be the upper limit for a tolerablelevelof global warming, 450 parts per million.
The latest RDAs of vitamin D increased to 600 IU for adults up to the age of 70 and 800 IU for adults older than 70, and the tolerableupperlimit increased from 2, 000 to 4, 000 IU per day for adults.