"Is 10,000 mg of Vitamin A too much to take
per day? I am 69, happy and healthy and exercise 1
hour daily. "
Evelyn
Originally the recommended daily allowance (RDA)
requirements of vitamins and minerals developed by
the National Academy of Science's Food and Nutrition
Board were set at levels just to prevent deficiency
states. There is more and more evidence, however,
that higher doses of these nutrients can be beneficial
in preventing diseases and improving overall health.
Another organization, the Council for Responsible
Nutrition, has tried to look at how much extra vitamin
and mineral supplements can be taken. For this, they
have tried to look at the literature to find:
NOAEL - the intake level at which there are no credibly-substantiated
adverse reactions observed in humans;
LOAEL - the lowest intake at which some adverse effects
have occurred under certain circumstances. (For many
vitamins, there simply are no reports or too few reports
of adverse effects at any level and, therefore, no
LOAEL number can be identified.)
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