HOW MUCH VITAMIN D? You’ve seen the blogs and headlines. It
seems like everyone is warning us about the dangers of vitamin D
deficiency. And some experts make it sound like it’s almost
impossible to get too much vitamin D. I have tried to report to
you some of the excitement and controversy in the vitamin D
field in my previous “Tips From the Professor” Just to review:
In 2010, the Food & Nutrition Board of the Institute of Medicine
set the RDA for vitamin D as 600 IU between the ages of 1 and 70
and 800 IU over 70. The Food and Nutrition Board set 4,000
IU/day as the Tolerable Upper Intake Limit. In plain English,
that means that daily intakes above 4,000 IU/day have the
potential to be toxic in some individuals. I pointed out to you
that the RDAs were based primarily on the amount of vitamin D
needed for healthy bones. While there is emerging evidence that
higher intakes of vitamin D may be helpful for a strong immune
system and for reducing the risk of heart disease, cancer,
diabetes and autoimmune disease