Jun 21, 2017
By Jane Brown
It appears we may be overdoing it when it comes to vitamin D supplements, and researchers say that can lead to bone fractures, kidney stones and even an increased risk of certain cancers.
Scientists at the University of Minnesota led a team that looked at trends in the use of vitamin-D supplements, using data from 1999 through 2014.
The recommended amount of vitamin D in Canada is 600 international units per day for adults 70 and younger. Adults over 70 are advised to up the amount to 800 international units.
In 1999-2000, just 0.3 per cent of American adults exceeded one-thousand I-U-per-day, but by 2013-2014 this percentage topped out at 18.2 per cent.
And in 1999-2000, fewer than point one per cent of adults were getting 4000 I-U-per-day or more of vitamin D. but by 2013-2014, 3.2 per cent of Americans were supplementing with this megadose.
You can read about the study in the Journal of the American Medical Association.