Adults should be cautious not to exceed 4,000 international units (IU) of vitamin D per day to avoid harmful side effects. (Photo: Getty Images) Dr Gaurav Prakash Bhardwaj, Director, Sports Injury, ...
Participants were randomized into one of four groups, receiving either 200, 1000, 2,000, or 4,000 international units (IU) per day of vitamin D3 supplementation. Blood levels of the markers of ...
Taking too much vitamin D long term can lead to hypercalcemia, an excess of calcium in the body, which can cause problems with your heart, kidneys and bones. 4,000 IU or 100 mcg is considered to ...