Rumour: There are no negative side effects of excess vitamin D supplementation.
Truth: This is false.
Although vitamin D is essential for the body to function, a study in the American Journal of Clinical Nutrition reported that excess vitamin D supplementation is linked to an increase in calcium levels in the blood and an increased risk of kidney stones. Read more about the negative impacts of too much vitamin D here.
- Malihi Z, Wu Z, Stewart AW, Lawes CM, Scragg R. Hypercalcemia, hypercalciuria, and kidney stones in long-term studies of Vitamin D Supplementation: A systematic review and meta-analysis. The American Journal of Clinical Nutrition. 2016;104(4):1039-1051. doi:10.3945/ajcn.116.134981