The organisation says the main consequence of vitamin D toxicity is a buildup of calcium in your blood (hypercalcemia), which can cause nausea and vomiting, weakness, and frequent urination.
It adds: “Vitamin D toxicity might progress to bone pain and kidney problems, such as the formation of calcium stones.”
The Cleveland Clinic says: “Do not take higher-than-recommended doses of vitamin D without first discussing it with your doctor.
“However, your doctor might recommend higher doses of vitamin D if he or she is checking your blood levels and adjusting your dose accordingly.