Vitamin D works to maintain normal levels of calcium and phosphorus in the blood and contributes to maintenance of strong bones. The National Library of Medicine (NLM) reports that recent research suggests that it may also provide protection for various diseases, including cancer, osteoporosis, high blood pressure and certain autoimmune diseases. vitamin D toxicity refers to when there is too much vitamin D in your body. Vitamin D toxicity can be serious but is treatable.
Those at Particular Risk for Side Effects
Certain people are at higher risk for vitamin D toxicity. People who are at particular risk are those who suffer from hyperparathyroidism, kidney disease, sarcoidosis, histoplasmosis or tuberculosis.
Hypercalcemia
Chronic hypercalcemia is when your body consistently has too much calcium, which can happen if you take too much vitamin D. This can lead to serious, life-threatening complications and needs to be treated by a medical professional, according to NLM. Signs of hypercalcemia can include nausea, vomiting, loss of weight and/or appetite, excess urination or thirst, weakness or fatigue, sleep disruptions, headache, dry or metallic taste in mouth, balance issues and ringing in the ears. Mayo Clinic reports that constipation, confusion, abnormal heart rhythm and kidney stones can also be side effects of hypercalcemia.
Kidney Side Effects
If you regularly take vitamin D in excess, it can negatively effect your kidney. NLM reports that too much vitamin D can lead to impairment of the function of your kidneys and to calcium deposits forming in organs throughout your body. It can also lead to atherosclerosis, or hardening of the arteries.
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