Vitamin D plays an important role in the body, supporting healthy bones, calcium absorption, muscle function, and normal immune activity. While getting enough is important, taking too much through supplements can cause problems. Vitamin D toxicity is uncommon and is usually linked to consistently taking very high doses rather than ordinary sunlight exposure or food.

Too much vitamin D can cause calcium levels in the blood to rise, a condition known as hypercalcemia. Possible warning signs may include unusual thirst, frequent urination, nausea, vomiting, poor appetite, constipation, dehydration, weakness, or confusion. In more serious situations, excessive calcium may contribute to kidney stones, kidney damage, abnormal heart rhythms, and other complications.

For most adults, the recommended daily intake is around 600 IU, increasing to 800 IU for adults over 70. The usual upper intake level for adults is 4,000 IU per day from all sources. Higher amounts may sometimes be recommended to treat a documented deficiency, but these doses are best used with appropriate medical guidance. It is also easy to overlook vitamin D coming from multiple sources, such as multivitamins, calcium products, fortified foods, and separate vitamin D supplements.

It’s important to remember that symptoms associated with vitamin D toxicity can have many other causes, so they do not automatically mean that vitamin D is responsible. If you are taking high-dose supplements and develop concerning symptoms, speak with a healthcare professional rather than assuming the cause or changing a prescribed treatment on your own. When needed, a clinician can evaluate your symptoms and check relevant blood levels. Vitamin D can be valuable for health, but when it comes to supplements, more is not necessarily better.READ MORE BELOW…