Medically reviewed by Jonathan Purtell, RDNMedically reviewed by Jonathan Purtell, RDN Taking too much vitamin ... of vitamin D3 in doses ranging from 5,000 to 50,000 IU appears safe when taken ...

The ultraviolet (UV) rays from sunlight convert cholesterol in your skin into vitamin D3 ... too much vitamin D, toxicity is very rare. In fact, you would need to take extremely high doses of ...

5 mcg = 200 IU. 10 mcg = 400 IU. 15 mcg = 600 IU. 20 mcg = 800 IU. It is much easier ... is true for vitamin D levels. Clinicians should not suggest high intakes of vitamin D (5,000 IU for example ...

"But the body is smart enough that it doesn't convert all that to vitamin A," Rosenbloom explains. If you're taking a multivitamin that contains 5,000 IU ... had taken too much vitamin C.

A recent study suggests that taking a vitamin D supplement could lower your risk for dementia as you age, especially for ...

If you have too much vitamin D in your blood, your blood calcium levels should also be assessed. Normal blood calcium levels are 8.4 to 10.2 milligrams per deciliter (mg/dL).

Pure Encapsulations Vitamin D3 gets our pick as the best high dose vitamin D option because it’s third-party tested and provides 10,000 IU per serving. If you have a severe vitamin D deficiency ...