Medically reviewed by Soma Mandal, MD A vitamin D test measures your blood's vitamin D levels to see if they are too high or too low. Low vitamin D levels can increase your risk of bone disease and ...

Taking too much vitamin D can cause nausea, vomiting, weakness, and bone pain. Over time, vitamin D toxicity may cause heart ...

Vitamin D tests involve taking a blood sample to measure the vitamin D levels in your bloodstream. There are two forms of vitamin D in the blood: 25-hydroxy vitamin D, or calcidiol, and 1,25-dihydroxy ...

They may recommend taking a high dose of vitamin D for the first few weeks just to try and get you back to normal. You’ll want to test again about six months later to see if that supplementation was ...

Vitamin D helps the body absorb calcium, build strong muscles, maintain a healthy immune system, and prevent neurodegenerative conditions.

“However, we discovered that vitamin D2 supplements can actually decrease levels of vitamin D3 in the body, which is a ...

Summer is certainly the most carefree season of the year, but fall is when everything gets back on track. Routines are ...

Historically, 400 IU (10 ug) of vitamin D was recommended for better health because it closely approximated the amount of vitamin D in a teaspoonful of cod liver oil. However, 800 to 1,000 IU is the ...

DEAR DR. ROACH: I recently turned 65 and changed primary doctors because my previous doctor did not accept Medicare patients.

When most people think about vitamin D, they often associate it with bone health or preventing rickets in children. Yet, this ...

When exposed to sunlight, your body manufactures vitamin D using a type of cholesterol. (Yes, even a certain amount of cholesterol is necessary for good health!) This is why vitamin D is often ...

We know vitamin D is important for our overall health, especially when it comes to maintaining strong bones, but did you know it also plays a key role in brain health? While there’s no proven method ...