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 ...

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

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 ...

We tested the best vitamin deficiency tests from LetsGetChecked, Everlywell, and LabCorp, and our testers found them easy to use and informative. Learn more about the best vitamin deficiency tests ...

Having vitamin D absorption issues could affect your bone health. Magnesium-rich and fatty foods can improve your absorption.

How to use an at-home vitamin deficiency test For any further questions, all reputable at-home tests will have instructions and a customer care line. Most vitamin deficiency tests require a blood ...

WASHINGTON — The nation’s largest medical lab company says it recently discovered and fixed a problem that led to inaccuracies in a small number of tests for vitamin D deficiency. Quest Diagnostics of ...

The nation's largest medical lab company says it recently discovered and fixed a problem that led to inaccuracies in a small number of tests for vitamin D deficiency. Quest Diagnostics of Madison, N.J ...

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

Two new lab tests to measure blood levels of vitamin D are inaccurate more than 40% of the time, according to a new study. Researchers say newer tests tend to overestimate the number of people who are ...

BOSTON (Reuters) - Quest Diagnostics Inc said on Thursday that it had provided possibly erroneous results to thousands of people who had their vitamin D levels tested over the past two years. Quest, ...