Low vitamin D has been tied to joint pain driven by inflammation, brain fog, reduced immune function, and depression. A 2020 ...

The first thing you could do to find out if you’re vitamin D deficient is try an at-home blood test – they’re readily ...

At-home vitamin deficiency tests are available from online retailers, including LetsGetChecked, Everlywell, MyLab Box, and more. Popular test kits can measure a person’s vitamin D, B12, or iron levels ...

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 ...

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 ...

FITBOOK editor Sophie Brünke sent blood and hair samples to the lab. Photo: FITBOOK Whether you’re tired, lacking energy, or just curious about your vitamin status, you no longer need to visit a ...

Vitamin D tests certified by the U.S. Centers for Disease Control and Prevention (CDC) Clinical Standardization Programs (CSP) are well calibrated overall, according to a new study presented Sunday at ...

Though it’s rare, a severe vitamin D deficiency can lead to a disease called rickets, also known as osteomalacia. Typically, ...

Meeting your vitamin D needs with whole foods can be a challenge, especially if you are not a fan of salmon. Here are some ...

High doses of the vitamin biotin in a person's blood can cause errors in some medical lab tests, and these faulty test results have already been linked to one death, according to the U.S. Food and ...

So, what gives? Does it depend on the percentage of vitamin C included in the serum? And — why apples? According to Ron Robinson, cosmetic chemist and founder of BeautyStat, apples are particularly ...