Medically reviewed by Aviv Joshua, MS Vitamin D levels can be measured with a blood test. This test can indicate whether you have adequate levels, are at risk of a vitamin D deficiency, or have ...

Vitamin D and cholesterol share a complex relationship. While vitamin D may help lower cholesterol levels, some studies suggest vitamin D can actually raise them.

Vitamin D affects how your immune system works, and plays a role in controlling certain types of inflammation, including the type that leads to autoimmune diseases. It’s common for people with lupus ...

Dear Dr. Roach: I had lab work done recently and received a panic call from the doctor’s office that my vitamin D level was 29 ng/mL. I needed to start 50,000 IU once a week for 12 weeks ...

If the vitamin D level is too low, Wright said people may feel really tired and have no energy. On the other end, people can get too much vitamin D, which is called vitamin D toxicity.

There’s really no need for most people to supplement with more than 600 to 800 IU per day, but if you are deficient and having a hard time getting your vitamin D level up to a normal range, it ...

Vitamin D status was decided based on the serum levels of 25-hydroxyvitamin D, with deficiency defined as 25-hydroxyvitamin D levels below 30 nmol per liter, while concentrations between 30 and 50 ...

Galus, L., et al. (2023) Vitamin D supplementation increases objective response rate and prolongs progression-free time in patients with advanced melanoma undergoing anti-PD1 therapy. Cancer. doi ...