A Verywell Health editor shares her experience with vitamin D deficiency and the impact that vitamin D supplements had on her ...

Vitamin D supplements are generally in your system after 4 to 12 weeks. Learn more about the importance of consistent supplementation to sustain results.

Vitamin D levels can be measured with a blood test. This test can indicate whether you have adequate levels, are at risk of a ...

Testing vitamin D levels in the blood is not prohibited, but including it in routine blood tests is not medically justified, the Health Insurance Fund says.