Measures Vitamin D levels in the body.
Vitamin D helps regulate many areas of the body and can be found in various foods, supplements and sunlight. Low levels of Vitamin D can cause fatigue and have been linked to contributing to various cardiovascular issues such as heart attack and stroke. Low levels may also indicate kidney issues or an absorption issue in the intestines. High levels of Vitamin D may indicate lymphomas. Or excessive supplementation.
Recommended with Vitamin D, 25-Hydroxy
Is Fasting Required? No
More Information: http://www.questdiagnostics.com/testcenter/TestDetail.action?ntc=17306