The Vitamin D (25-Hydroxyvitamin D) test measures the level of 25-hydroxyvitamin D in the blood, which is the primary circulating form of vitamin D and the best indicator of overall vitamin D status. This test evaluates vitamin D sufficiency to support bone health, immune function, muscle strength, and overall well-being. Vitamin D deficiency is common and can lead to issues like weakened bones, increased infection risk, fatigue, and mood disturbances, but it is often preventable or treatable when identified early through blood testing.
25-Hydroxyvitamin D (Total)
Venous blood sample drawn
Not required (can be done at any time)
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