Vitamin D 25 Hydroxy: What It Detects, Normal Range

Overview

The Vitamin D 25 Hydroxy, Serum test measures the concentration of 25-Hydroxy Vitamin D [25(OH)D], the primary circulating form of Vitamin D and the most reliable indicator of the body's Vitamin D status. Vitamin D plays a crucial role in calcium and phosphorus absorption, maintaining strong bones and teeth, supporting muscle function, and promoting a healthy immune system. Vitamin D deficiency is common and may lead to weak bones, muscle weakness, fatigue, frequent infections, osteoporosis, osteomalacia, or rickets in children. This test is recommended for individuals with symptoms of deficiency, limited sun exposure, bone disorders, malabsorption conditions, or those at risk of osteoporosis.

What It Measures

Why Take This Test?

• To diagnose Vitamin D deficiency or insufficiency. To investigate bone pain
• muscle weakness
• or frequent fractures. To assess the risk of osteoporosis and osteomalacia. To monitor Vitamin D supplementation and treatment. To evaluate calcium metabolism and bone health. To support routine preventive health checkups.

How to Prepare

• 1No fasting is required. Inform your healthcare provider if you are taking Vitamin D supplements or calcium supplements. Continue medications unless otherwise advised by your doctor. Follow any additional instructions provided by your healthcare provider.

Description

Measures the level of 25-Hydroxy Vitamin D in the blood to assess Vitamin D status, bone health, and calcium metabolism.