Normal Range for 25-Hydroxyvitamin D

The normal reference range for 25-hydroxyvitamin D is generally 8–30.5 ng/mL.

25-Hydroxyvitamin D is formed in the liver through hydroxylation of vitamin D. Both elevated and reduced levels can adversely affect health. The normal serum concentration of 25-hydroxyvitamin D ranges from 8 to 30.5 ng/mL. Measuring 25-hydroxyvitamin D reflects the body’s vitamin D storage status and aids in diagnosing conditions caused by vitamin D deficiency.

Low 25-hydroxyvitamin D levels may lead to rickets, osteomalacia, or osteoporosis. Elevated levels may indicate vitamin D toxicity—particularly in patients with hypercalcemia, who often exhibit increased 25-hydroxyvitamin D concentrations. It is recommended to maintain healthy dietary habits, consuming ample fruits, vegetables, and other foods rich in vitamins and protein to meet nutritional needs. Additionally, establish regular sleep patterns: avoid staying up late, ensure sufficient sleep duration, and prevent excessive physical or mental fatigue.

It is advisable to follow a light, balanced diet and avoid spicy or irritating foods—such as garlic, spicy hotpot, and mustard. Adequate rest is essential; overexertion should be avoided to safeguard overall health.