1228. Vitamin D (25-hydroxyvitamin D, 25-(OH)D)

25-hydroxyvitamin D (25(OH)D) is the primary indicator of vitamin D levels in the body. Vitamin D is essential for normal calcium absorption and the maintenance of healthy bones, muscles, and the immune system. This test helps assess the body's vitamin D status and identify any vitamin D deficiency or excess. Vitamin D testing is also used to monitor levels during treatment.

Why take a test for vitamin D? Research recommends people with an increased risk of deficiency, as well as those with conditions that affect its level in the body.

To whom the study is recommended:

• people over 60 years old - due to the increased risk of falls and fractures;
• pregnant and breastfeeding;
• persons with excess body weight (BMI ≥ 30 kg/m²) or dark skin pigmentation;
• persons taking long-term anticonvulsant, hormonal drugs, as well as drugs for the treatment of viral or fungal infections.

When it is appropriate to take the test:

• in case of insufficient exposure to the sun;
• with a sedentary lifestyle;
• with symptoms of insufficient level – weakness, pain in muscles and bones, frequent infections;
• in the presence of osteoporosis, diseases of the parathyroid glands (hyperparathyroidism), impaired calcium-phosphorus metabolism;
• in the case of chronic diseases of the kidneys, liver and autoimmune diseases;
• with absorption disorders – inflammatory bowel diseases, cystic fibrosis, after bariatric operations;
• in the presence of specific inflammatory diseases (tuberculosis, sarcoidosis), diabetes and oncological diseases;
• to monitor the effectiveness of vitamin D treatment.

• Venous blood

In order to exclude factors that may affect the test results, we recommend to follow the preparation rules: