Vitamin D, 25-OH Vitamin D, 25(OH)D Blood Test

Your body converts vitamin D into a form called 25-hydroxyvitamin D (25(OH)D), also known as calcidiol. The 25(OH)D blood test is considered the most reliable way to assess vitamin D status. The level of 25-hydroxyvitamin D in the blood reflects the total amount of vitamin D obtained from sunlight, food, and supplements.

🔍 What levels are considered optimal?

• Levels between 30 and 50 ng/mL are generally considered sufficient for overall health.
• Levels below 12 ng/mL indicate vitamin D deficiency.

🔷 Vitamin D and overall health:

Vitamin D plays an important role in bone metabolism, immune function, and muscle health. Low levels may affect multiple systems in the body.

Common signs associated with low vitamin D levels may include:

• Fatigue
• Bone discomfort
• Joint and muscle pain
• Low energy levels
• Increased susceptibility to infections
• Changes in mood

Vitamin D deficiency may result from limited sun exposure, reduced synthesis in the skin, insufficient dietary intake, or underlying health conditions. These may include gastrointestinal disorders affecting absorption, as well as liver and kidney diseases involved in vitamin D metabolism.