The 25-OH Vitamin D test measures the amount of vitamin D in your body. It can be used to check if you have enough vitamin D, which is important for healthy bones and muscles. It can also be used to monitor the effectiveness of any vitamin D, calcium, magnesium, or phosphorus supplements you may be taking. This test is especially important for people with diseases that interfere with fat absorption, such as cystic fibrosis or Crohn’s disease.

Key Purpose:

• Measure vitamin D levels in the body
• Assess overall vitamin D status
• Screen for potential deficiency or excess
• Evaluate bone and overall health

Role in the Body Critical Functions:

• Support calcium absorption
• Strengthen bones and teeth
• Boost immune system
• Regulate cell growth
• Support muscle function
• Reduce inflammation

Normal Ranges Vitamin D Levels:

• Deficient: < 20 ng/mL
• Insufficient: 21-29 ng/mL
• Sufficient: 30-50 ng/mL
• Optimal: 40-80 ng/mL

Test Limitations Potential Interference Factors:

• Seasonal variations
• Sun exposure differences
• Dietary variations
• Laboratory testing methods
• Individual metabolic differences

Low Results May Indicate Potential Conditions:

• Vitamin D deficiency
• Bone weakness
• Increased infection risk
• Muscle weakness
• Potential autoimmune issues

High Results May Suggest Potential Conditions:

• Excessive supplementation
• Potential kidney problems
• Rare vitamin D toxicity
• Possible hypercalcemia

Always require professional medical interpretation for accurate diagnosis.