Vitamin D: Checking for Deficiency
Learn what your 25-hydroxy vitamin D levels mean for bone and immune health.
For Informational Purposes Only
This content is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for any medical concerns.
Guide Overview & Important Ranges
The 25-hydroxy vitamin D test is the most accurate way to measure how much vitamin D is in your body.
Below 20 ng/mL
Deficient
20 to 29 ng/mL
Insufficent
30 to 100 ng/mL
Sufficient
Above 100 ng/mL
Toxic
Medical Deep Dive
The Importance of Vitamin D
It is essential for calcium absorption and maintaining strong bones.
Low levels are linked to fatigue, bone pain, and muscle weakness.
Many people are deficient due to lack of sun exposure, especially in winter.
Vitamins Check
Upload your results to see if you need supplements.
Scientific References
This information is based on established clinical guidelines from authoritative sources.
Medically Reviewed for Accuracy
This content is aligned with established clinical guidelines from authoritative medical institutions, including MedlinePlus, the CDC, and the NHS.
BodyWellness AI uses a structured clinical logic framework to present this information clearly and safely.