Vitamin D Deficiency: Signs, Tests, and What to Do Next
Low vitamin D is common, especially with little sun exposure, but tiredness alone does not prove it — a test does.
Why it matters
Vitamin D helps the body absorb calcium and supports bone health. Low levels are linked with bone pain, muscle weakness and, in children, rickets — but many people with low levels feel fine.
How it is tested
A 25-hydroxy vitamin D blood test is the usual test. Do not start high-dose supplements on your own based on a single result; take the report to your doctor, who will decide the dose and whether to retest.
Everyday sources
Sunlight, fortified foods, fatty fish, eggs and dairy help, but they may not be enough for everyone. Your doctor can advise based on your level and health.
Disclaimer: This article is general health information only, not medical advice. Consult a doctor for personal health decisions, symptoms, or test results.
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