A simple blood test that checks your vitamin D stores to support bones, muscles, and overall wellbeing.
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Test 100+ biomarkers
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Clinicians order vitamin D to check overall status, especially for bone health, muscle function, or fatigue. It helps guide supplement needs, monitor treatment, and assess risk in people with little sun exposure, darker skin, aging, pregnancy, or gut and kidney conditions. It is also checked when calcium or parathyroid hormone levels are off. You can test this marker with Aniva across Germany and Finland.
Clinicians order vitamin D to check overall status, especially for bone health, muscle function, or fatigue. It helps guide supplement needs, monitor treatment, and assess risk in people with little sun exposure, darker skin, aging, pregnancy, or gut and kidney conditions. It is also checked when calcium or parathyroid hormone levels are off. You can test this marker with Aniva across Germany and Finland.
High: Often due to too much supplementation and may be linked with high calcium. Review your dose, pause megadoses, and discuss a plan with your clinician.
Low: Common, and may reflect limited sun, low intake, higher needs, or absorption issues. Consider diet, safe sun exposure, or supplements, and recheck after some weeks. Cutoffs vary by lab and guideline—focus on trends and your overall context.
Common factors that can affect results include recent high-dose vitamin D supplements, seasonal sunlight changes, sunscreen use, skin tone, higher body weight, aging, pregnancy, and certain medicines (anticonvulsants, glucocorticoids, rifampin, orlistat, cholestyramine, antiretrovirals). Large doses of biotin can interfere with some immunoassays; avoid for 48 hours before testing. Acute illness or inflammation may also shift levels.
Special situations include chronic kidney disease, parathyroid disorders, pregnancy, and malabsorption—confirm or adjust with repeat testing, calcium/PTH, or a 1,25-dihydroxyvitamin D test when advised.
What does my vitamin D result mean? It reflects your body’s vitamin D stores. Low levels suggest you may need more intake, sun, or a supplement plan.
Do I need to fast for this test? No. You can eat and drink normally unless your clinician gives other instructions.
What can affect my result? Recent supplements, sun exposure, season, skin tone, age, pregnancy, and some medicines can change levels. High-dose biotin may skew some tests.
How often should I test? If starting or changing supplements, or at higher risk, consider retesting after a few months or as advised by your clinician.
How long do results take? Most labs report results within 1-3 working days.
What should I discuss with my clinician? Your symptoms, diet, sun habits, and medications, plus whether to adjust supplements and recheck calcium or PTH.
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