Vitamin D

A simple blood test that checks your vitamin D stores to support bones, muscles, and overall wellbeing.

Last reviewedJune 16, 2026

Serum

sample type

~5 mL

blood needed

~7 days

results in app

Any time of day

best timing

INCLUDED WITH ANIVA

199 € / year

0.55 € a day

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100+ biomarkers. Cheaper than a comparable test at your doctor. Guaranteed, or we match the price.

German PKV insurance usually reimburses.

On this page

Why test Reference ranges What you'll learn What affects it How testing works Sources FAQ

In short

Vitamin D (measured as 25-hydroxyvitamin D) is the storage form of vitamin D and the best marker of your overall vitamin D status. Your skin makes it from sunlight, and you also get it from food and supplements.

It helps your gut absorb calcium and phosphate, which keeps bones and muscles strong, and it plays a role in immune function.

Vitamins & Minerals

Reviewed against DGKL reference practice.

Why test this?

Low vitamin D is very common in Germany and central Europe, especially in winter. It can weaken bones, contribute to muscle aches, and over time raises the risk of osteoporosis and fractures.

Very high levels are almost always caused by taking too much supplement and can push calcium too high. Testing tells you where you sit and whether supplementing makes sense.

What is a normal result?

Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.

Adult reference values as used by Aniva. Ranges are guidance and can vary by laboratory and method.

Group	Normal range	Optimal range
Adults	30 to 100 µg/L	40 to 60 µg/L

Your Aniva report reads your result against these values together with your age, sex and the rest of your panel.

Ranges are guidance and vary by lab and assay, aligned with DGKL practice. Always read your result against your own lab's reference interval.

What insights will this test give you?

Whether your vitamin D is deficient, insufficient, or sufficient
A clear basis for deciding on supplementation and dose
Context for bone health, muscle aches, or low mood in winter
A baseline to recheck after a few months of supplements

What can affect this result?

What can skew the result

Levels swing with season and sun exposure and are usually lowest in late winter. Recent high dose supplements raise the number. Some assays measure D2 and D3 differently, which can shift results between labs. No fasting needed.

Best interpreted with

Read alongside calcium, phosphate, and parathyroid hormone (PTH) when bone health or calcium balance is the question.

How is this tested?

Sample

Serum

Blood needed

~5 mL

Method

Immunoassay

Best timing

Any time of day

Sources. The evidence behind this

NIH Office of Dietary Supplements: Vitamin D, LOINC 1989-3 25-hydroxyvitamin D3, Mayo Clinic Laboratories: 25-hydroxyvitamin D, NIH MeSH: Vitamin D

Common questions

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? Results are usually ready in about 7 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.

Which Aniva panels include this marker?

Core

Your annual full-body baseline with more than 100 biomarkers, included in your Aniva membership.