Vitamin D 1 health indicators in store

The Vitamin D Test is a single-marker blood test measuring 25-hydroxyvitamin D (25-OH), the storage form of vitamin D, available from Ways Pharmacy (UK).

Key facts

Who it is for

• Adults in the UK checking their vitamin D status at the end of winter, when vitamin D levels tend to be lowest
• People with fatigue, bone or muscle aches, or low mood who want to rule out vitamin D deficiency
• People with limited sun exposure, darker skin, or who cover most of their skin outdoors
• People taking a vitamin D supplement who want to confirm their level is in range

Not suitable for: acutely unwell people who need urgent medical assessment; use as a substitute for diagnostic assessment by a doctor.

What is measured

• Vitamin D (25-OH) — 25-hydroxyvitamin D, the marker used to assess whether your vitamin D stores are deficient, insufficient, or adequate. Vitamin D helps regulate calcium and phosphate, which keep bones, teeth and muscles healthy.

How it works

1. Complete payment online and book your appointment at Holborn London.
2. For in-store, attend Ways Pharmacy, 77 Southampton Row, London WC1B 4ET, where a trained phlebotomist takes a blood sample.
3. Your sample is sent for analysis.
4. You receive a written report with your result against the reference range, typically within 3–5 working days of the lab receiving your sample.
5. A pharmacist can talk you through the result and, where appropriate, recommend GP follow-up.

Frequently asked questions

Do I need to fast before a vitamin D test?

No. Vitamin D is not affected by food, so you can eat and drink as normal before your sample. Take your regular medications as usual unless your GP has advised otherwise.

How long do results take?

Results are typically returned 3 to 5 working days after your sample is received. You will receive a written report showing your level against the reference range.

What if my vitamin D is low?

A low result does not diagnose a condition on its own. The pharmacist will explain what your level means, discuss whether supplementation may be appropriate, and recommend GP follow-up if needed. Reference ranges are provided with your report.

Can I do this test at home or by post?

No. This test is available in store only: attend our Holborn pharmacy, where a trained phlebotomist takes your sample.

When to seek further advice

This test does not diagnose a condition. Reference ranges are provided with your report; discuss your results with a clinician, and if a result is abnormal, follow it up with your GP. Seek prompt medical advice if you feel acutely unwell.

This is a private health screening service. Results are interpretive and do not replace clinical diagnosis by a GP or specialist. Abnormal results should be followed up with your GP.