Low mood, low energy, aches that don’t add up—Vitamin D can be part of the picture. Our Mood Test measures your 25-OH Vitamin D level at home and gives you a simple plan. No clinics. No faff.
Why this matters
UK sunlight is unreliable, especially October to March. Many people run low without realising. Testing gives you a reliable number, a target to aim for, and a way to track progress. Guessing your dose can mean taking too little to feel better or too much for your body.
What this test actually measures
You get a lab-grade measurement of 25-hydroxyvitamin D (25-OH) in nmol/L—the best indicator of Vitamin D status. It reflects both:
- D3 (cholecalciferol) from sun and supplements
- D2 (ergocalciferol) from some foods and supplements
Analysis is fulfilled via our partner network Medichecks, with clear ranges and actions in your report.
Who should test
- You spend most days indoors or use SPF daily
- You have darker skin and live in the UK
- You’re feeling tired, low in mood, or have muscle aches
- You’re plant-based, low-dairy, or avoid oily fish
- You’re starting or changing a Vitamin D supplement and want to check the dose
- You want a winter baseline and a late-summer check-in
When to test (and retest)
- Best baseline: late autumn or winter
- On supplements: retest 8–12 weeks after changing your dose
- Seasonal check: once in late winter and once in late summer shows your personal swing
Reference ranges (nmol/L) and what to do
- Low (deficient): < 25 — Likely to notice symptoms. Follow dosing advice in your report and retest in 8–12 weeks.
- Insufficient: 25–50 — Common in UK winters. Consider a daily supplement and retest in 8–12 weeks.
- Sufficient: 50–125 — Good range. Maintain your routine; retest in 6–12 months or across seasons.
- High: > 125 — Review your dose. Very high levels can be risky—follow your report’s guidance.
We report in nmol/L. If you track in ng/mL, multiply ng/mL by 2.5 to get nmol/L.
How it works
- Order in minutes — Add to basket, check out, and we ship your kit fast.
- Collect at home — A small finger-prick sample takes a few minutes.
- Post it back — Use the prepaid, tracked return in the box.
- Get your results online — Clear ranges, actions, and next steps in your dashboard.
Price and what’s included
£55 for a complete at-home Vitamin D test:
- At-home finger-prick kit (lancets, tube, instructions)
- Prepaid tracked return
- Laboratory analysis of 25-OH Vitamin D via our partner network (Medichecks)
- Clear report with your number, range, and practical guidance
- Secure results dashboard built for mobile
No subscription required.
Built for Gen Z and busy brains
- Mobile-first: instant range check and next steps at the top
- Actionable: suggested dose bands and simple retest timelines
- Private: results in your secure dashboard
- Flexible: test once, or set a reminder to retest after a dose change
Supplements and testing: pause or carry on?
You don’t need to stop Vitamin D before testing. If you’ve just started or changed your dose, wait 8–12 weeks before your test to get a stable reading. If you use very high-dose bolus supplements, aim to test mid-way between doses.
Mini proof point
A typical pattern: test in February at 34 nmol/L (insufficient), take a consistent daily supplement, retest 10 weeks later at 76 nmol/L. Energy improves, then a smaller maintenance dose holds through summer.
Common questions
Is a finger-prick accurate enough?
Yes. 25-OH Vitamin D from a capillary sample is suitable for assessing Vitamin D status when processed by a clinical laboratory. Follow the instructions closely for a good sample.
How soon are results ready?
Once your sample reaches the lab and is analysed, you’ll get an email. Most people see results shortly after the lab receives the sample.
What if my result is very low?
Your report flags this clearly with safe next steps and when to retest. If your number is very low or you have worrying symptoms, speak to a clinician.
Can I take the test if I’m pregnant or breastfeeding?
Yes. Many people test to guide safe supplementation. Always follow clinician advice for dosing in pregnancy.
Is this for under 18s?
No. This test is for adults 18+.
Can I combine this with other tests?
Yes. Many customers pair Vitamin D with Iron/Ferritin and Vitamin B12 for a fuller picture of energy-related markers.
How to start
Order the Mood Test (Vitamin D Blood Test, 25-OH) for £55. Collect at home in minutes. Get a clear number and a simple plan for your next step.
Start with this checklist and order for £55
