Vitamin D Test

Fatigue. Low Mood. Aches. The Silent Signs of Vitamin D Deficiency.

Author: Tharb Faisl

Do you feel constantly tired, achy, or under the weather — even when you’ve had enough sleep?

You could be low in vitamin D, a crucial nutrient for energy, bone health, and immunity. At Marylebone Diagnostic Centre, we offer a fast, affordable private vitamin D blood test in London, with same-day appointments and results in 24–48 hours.

🔗 Book Your Vitamin D Test Online

What Is a Vitamin D Test?

A vitamin D blood test measures your level of 25-hydroxyvitamin D (25-OH D) — the most accurate marker of vitamin D status in the body.

It’s a simple blood draw that takes less than 10 minutes.

Why Should You Get a Private Vitamin D Blood Test?

Low vitamin D levels can impact your:

  • Energy levels and overall vitality
  • Mood, mental wellbeing & focus
  • Muscle and bone strength
  • Immunity — especially during flu season
  • Pregnancy, fertility, and hormonal balance

Learn more from the NHS guide to Vitamin D

Are You at Risk of Deficiency?

You may be more likely to need a private vitamin D blood test if you:

  • Spend most of your time indoors or wear sunscreen constantly
  • Have darker skin, which lowers natural vitamin D production
  • Follow a vegan or vegetarian diet
  • Are pregnant, breastfeeding, or over 50
  • Experience chronic fatigue, muscle aches, or frequent infections

Symptoms of Vitamin D Deficiency

  • Tiredness or constant fatigue
  • Muscle weakness or leg cramps
  • Bone/joint pain or stiffness
  • Low mood, irritability or brain fog
  • Frequent colds or slow wound healing

In many cases, symptoms are subtle — or absent. That’s why a vitamin D test in London is a smart first step toward better health.

Read the British Nutrition Foundation’s guidelines

Why Choose Marylebone Diagnostic Centre?

Central London clinic near Paddington & Marylebone
Walk-in & same-day appointments
Fast results from UK-accredited labs (24–48 hrs)
✅ Friendly, professional care team
✅ Optional health bundles – thyroid, iron, immunity & more

Want a broader check? Combine your private vitamin D test with a full health screen in one visit.

🔗 See our Health Screening Bundles
🔗 Learn about our Immunity Panel

What Happens If You’re Deficient?

If your vitamin D levels are low, our team will support you with:

  • Supplement recommendations based on your blood levels
  • Lifestyle guidance (sun exposure, food sources)
  • A tailored re-testing plan
  • Referral to a GP or specialist, if necessary

For clinical management, we also follow the latest NICE vitamin D guidance.

Book Your Private Vitamin D Blood Test in London Today

A simple test could explain months of fatigue, aches, or low mood — and help you feel like yourself again.

📍 Book online at marylebonediagnosticcentre.com
📞 Or call us directly to speak with our friendly team 02077240540 / 07495970109

🔗 Need to check thyroid or iron levels too? Combine your Vitamin D test with a full fatigue profile

Don’t guess. Test. A 10-minute check can change everything.

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