Why Vitamin D Deficiency Is More Common Than You Think
The “Sunshine Vitamin” You Probably Aren’t Getting Enough Of. Vitamin D is essential for strong bones, mental wellbeing, hormonal balance, and a resilient immune system. But shockingly, 1 in 6 adults in the UK is thought to have a deficiency — and many don’t even know it.
At Marylebone Diagnostic Centre, our simple blood test gives you accurate, fast results — so you can take control of your health, especially during the grey months in London.
Book Your Vitamin D Deficiency Test in London Today!
What Does Vitamin D Do?
Vitamin D isn’t just a bone nutrient. It plays a powerful role in:
Calcium absorption – maintaining strong bones and teeth
Muscle function – reducing the risk of cramps and weakness
Mood regulation – low levels are linked to seasonal depression
Immune support – reducing inflammation and fighting infection
Hormonal balance – supporting reproductive and thyroid health
Are You at Risk of Deficiency?
You might be deficient in vitamin D if you:
- Spend most time indoors
- Wear sunscreen or cover up for cultural/religious reasons
- Have darker skin (melanin reduces vitamin D synthesis)
- Are pregnant or breastfeeding
- Follow a vegan or dairy-free diet
- Are over 50 years of age
Book Your Vitamin D Deficiency Test in London Today!
Common Symptoms Include:
| Symptom | Why It Happens |
| Fatigue | Reduced cellular energy and immune function |
| Muscle aches | Lack of calcium regulation in tissues |
| Bone pain | Weakening of bone mineral density |
| Low mood | Disrupted serotonin production |
| Hair thinning | Linked to autoimmune and hormonal effects |
Book Your Vitamin D Deficiency Test in London Today!
Our Private Vitamin D Blood Test
Quick, painless, and available same-day in Baker Street — our test measures your total vitamin D (25-hydroxy) levels.
- No fasting required
- Results in 1–2 working days
- Reviewed by our clinical team
- Can be repeated seasonally (especially after winter)
Want to go further? Add Vitamin B12, Folate, or Thyroid Function for a more complete picture of your nutritional health.
Book Your Vitamin D Deficiency Test in London Today!
Real Patient Insight
“I’d been struggling with low energy for months. One blood test showed my vitamin D was dangerously low. With supplements and sunlight, I bounced back quickly.”
— Ranya, 36, Paddington
“My GP brushed off my symptoms. Marylebone’s test gave me clarity — and within weeks, I felt like myself again.”
— Lewis, 51, Euston
FAQs – Vitamin D Testing in London
Book Your Vitamin D Deficiency Test in London Today!
Take the First Step Toward Better Health
Private, fast blood test in Central London
Near Harley Street, Baker Street, Mayfair, Kings Cross
Detailed results in 1–2 days
Optional add-ons for full nutritional insight
Friendly team, no GP referral needed
Book Your Vitamin D Test at Marylebone Diagnostic Centre