UKAS LAB · RESULTS IN 24H · HARLEY STREET

Vitamin D Blood Test

Vitamin D deficiency is extremely common in the UK, especially during winter months. Our test identifies whether your levels are optimal, insufficient, or deficient.

Care Quality Commission registered
Est. 1984 · UKAS Accredited LabsConsultant-grade Specialists
General Medical Council registered doctors

The Sunshine Vitamin

Vitamin D is essential for bone health, immune function, and muscle strength. With limited sunlight in the UK, many people have suboptimal levels. Symptoms of deficiency include fatigue, bone pain, muscle weakness, and low mood.

Understanding Your Results

  • Below 25 nmol/L: Deficient - supplementation recommended
  • 25-50 nmol/L: Insufficient - may benefit from supplementation
  • 50-125 nmol/L: Adequate - healthy range
  • Above 125 nmol/L: High - discuss with your doctor
Full catalogue

Find another blood test

Search over 1,000 markers and panels. Type to filter, or browse by category — same-day appointments on Harley Street.

Dr Penelope Sheehan
Clinical Lead & Reviewer

Dr Penelope Sheehan

Health Screening, Paediatrics and Menopause • GMC 6056535

This page was medically reviewed on 2 July 2026.

"Specialising in women's health, hormonal balance, and menopause management within screening contexts. Dr Sheehan also has dedicated weight-loss management training and experience in safe GLP1 agonist prescribing alongside a special interest in paediatric assessments and consultations. Her compassionate and understanding approach is particularly valued by our patients."

View Clinical Profile
Transparent pricing

Treatment menu & fees

Vitamin D Test

£55
25-OH Vitamin D
Same-day results
Supplement advice
WhatsApp