Skip to product information
Iron, B12 & Vitamin D Blood Test
8 Biomarkers | Venous Blood Test | CE-marked | UKAS-accredited | Doctor-reviewed results with personalised interpretation.
A combined iron and vitamin profile checking active B12, folate, iron status and vitamin D. Designed for people investigating fatigue or common nutritional deficiencies, this test gives clear, clinically reviewed insight so you can understand your results and know what to do next.
Results are typically available within 2 working days from when your sample reaches the laboratory (excluding weekends and bank holidays).
£99.00
Sale price
£99.00
Regular price
Taxes included.
Shipping calculated at checkout.
Iron Status
- Ferritin
- Iron
- Total Iron Binding Capacity
- Transferrin Saturation
- Unsaturated Iron Binding Capacity
Vitamins & Nutritional Status
- Active Vitamin B12
- Folate
- Vitamin D
How to prepare
- Fasting required 8–12 h before the test (water only) recommended for glucose, cholesterol/triglyceride accuracy
- Sample timing: between 7:00 AM – 10:00 AM
- Stay hydrated; avoid strenuous exercise, heavy meals, and supplements (iron, B12, multivitamins, biotin) for 48 hours prior
- Continue prescribed medications unless otherwise directed
Frequently asked questions
Who is this test for?
It is a focused check of the three deficiencies most often found behind tiredness, low mood, hair thinning and poor concentration. It measures ferritin and iron status, vitamin B12 and vitamin D.
When is the best time to test?
A morning sample is preferable, taken before any iron supplement that day. Serum iron follows a daily rhythm and falls through the afternoon, so morning testing gives more consistent results.
Will recent supplements affect my results?
Yes. Iron supplements can raise serum iron within hours, and recent B12 supplementation or injections raise measured B12 substantially. Where possible, pause oral supplements for one to two weeks so the results reflect your true status.
Why is ferritin more useful than a standard iron test?
Ferritin reflects your iron stores rather than the amount circulating at that moment. Stores deplete first, so ferritin identifies iron deficiency at an earlier stage, often well before anaemia appears on a full blood count.
Is vitamin D deficiency common in the UK?
Yes, particularly between October and March, when UK sunlight is too weak for the skin to produce meaningful amounts. Public health guidance recommends considering a daily supplement through the winter months, and testing shows whether your level is genuinely sufficient.
News
How Does a Blood Test Work? A Complete Guide
Whether it's your first time or you just want to know what's actually happening to your sample once it leaves your hands — this guide walks you through the entire...
How Does a Blood Test Work? A Complete Guide
How Does a Blood Test Work? A Complete Guide
What Can a Blood Test Tell You About Your Health?
Discover what a private blood test can reveal about your health — from organ function and hormones to vitamins, inflammation, and diabetes risk. Explained by the Nuvivo Health clinical team.
What Can a Blood Test Tell You About Your Health?
What Can a Blood Test Tell You About Your Health?
Understanding Your Blood Test Results. We Explain Them.
Learn how to understand your blood test results with Nuvivo Health. We explain reference ranges, what can affect your results, and when to seek advice.
