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Fatigue & Vitamin Deficiency Blood Test
12 Biomarkers | Venous Blood Test | CE-marked | UKAS-accredited | Doctor-reviewed results with personalised interpretation.
A wider nutritional panel covering vitamins, inflammation, ferritin, cholesterol and magnesium. Designed for people wanting a broader nutrition and wellbeing view, 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).
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Minerals
- Magnesium
Cholesterol & Heart Risk
- Cholesterol
- HDL Cholesterol
- HDL % of Total
- LDL Cholesterol
- Non-HDL Cholesterol
- Triglycerides
Iron Status
- Ferritin
Inflammation
- C-reactive Protein, High Sensitivity
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 for adults whose tiredness may stem from nutritional causes. It focuses on iron stores and a full blood count, vitamin B12, folate and vitamin D, which together account for a large share of nutrition-related fatigue.
How does this differ from the Fatigue & Low Energy panel?
This one concentrates on nutritional causes. The Fatigue & Low Energy panel is wider, adding thyroid, blood sugar and organ function. Choose this if you suspect a deficiency, and the broader panel if the cause is entirely unclear.
Should I stop my supplements before testing?
Where possible, pause oral B12 and iron supplements for two weeks beforehand, as recent supplementation raises measured levels and can hide a deficiency you are only partially correcting. Do not stop anything prescribed for a diagnosed condition without medical advice.
Do I need to fast?
Fasting is not required for this panel. If you take iron supplements, a morning sample before your daily dose gives the most representative reading.
Can vegetarians and vegans benefit from this test?
Yes, particularly for B12 and iron. Vitamin B12 occurs naturally almost entirely in animal foods, and plant-based iron is absorbed less efficiently, so deficiency is more common on these diets even when eating well.
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