Fatigue & Low Energy Blood Test

11 Biomarkers | Venous Blood Test | CE-marked | UKAS-accredited | Doctor-reviewed results with personalised interpretation.

A targeted blood test checking key markers linked to tiredness, low energy and fatigue, including thyroid function, iron status, vitamin B12, folate and vitamin D. Designed for people who feel constantly drained or run down, this profile gives clear, clinically reviewed insight into common nutritional and thyroid-related causes of low energy so you can better 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.

£149.00

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Choose your sample collection method: Book a venous draw at our Livingston clinic Book a venous draw at home with a nurse +£63 Self-arrange a professional sample collection Partner clinic visit + £35.00 Finger Prick

Ferritin
Iron
Total Iron Binding Capacity
Unsaturated Iron Binding Capacity
Transferrin Saturation

Thyroid Stimulating Hormone, TSH
Free Thyroxine, FT4
Free Triiodothyronine, FT3

Active Vitamin B12
Folate
Vitamin D

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

It is for adults who feel persistently tired despite adequate sleep. It covers the most common measurable causes of fatigue, including anaemia and iron stores, thyroid function, vitamin B12, folate and vitamin D, blood sugar control, and liver and kidney function.

This panel is broader. It looks beyond nutrition to include thyroid, blood sugar, and organ function. The Fatigue & Vitamin Deficiency panel concentrates specifically on nutritional causes and suits people who already suspect a deficiency.

Yes, where blood sugar markers are included. Please fast for 10 to 12 hours, drinking water only. An early morning appointment is usually easiest.

Please stop biotin containing supplements for 48 hours, as biotin interferes with thyroid testing. If you take iron or B12, mention it when booking, as recent supplementation raises those readings and can hide a deficiency.

Most results are available within 2 to 4 working days of the laboratory receiving your sample. You will receive a secure email when your report is ready in your online patient portal.