Thyroid Function Check
Thyroid Function Check
3 Biomarkers | Venous or Capillary Blood Test | CE-marked | UKAS-accredited | Doctor-reviewed results with personalised interpretation.
A thyroid function check measuring TSH, FT4 and FT3. Designed for people investigating tiredness, weight changes, low mood, cold sensitivity or energy changes, 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).
Thyroid Function
Thyroid Function
- Free Thyroxine, FT4
- Free Triiodothyronine, FT3
- Thyroid Stimulating Hormone
How to prepare
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
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Why Your Thyroid Function Check Matters
Many health changes begin quietly, before symptoms become obvious. The Thyroid Function Check is designed for people investigating tiredness, weight changes, low mood, cold sensitivity or energy changes.
It helps you move from guessing to understanding by checking the markers most relevant to this area of health.