How do I return test samples from outside of the UK?

If you're returning test samples from outside of the UK, you'll need to send them to the lab's address.

As you are based outside of the UK, the sample return directions will be different than stated in the instructions, and you won't be able to use the Freepost address.

You'll need to arrange the right fee from the postal service in your country and return the sample to the laboratory within the right timeframe to ensure your sample is valid.

  1. Gut Health Test:
    The Doctors Laboratory, Halo Building, 1 Mabledon Place, London, WC1H 9AXd
  2. SIBO Breath Test:
    Biolab, The Stone House, 9 Weymouth St, Marylebone, London, W1W 6DB
  3. Leaky Gut (Intestinal Permeability) Test:
    Biolab Ltd, The Stone House, 9 Weymouth Street, London, W1W 6DB
  4. Adrenal Stress Test (Cortisol/DHEA):
    Cambridge Nutritional Sciences, Eden Research Park, Henry Crabb Road, Littleport, Cambridgeshire, CB6 1SE
  5. Food sensitivity (IgG) Test:
    Cambridge Nutritional Sciences, Eden Research Park, Henry Crabb Road, Littleport, Cambridgeshire, CB6 1SE

    Send in the right timeframe

    Make sure you return your samples within the right timeframe for your test:

    • Gut Health Test: within 12 hours 
    • SIBO Breath Test: within 10 days
    • Leaky Gut (Intestinal Permeability) Test: within 72 hours
    • Adrenal Stress Test (Cortisol/DHEA): within 24 hours
    • Food sensitivity (IgG) Test: within 24 hours

    Download our test instructions