Do I need to post my test sample straight away?

The samples for each test have different rules on how fast you must post them.

Return your sample to the laboratory using the FREEPOST label within the right timeframe to ensure your sample is valid. If you'd rather send it by recorded delivery, use the right address for your test:

  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 - only post back on a Monday, Tuesday or Wednesday. 
    • 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