Skip to content

Dietary restrictions for 24 hour urine collections

Download and print as a PDF


If your request form includes metadrenalines

Please avoid the following for the 24 hours of the collection:

  • Vigorous exercise.
  • Excess nicotine (smoking, nicotine patches, electronic cigarettes).
  • Coffee.
  • Large doses of vitamin C (a glass of orange juice is fine).
  • Curry leaves and chili pepper (capsaicin).

Medications can also affect the results. Please list any medications you are taking on the request form.

If your request form includes 5HIAA (5-hydroxy indoleacetic acid)

You must avoid eating some types of food from 48 hours before you start collecting urine, and throughout the collection period, because they can affect the results:

  • avoid eating avocados, bananas, kiwi fruit, pineapple, red plums, tomatoes, walnuts.
  • Do not drink alcohol.
  • Avoid taking cough mixture and/or paracetamol.

These substances can increase the amount of 5HIAA in your urine and cause a raised result.

This information is intended for patients receiving care in Brighton & Hove or Haywards Heath.

The information here is for guidance purposes only and is in no way intended to replace professional clinical advice by a qualified practitioner.

Publication Date: April 2022

Review Date: December 2022

Pin It on Pinterest

Share This