Certain foods such as avocados, walnuts, and licorice can affect lab test results.
Notes on verification
Confirmed by multiple independent medical institutions (URMC, University Hospitals), clinical databases (MedlinePlus), and peer-reviewed/clinical literature (ScienceDirect, Medscape) on distinct mechanisms: tryptophan-rich foods affecting 5-HIAA tests and licorice's glycyrrhizic acid lowering potassium.
Sources
- Lab Test Results Guide: What to Expect - WebMD (webmd.com)
- https://www.urmc.rochester.edu/encyclopedia/content?contenttypeid=167&contentid=catecholamines_urine (urmc.rochester.edu)
- https://www.uhhospitals.org/health-information/health-and-wellness-library/article/lab-tests-v1/potassium (uhhospitals.org)
- https://www.uhhospitals.org/health-information/health-and-wellness-library/article/lab-tests-v1/catecholamines-urine (uhhospitals.org)
- https://www.medlineplus.gov/lab-tests/how-to-prepare-for-a-lab-test/ (medlineplus.gov)
- https://www.sciencedirect.com/science/article/pii/S237606052030585X (sciencedirect.com)