LONDON – New research shows it is possible to diagnose Parkinson’s disease by mass spectrometry analysis of sebum samples taken with a simple skin swab, and that the same technique has potential to be used for diagnosing COVID-19. In a paper published in Nature Communications on March 11, 2021, scientists and clinicians in the U.K. and the Netherlands describe using high resolution mass spectrometry to profile the chemical signature of lipids and other biomarkers in sebum from Parkinson’s patients and show how these exhibit subtle but fundamental changes as the disease progresses.