A Simple Smell Test to Help Detect Parkinson’s Early

The Hospital Clínic Barcelona-IDIBAPS is leading a new initiative in Spain called Smell Test Direct (ST Direct), developed by the Michael J. Fox Foundation. The goal? To identify early signs of Parkinson’s disease—before motor symptoms like tremor or walking difficulties appear. 🔍 Why Smell Matters in Parkinson’s Loss of smell is one of the earliest known indicators of Parkinson’s disease. It can show up up to ten years before other symptoms. The ST Direct program uses this insight by offering a free, non-invasive smell test for people over 40. This test can be done at home and may help identify people at risk long before diagnosis is typically possible. 🧬 A Global Effort: The PPMI Study ST Direct is part of the Parkinson’s Progression Markers Initiative (PPMI)—a large international research study aiming to discover biological markers that help track or even predict Parkinson’s progression. Barcelona’s Clínic-IDIBAPS has played a key role in this global effort since 2013, contributing more than 100 volunteers to a cohort of over 3,500 participants. Thanks to this collaboration, researchers are gaining deeper insight into the causes and course of the disease, and working toward more effective diagnostic and treatment tools. 👥 Public Participation Encouraged Anyone aged 40 or older can take part in the ST Direct project by answering a brief survey and receiving the smell test by mail. Those who show a significant reduction in their sense of smell may be invited for further research assessments. As Dr. Alícia Garrido explains, “The test is free, easy to do at home, and can make a real difference to Parkinson’s research.” 🧠 Parkinson’s Disease: More Than Motor Symptoms Parkinson’s is the second most common neurodegenerative disease after Alzheimer’s. It affects movement, but also causes non-motor symptoms like changes in mood, sleep, and smell. Its onset is slow, its progression varies, and its diagnosis can be complex. Currently, treatments focus on managing symptoms—there is no cure or therapy that can stop or slow the disease’s progression. By the time clear motor symptoms appear, a significant number of dopamine-producing brain cells have already been lost. 🌍 A Call to Action Raising awareness and supporting early detection are vital steps toward better outcomes for people living with Parkinson’s and those at risk. Projects like ST Direct give the public a meaningful way to contribute to research—and to hope. Learn more, take the survey, and get involved: helping scientists better understand this disease starts with one simple smell test.