Many believe the sense of smell is the strongest trigger of memories, but is one’s ability to correctly identify odors linked to the development of Alzheimer’s disease (AD)? Investigators from McGill University, Montreal, evaluated odor identification as an indicator of presymptomatic AD in cognitively normal older adults who are at increased risk. They measured participants’ ability to identify certain odors as well as their cognitive performance. Data showed reduced odor identification correlated with lower cognitive score and older age. The researchers believe that diminished odor identification may be a practical and affordable marker of preclinical AD pathology.