Using this method has produced “largest memory improvement ever observed”according to one expert. As we age, change is inevitable: wrinkles, gray hair and physical changes are part of the process.
However, it is not just the aesthetic transformations that are of concern. According to a study by Global Brain Health Institute, international initiative dedicated to brain health and reducing the global impact of dementia, over half of people fear losing their memory. A possible answer to this fear could lie in an often underestimated sense: the sense of smell . The neuroscientist Michael Leon , former professor at the University of California in Irvine, he has dedicated his career to the study of how chemical substances influence perception, coming to focus on the olfactory system, the sensory network responsible for smell. His research indicates that the targeted range of smell can significantly enhance memory, opening up perspectives ranging from academic learning to the prevention of neurodegenerative diseases such as Alzheimer’s and dementia. The direct link between smell and memory is due to an anatomical peculiarity: the olfactory system is directly connected to the hippocampus, the center of memory, unlike other sensory systems which have been reorganized during evolution.
This allows odors to quickly access deep brain structures. An example cited by Leon is that of sommeliers, who through years of olfactory training develop a particularly efficient memory. A 2016 study published in Frontiers in Human Neuroscience found that in their brain areas related to memory the cortex was thicker than average, suggesting a possible greater resistance to neurodegeneration. To evaluate the effectiveness of olfactory functionality in the elderly, Leon conducted a study on 43 people between 60 and 85 years old. For six months, half of the participants used nighttime diffusers with essential oils, while the other half received a placebo treatment. Tests showed that the group exposed to the odors recorded an improvement in memory 226 percent compared to the control group, a result defined as unprecedented. Subsequent studies have also highlighted a correlation between loss of smell and numerous neurodegenerative diseases. The data is also relevant in light of the long-term consequences of COVID-19, which has caused persistent olfactory deficits in some patients. According to Leon, regular exposure to different odors could not only support brain health, but also contribute to the recovery of olfactory function, through daily activities capable of naturally stimulating this sensory system.
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