Study Links Quitting Smoking to Reduced Risk of Dementia

A study conducted by researchers at a university in China analyzed data from over 32,000 adults over a 25-year period, finding that individuals who quit smoking may have a lower risk of developing dementia compared to those who continue to smoke. The findings were published in the journal Neurology, indicating that during the study, 5,868 cases of dementia were documented. Participants who quit smoking had a significantly lower risk of dementia, similar to those who had never smoked. The risk of dementia continued to decline the longer individuals remained smoke-free, approaching that of never-smokers after about seven years. The study also noted that the strongest benefits were observed in individuals who did not gain significant weight after quitting. Lead researcher Hui Chen stated that the findings suggest quitting smoking may support long-term brain health. Zaid Fadul, a physician not involved in the research, emphasized that the study adds to the evidence that quitting smoking can protect brain health over the long term. He noted that smoking contributes to chronic inflammation and oxidative stress, which are associated with cognitive decline. While the study identified an association between quitting smoking and reduced dementia risk, it did not establish a direct causal relationship, and other health and lifestyle factors may have influenced the outcomes.