Quitting Smoking Linked to Lower Dementia Risk
A recent study suggests that individuals who quit smoking may have a reduced risk of developing dementia later in life. Conducted by researchers from a Chinese university, the analysis involved over 32,000 adults over a span of 25 years. They found that former smokers had a significantly lower risk of dementia compared to those who continued smoking.
The findings were published in the journal Neurology. During the research period, there were 5,868 recorded cases of dementia. Notably, participants who stopped smoking during the study demonstrated a risk level comparable to those who had either quit beforehand or never smoked at all.
As the duration since quitting increased, the dementia risk continued to decline, eventually nearing that of non-smokers after approximately seven years. This reduction was particularly marked among individuals who didn’t gain much weight after quitting.
Hui Chen, the lead researcher, stated that while smoking cessation appears to support long-term brain health, what happens after quitting is also crucial.
Zaid Fadl, a Harvard-trained internist who was not part of the study, remarked that these findings further support the view that quitting smoking can have long-term benefits for brain health. He elaborated that smoking is linked to chronic inflammation, oxidative stress, and damage to blood vessels that supply the brain, all of which contribute to cognitive decline and an increased risk of dementia.
Fadl emphasized that it’s never too late to quit, reinforcing that even smokers who think it’s too late should consider stopping. “Quitting smoking early leads to the most health benefits,” he mentioned, noting that healing begins soon after cessation.
Though the study reveals promising insights, it also has limitations. While a link between smoking cessation and lower dementia risk was identified, the study wasn’t structured to confirm that quitting smoking directly prevents dementia. Various health, lifestyle, and environmental factors could also have affected the outcomes for participants.
