
Quitting Smoking Could Cut Dementia Risk by 16%, But Weight Gain Might Undermine the Benefit
A 32,000-plus US study of dementia-free adults followed for 25 years found that quitting smoking in later life is linked to a 16% lower dementia risk and slower cognitive decline, with the benefit strongest when weight gain after quitting is minimal. Gaining more than 10 kg tended to negate the dementia risk reduction, suggesting weight management should accompany smoking cessation to maximize brain health.













