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The toxins present in cigarettes, such as nicotine, tar, and carbon monoxide, can interfere with the body's natural ability to eliminate harmful substances

Overall, e-cigarette users showed no statistically significant increase in stroke risk (OR 1.05, 95% CI 0.911.19), and smoking-adjusted analyses were similarly non-significant

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Associations between smoking status and cortical thickness Controlling for gender and exact age at scanning (Model 1) showed that current smokers had a generally thinner cortex than those who had never smoked (Figure 2a)