Smoking, and its harmful substances such as nicotine, can harm almost every part of the body, including the brain. It can also lead to other brain conditions, such as cancer, dementia, and stroke.

Some research links smoking to weight changes. However, it may not cause weight gain directly. Quitting smoking has shown links to minimal weight gain, for various reasons. Smoking is the most common ...

Smoking damages the digestive system, which can lead to chronic inflammation and stomach pain. Quitting smoking can provide relief for stomach pain as well as other health benefits. Smoking has ...