What Are the Effects of Smoking? It's a fact that smoking has a horrible effect on your health, and there are several things that you can do to combat these harmful effects. Some of the most important is to quit smoking, and you should definitely make this a goal if you want to enjoy a long and healthy life. However, there are several other adverse effects that you should also be aware of. Cancer: It is no secret that cigarette smoking is associated with several cancers, including lung, prostate, laryngeal, breast, and testicular cancers. However, the effects of smoking on cancer are not entirely understood. This article presents some more prominent clinical aspects of smoking after a cancer diagnosis. First, it is worth noting that cancer risk has increased over time. For example, smoking is now a contributing factor to up to 30% of cancer deaths worldwide. Smoking also reduces the effectiveness of treatment. For instance, in one study, patients who stopped smoking before cancer ...