This is a bad news for those who smoke. If you want to keep your skin looking healthy, you must quit this filthy habit. In recent studies, it was found that the contents in tobacco are known to be hazardous for our skin. It causes harmful effects in the blood vessels which lead to a lower blood flow. As blood vessels carry oxygen and nutrients to the skin to help you look healthy, by smoking you’re making it harder to carry oxygen and nutrients to the surface.