Thanks to public messaging, we are all aware of the negative health consequences of smoking. Cigarette smoke contains a number of poisons and toxins such as carbon monoxide, cadium, arsenic, cyanide, benzene, ammonia, formaldehyde and many more. Even nicotine is a poison, used to kill insects. Of coursem it is always advisable to quit smoking. However, there are many ways to become healthier before quitting, that will also make it easier to give up the habit later.