Dangers of Nicotine
The dangers of nicotine are far-reaching and can have extremely detrimental effects on long-term health.
Chewing tobacco, cigarettes and cigars all contain nicotine, which gives an almost immediate "buzz" to the user, stimulating the central nervous system but ultimately leading to a fatigue-induced crash that causes the person to want more, often resulting in addiction.
Nicotine stays in the body
Unlike some other toxic substances, such as alcohol, nicotine levels accumulate in the body during the day and stay there until the substance is no longer used. This means that nicotine is harming the body 24/7, even during periods when the person is not actively smoking or chewing. Because withdrawal symptoms are often uncomfortable, continuing to keep nicotine in the body is the root of addiction.
Female nicotine users pose a significant threat to their unborn babies. Smokers have an increased risk of having stillborn and premature babies or children with birth defects. Some research has also found evidence that male smokers can alter the health of their sperm, resulting in an increased risk of birth defects for their future children.
The tar content in cigarettes can contribute to a variety of lung problems, like lung cancer, throat cancer, emphysema and bronchial disorders. Long-term, heavy smokers may even eventually need the assistance of an oxygen tank to help them breathe properly.
Heart disease is one of the leading killers in the U.S., and smoking increases the risk exponentially. Not only are smokers at risk for cardiovascular-related problems, but second-hand smoke can put others in danger too. Children exposed to smokers have an increased risk for respiratory illnesses or sudden infant death syndrome.
Source: Web MD