Nicotine crosses the placenta and enters breastmilk, which exposes the fetus and newborn to nicotine and other chemicals. In addition to the physical defects caused by tobacco, nicotine exposure increases the rate of behavioral and emotional disorders in infants. Early exposure to nicotine also increases the risk of addiction.
Weight loss
Some people use tobacco products because it helps them lose weight. The reasons why cigarettes and other tobacco products increase weight loss are by stimulating the metabolism and reducing appetite. These studies showed that duration of use had more of an effect than the dose used.
Physical activity improved weight loss, however, smokers tend to be less active than non-smokers. Additionally, obese smokers experienced less of this metabolism benefit. While studies have shown that long-term smokers do have lower BMIs than non-smokers, this does not outweigh the harmful effects of tobacco use.
Serious illnesses
Lastly, the worst outcomes of long-term tobacco use are serious illnesses and death. Both firsthand and secondhand smoke can increase the risk and exacerbate respiratory diseases. Due to the carcinogens in cigarettes, the overall risk of cancer is increased, especially mouth and throat, stomach, lung, and cervical cancer.
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