Cigarette smoke causes immediate damage to person's lungs and their DNA even from second-hand smoke.
The chemicals in cigarette smoke reach your lungs quickly every time you inhale causing damage immediately.
Inhaling even small amount of tobacco smoke will damage your DNA, which can lead to cancer.
Cigarette manufacturers and tobacco companies deliberately design cigarettes to be addictive and in the process use stuff which impacts our lungs and DNA.
Tobacco smoke can contain more than 7000 chemicals and compounds, including hundreds that are toxic and at least 70 that can cause cancer.
This clearly means there is no risk free level of exposure to cigarette smoke.
The lining of the lungs becomes inflamed as soon as it is exposed to smoke, and over time the smoke can cause chronic lung diseases such as emphysema and chronic bronchitis.
Even a whiff of smoke can adversely impact body.
Besides, the components of tobacco smoke also induce oxidative DNA damage.
This oxidative DNA damage is related to an increased risk of developing several degenerative chronic diseases which includes coronary heart disease and the dysfunctional cells (cancer).
These health hazards are not confined to active smokers but second-hand smoker have the same risks as active ones.
Reactive oxygen species is one of the environmental chemicals that is toxic to our body.
During passive smoking, the body is attacked by an excess of free radicals which inducing oxidative stress.
Therefore, even a short period of passive smoking will break down serum antioxidant defense of the nonsmoker.
It is more bad news for smokers as aftermath of smoking does not just restrict to dna damage.
Smoking also causes blood vessels to constrict which restricts the blood flow to the penis and many men may see no outward adverse affects until middle age when natural aging causes blood vessels to become smaller.
So being a smoker adds to the risk of becoming impotent for some people.
Smoking is proving to have long-term adverse effects on almost every system and part of the smoker's body.
Even if the man is not impotent there are other changes taking place that may be undetectable until too late.