The human breast carcinogens are polycyclic aromatic hydrocarbons, N-nitrosamines and aromatic amines. Evidently these chemicals are present in the tobacco which is available in the market. Hence this tobacco smoke has elevated the chances of causing breast cancer. Researchers have come to the conclusion that persons smoking before menopause are more risky in developing breast cancer. From a recent study the scientists have figured out about 9,000 breast cancer cases in people with either active or passive smoking. The study was assessed during the year 1977 to 2007. The causes found for the development of breast cancer is actually long period of current or past smoking or smoking at a younger age. The research team has also focused on the study from a different angle. The parameters considered in this study were the age of initiation of smoking and the total duration of smoking. The results revealed that the persons who started smoking at an earlier age have smoked a high quantity and for a long duration, thus increasing the risk of breast cancer.
Breast cancer
From the work of a few geniuses in Harvard Medical School, a conclusion followed that the risk of breast cancer increased when it was done before menopause. The rate will considerably decline for people smoking after menopause. Not smoking in childhood may not be involved in increasing the breast cancer risk. Results also show that the children of chain smokers are also not affected by the breast cancer risk. Smoking causes an antiestrogenic effect. This effect of smoking in the case of post menopausal women lowers their estrogen levels. From all these we have come to conclusion that smoking at an earlier stage and before menopause has been the major reasons of the increased breast cancer in the nation.
