The average life expectancy of women (80.5 years) is longer than that of men (74.7 years), which is related to, among other things, women’s estrogen levels and lifestyle habits. However, the fact that women live longer than men as a whole does not mean that every woman lives longer than men, and this varies from person to person. Estrogen is one of the major advantages of women’s longer life expectancy than men’s. Estrogen has the ability to regulate cholesterol levels in the human body, lowering the level of LDL-c (which can increase the incidence of cardiovascular and cerebral vascular diseases) and raising the level of HDL-C (which can reduce the incidence of cardiovascular and cerebral vascular diseases). The presence of testosterone in men, which acts in the opposite way to estrogen, means that the risk of cardiovascular disease is greater in men than in women, which is related to the overall shorter life expectancy of women. On the other hand, men have relatively more bad habits, such as smoking and alcohol abuse, which are more likely to lead to respiratory diseases and various chronic diseases, which can also have an impact on life expectancy.