There is definitely some truth that baldness is caused by hereditary factors, but this is not always the case. Being overweight or obese can also cause one to lose hair, particularly for women.
It has been known for quite some time that hair loss is caused by hormonal problems. For men, hormonal problems (particularly with testosterone) can lead to balding. However constant stress or excess fat can also wreak havoc hormonally and have the same effect.
Every hormone present in the body plays a specific role. The relationship between a cell and the body’s hormones could be compared to an organization in that the cells of the body would be the “employees” and the hormones would be the “managers”. In other words, hormones instruct the cells on what to do.
For example, the male hormone testosterone will instruct cells to be masculine, while the female hormone estrogen will instruct cells to be feminine. Should a man be injected with estrogen, the cells would begin to act in a feminine manner and start developing breasts. Basically, hormones instruct the cells on how to behave and can even change the structure or function of the body.
When the body is full of excess fat, the hormonal system will start to decay. The various hormones produced by the body will start to interfere with one another. It would be like a manager from one department giving orders to a department he or she wasn’t in charge of. It can also create a situation where there are “too many chiefs and too little Indians” – in other words, the “managers” begin to outnumber the “employees”. In short, hormonal chaos is created.
Another fact that was discovered was that fat itself produces the female hormone estrogen. So, the more excess fat someone has in his or her body, the more estrogen he or she will have. Estrogen, in particular, will interfere with the hormones produced by the thyroid gland. As a result, the thyroid’s function will be reduced, which can lead to hair loss, for both men and women.
Frank Suárez– Obesity and Metabolism Specialist