What can determine the degree of hairiness of the outer integuments of the body in different people?

This is primarily determined genetically. A person can start to go bald even at a fairly young age due to genetics. But this happens mostly with men. This is the second reason – a person’s gender. Women have much less hair than men. All because of the action of sex hormones. Also, the environment affects the hair. But mainly this effect acts on open skin areas. Some medications can affect the scalp. For example, drugs for chemotherapy.