So everyone knows that testosterone is a hormone that is specific to males, but there are several facts about this hormone that many people are not aware of. If you are interested in learning more about your health, or the health of a loved one, find out more about the sources of testosterone and the effects the hormone has on the body. Here is some basic information to get you started. Testosterone is primarily secreted from the testes (in males) or the ovaries (in females). It is a steroid hormone that is naturally produced in the body, which means it can cause muscle growth and expansion and is derived from cholesterol; the hormone also fuels other changes in the body, such as hair growth and the changing of the voice. Small amounts of testosterone can also be found in the adrenal glands, which are small glands right above the kidneys. Testosterone is found in large quantities in men, beginning mainly when male children begin puberty. However, women have testosterone as well in smaller amounts, and the hormone is necessary for female growth as well. Testosterone is produced naturally in both males and females throughout life, but the amounts of the hormone vary depending on age, sex, and physical condition. Testosterone has also been used to treat women who are recovering from breast cancer, and need to re-strengthen bones and tissue. If you think testosterone supplements may be right for you, or if you want to learn more about how to increase testosterone levels naturally, firstly speak to your physician for more details and read more background information here.