Many people decide to use a testosterone supplement, especially people over the age of 30. A lot of people consider testosterone supplements controversial, too. According to recent studies conducted by researchers, testosterone supplements may help prevent Alzheimer's disease. In fact, supplementation may be useful for both men and women, as testosterone levels decline in elderly men and postmenopausal women.

Alzheimer's disease is characterized by plaques in the brain formed by the deposition of b-amyloid peptides. Researchers discovered that testosterone was found to decrease the secretion of b-amyloid peptides by 30-45 percent. But some researchers are still wary of androgen supplementation, as it can have harmful side effects, such as the development of prostate cancer in men and endometrial cancer in women.

Human chorionic gonadotropin is a naturally occurring protein hormone that are produced by the developing fetus and detected in most home pregnancy kits. In the form of muscle-building supplements, hCG stimulates the development of natural male and female sex steroids. The increase in testosterone levels in males by the use of hCG stimulates muscle development.

Peru's maca root supplement is made of the best hormonal nutrient herb in the world for natural testosterone production. Maca nourishes glands and helps women with natural production of testosterone hormones to increase strength, energy and sex drive.

The body has several major steroid hormones -- cortisol and testosterone in the male, estrogen and progesterone in the female. Many athletes and bodybuilders use testosterone supplements to increase muscle strength by encouraging new muscle growth. They allow the athlete to train harder and longer at any given period of time, which can improve his or her sport. While most are banned in major sports, as well as by the government, there are some safe testosterone supplements that are legal to use, and many are available over the Internet. The key is to find a legal, safe testosterone supplement that works best for you.