The most common disorders of the thyroid gland are hyperthyroidism and hypothyroidism. Hyperthyroidism is a condition in which the thyroid gland secretes too much thyroid hormone, and hypothyroidism results in insufficient amounts of thyroid hormone.

Most testosterone boosting supplements include D-aspartic acid, often listed as DAA or D-asp, as the first ingredient. There is some debate as to whether or not D-aspartic acid is effective. D-aspartic acid is not intended to be used by people under 21 years of age.

Estrogen is the term used to describe a group of essential steroid sex hormones present in both men and women. Although estrogen has no known functions in men, it is essential for women. Estrogen promotes the development of the female sexual organs and supports a healthy reproductive system.

Many supplements claim to raise testosterone levels, including fenugreek. Increases in testosterone, the most anabolic, or growth-inducing hormone in your body, would lead to increases in lean muscle mass.

Offensive body odor can cause embarrassment and self-consciousness in women. Body odor results from the breakdown of materials contained within sweat, and behaviors and medical conditions or medications that contribute to increased sweat can increase body odor.

According to the Mayo Clinic, the average male's testosterone level drops by one percent each year after the age of thirty. By the time you are 60 years old, your testosterone level has probably dropped about 30 percent.

The hormone progesterone plays an integral role in maintaining the uterine lining so an embryo can implant and grow. The corpus luteum, the leftover remnant of the follicle that produced an egg that month, produces progesterone starting immediately after ovulation.

Exercise has been proven to have an impact on estrogen levels in women, but the type and level of impact varies from woman to woman. Depending on your fitness level, age and stage in life, your exercise routine may or may not impact your estrogen levels.

Thyroid disease affects millions of people in the United States, according to MedLine Plus. If your thyroid produces too much or not enough hormone, it can lead to problems ranging from weight changes and temperature sensitivity to cardiovascular issues.

Besides the more publicized use of testosterone to increase muscle mass for weightlifters, athletes and body builders, testosterone is also given for maladies like hypogonadism (a hormonal imbalance resulting in low sex drive and low sperm production) in men and for birth control with women.

Steroid eye drops are prescribed to treat eye infections, reduce inflammation and relieve dry eye. But their use is not without potentially harmful side effects. Steroid eye drops can sting your eyes or cause vision changes or reduce your eyes' ability to fight infection.

Cortisol is a hormone secreted by your adrenal glands in the wee hours of the morning. Cortisol also is known as the "stress hormone" due to its ability to help you adapt during stressful "fight-or-flight" situations.