The thyroid gland affects every tissue in your body. Positioned at the front of the throat over the windpipe, this wing-shaped gland regulates the body's metabolism and calcium balance, according to UMM.edu.

Adrenal fatigue is not a validated medical diagnosis, but rather a theory that has gained traction among some health-care practitioners.

The thyroid is a small gland located in the lower part of the neck that secrets hormones, mainly triiodothyronine, or T3; and thyroxine, or T4. When the thyroid malfunctions, hormone levels, metabolism, energy and weight can fluctuate.

Your thyroid gland is small structure in the front of your neck, just above your collarbone. Its importance for your health and well-being is far out of proportion to its size. The thyroid makes hormones that regulate the rate at which your cells burn nutrients and perform various functions.

Melasma is a skin condition that can occur as a result of hormonal imbalances. Melasma is also known as cholasma and, while there is a definite genetic component to the disease, it is generally triggered by hormonal changes.

According to women’s health expert Christiane Northrup, M.D., estrogen dominance is defined as a syndrome caused by a hormonal imbalance leading to higher levels of estrogen relative to progesterone.

Kelp supplements are sometimes used to help treat thyroid disorders, but dosages vary. It is always important to follow dosing instructions on the bottle no matter what supplement you are taking, but it is especially important with kelp. Concentrations vary, and the maximum daily dose is federally regulated.

Estrogen is a female sex hormone that is responsible for many developmental, as well as other, functions in the body. It is balanced by the hormone progesterone during menstrual periods.

Progesterone is a steroid hormone produced by your ovaries that affects your reproductive system, breasts and general growth and development. Progesterone is also the precursor of other hormones, including cortisol. Additionally, progesterone plays a role in pregnancy, menstrual cycles and mood behavior.

According to an article in "The New York Times," the existence of testosterone, a male hormone consisting of natural steroids, was first discovered in 1935. Testosterone levels in most men average between 260 nanograms and 1,000 nanograms per deciliter of blood plasma. But that measurement is not constant.

Progesterone is the precursor to many hormones, including testosterone, the sex hormone that emphasizes male characteristics, and estrogen, the sex hormone that emphasizes female characteristics.

The camphor tree is a large evergreen that grows in Florida, California, South America and Asia and is widely known for its turpentine-like smell, traditionally used in making mothballs. Camphor oils and herbs must be used topically and can be toxic when ingested.