Hormones affect almost every physiological process. They are the kind of chemical signals responsible for transmitting information. The human body produces about 70 hormones which are able to signal for inflammation, reproduction, hunger, satiety, energy level, and almost any other function needed to survive.

Chemicals known as xenobiotics or xenoestrogens found in plastics, pesticides, food additives, and many others common household products can trigger a change in the hormone level. Some of them promote the release of proinflammatory cytokins, such as tumor necrosis factor (TNF-α).

Hormones secreted by thyroid gland (thyroxine, calcitonin and triiodothyronine) influence beauty and well-being. Thyroxine is important for the skin because it affects its nutrition by assisting with the subcutaneous fat formation. It also regulates the activity of sebaceous glands, leaving the skin tight and firm, and additionally, making your hair look shiny and silky. Calcitonin prevents calcium loss from the bones. Triiodothyronine boosts your metabolism, which helps to maintain your figure. Hyperthyroidism causes insomnia, excessive sweating, and heart palpitations; while the symptoms of hypothyroidism include: fatigue, increased sensitivity to cold, coarse and dry hair. It can be prevented by taking the right dietary supplements which support the endocrine system.