Hormones play a central role in the body throughout each phase of life, orchestrating development, growth, sexual maturity, sleep, and many other bodily functions. Acting as small messenger molecules, hormones are released by glands into the blood stream to locate receptor cells on organs and tissues and bring about a specific change in the body. A well-known example of this is the hormone insulin, which is secreted by the pancreas to reduce the levels of sugar in the blood.
Our bodies have developed over thousands of years to adapt to our environment allowing us to thrive and survive. Our environment and lifestyle has changed at a relatively rapid pace since the industrial revolution, and our bodies have not been able to keep up.