The Star Online
May 29, 2011
WOMEN’S WORLD By Dr NOR ASHIKIN MOKHTAK
Melatonin is a hormone produced by the body that regulates many physiological processes.
MELATONIN supplementation is a controversial issue and I hope to help readers understand the facts so that they are not misled by wild claims.
Melatonin is a hormone produced by the pineal gland, which is situated at the base of the brain. Although this hormone is best known for regulating the sleep and wake cycles, it also plays many other important roles in the body, including maintaining a healthy immune system, serving as an antioxidant, and regulating the menstrual cycle.
Functions of melatonin
Let’s look at the functions of melatonin in greater detail. Like all hormones, melatonin sends chemical messages to various parts of the body and tells the different organs or tissues to produce more hormones or carry out certain tasks. Without melatonin, other hormonal activity in the body would be interrupted.
Production of melatonin is stimulated by darkness and inhibited by light. This is what makes the pineal gland our “internal clock”, as it controls our body’s circadian rhythm – our body’s own 24-hour time-keeping system that plays an important role in when we fall asleep and when we wake up.
It may sound like a simple function, but if this internal clock is disrupted, many other neuroendocrine functions go haywire. The body’s internal functions, as well as mental well-being, can be adversely affected. For example, you may find yourself unable to think clearly, and forget key facts if your melatonin production is upset.