Melatonin

People most commonly use melatonin for insomnia and to improve sleep in a variety of conditions, such as jet lag. It is also used for depression, chronic pain, dementia and many other conditions, but there is no good scientific evidence to support most of these uses. What is melatonin?

Serotonin

Serotonin plays a key role in body functions such as mood, sleep, digestion, nausea, wound healing, bone health, blood clotting and sexual desire. Too low or too high levels of serotonin can cause physical and mental health problems. Serotonin is commonly known as the 'happiness hormone'.