Melatonin, often referred to as the "MSH" hormone in the context of its role in the sleep-wake cycle, is a hormone produced by the pineal gland in the brain. It plays a crucial role in regulating the sleep-wake cycle, also known as the circadian rhythm. The production of melatonin is stimulated by darkness and suppressed by light, which helps the body to prepare for sleep when it gets dark outside.

Melatonin is also involved in other functions, such as:
- Antioxidant activity, which can help protect cells from damage.
- Regulation of immune system function.
- Potential oncologic effects, as some research suggests it may play a role in reducing the risk or progression of certain cancers.

It's important to note that melatonin is not a "sleeping pill" but rather a natural hormone that helps to signal to the body that it's time to sleep. Taking melatonin supplements can sometimes help with sleep issues, especially for people with irregular sleep patterns or those who have difficulty falling asleep due to jet lag or shift work.

read more >>

Function. Acting through melanocortin 1 receptor, ��-MSH stimulates the production and release of melanin (a process referred to as melanogenesis) by melanocytes in skin and hair. Acting in the hypothalamus, ��-MSH suppresses appetite. ��-MSH secreted in the hypothalamus also contributes to sexual arousal.read more >>