{"id":6093,"date":"2025-03-04T09:22:05","date_gmt":"2025-03-04T09:22:05","guid":{"rendered":"https:\/\/www.lifepronutrition.com\/blog\/general\/what-is-melatonin-and-why-is-it-relevant\/"},"modified":"2026-09-16T05:39:14","modified_gmt":"2026-09-16T05:39:14","slug":"what-is-melatonin-and-why-is-it-relevant","status":"publish","type":"post","link":"https:\/\/www.lifepronutrition.com\/blog\/en\/rest\/what-is-melatonin-and-why-is-it-relevant\/","title":{"rendered":"What is melatonin and why is it relevant?\u00a0"},"content":{"rendered":"

If you have ever considered improving<\/strong> your nighttime rest<\/strong>, you have surely come across melatonin. Unlike other hypnotic drugs, this hormone has attracted interest because it acts as a \u201cbiological signal\u201d that helps you fall asleep more naturally, without forcing a state of sedation. It is also attributed with antioxidant functions, the ability to modulate the immune response, and involvement in several hormonal processes. However, its most recognized role remains synchronizing the biological clock that regulates periods of activity and rest.<\/p>\n

How it regulates our sleep: the role of the light-dark cycle:\u00a0<\/strong><\/h2>\n

Melatonin<\/strong> is produced by the pineal gland,<\/strong> a small organ located deep within the brain. There, the amino acid tryptophan is converted into serotonin and, finally, into melatonin.<\/p>\n

This process is clearly influenced by ambient light: at dusk and in dark environments, melatonin production increases to signal to the body that it is time to rest. At dawn, with exposure to light, secretion decreases rapidly, facilitating activation and wakefulness.<\/p>\n

The circadian mechanism: a 24-hour clock :<\/strong><\/h2>\n

Our body functions according to a daily cycle<\/strong>\u2014known as the circadian rhythm\u2014of approximately 24 hours. This \u201cinternal clock\u201d regulates body temperature, hormone secretion, and the sleep-wake pattern. As mentioned above, under normal dark conditions, melatonin secretion reaches its peak around 2 or 3 in the morning, then falls to its lowest level when we perceive daylight.<\/p>\n

This pattern explains phenomena such as jet lag. When we fly between distant time zones, our brain continues secreting melatonin according to the previous schedule, and the body takes days to readjust to the new local time. The same happens in workers with rotating or night shifts: their pineal gland receives light signals that are out of sync and does not know whether it should secrete melatonin or inhibit it. Taking exogenous melatonin can serve as a \u201creset\u201d to align the environment (light and darkness) with the internal biological rhythm.<\/p>\n

Immediate-release vs. sustained-release melatonin:<\/strong><\/h2>\n

In today’s market, melatonin is available in different formulations, the most common being immediate-release <\/strong>and sustained-release<\/strong> melatonin.<\/p>\n