The Pineal Gland
The pineal gland, a unique structure in the brain, plays a crucial role in releasing melatonin, which regulates our internal biological clock. This clock, while not perfectly precise, is influenced by external factors such as light, temperature, and daily activities. Melatonin levels signal to the brain and body the time of day, ensuring we stay synchronized with the 24-hour cycle.In this clip
From this podcast

Huberman Lab
Dr. Matthew Walker: The Science & Practice of Perfecting Your Sleep | Huberman Lab Podcast #31
Related Questions
Is it true that the SCN acts as the body's master clock and upon receiving stimuli from photoreceptors, sends out signals that control the release of hormones like cortisol and melatonin, as discussed in the episode Dr. Matthew Walker: The Science & Practice of Perfecting Your Sleep | Huberman Lab Podcast #31 and the clip The Pineal Gland?
Is it true that the SCN acts as the body's master clock and upon receiving stimuli from photoreceptors, sends out signals that control the release of hormones like cortisol and melatonin, as discussed in the episode Dr. Matthew Walker: The Science & Practice of Perfecting Your Sleep | Huberman Lab Podcast #31 and the clip The Pineal Gland?