What is "pineal gland"?

The pineal gland is a small endocrine gland situated deep within the brain, specifically in the epithalamus region. Often referred to as the "third eye," it plays a key role in regulating the body's sleep-wake cycle and circadian rhythm. The pineal gland produces the hormone melatonin, which is primarily responsible for controlling sleep patterns and promoting a sense of relaxation. Additionally, the pineal gland is believed to have other functions, such as regulating mood, and reproductive hormones, and possibly influencing the body's immune system. While its exact role is still being explored, the pineal gland holds significant importance in maintaining a healthy sleep-wake cycle and overall well-being.