Pineal Gland Hormone

The Location and Function of the Pineal Gland and its Hormone

  • The pineal gland was the last discovered of the endocrine glands.
  • The location of the pineal gland is near the centre of the brain
  • The pineal gland is approximately 1/3 inch long and is shaped like a pine cone
  • Pineal cells and the cells that support the pineal cells called “neuroglial cells” are what the gland is comprised of.
  • The main pineal gland hormone secreted is melatonin, a hormone which helps in the maintenance of the circadian rhythm. It is also a hormone known for its regulation of reproductive hormones.
  • One issue surrounding the functionality of the pineal gland is that it is often showing as calcified in x-rays
pineal gland

The pineal gland hormone is:


The secretion of melatonin by the pineal gland is dictated by light. Melatonin’s main role is in the maintenance and control of the circadian rhythm alongside its work in regulating certain reproductive hormones.
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