The pineal is a teeny endocrine gland deep inside your brain🧠 that modulates sleep-wake and seasonal cycles! Melatonin is the sleepy substance 💤 that regulates circadian rhythms and gets you to bed. Descartes thought the pineal was the seat of the human soul. The gland is also thought to be the third eye 👁and is named for its pine cone-like shape. If you need a bed buddy, check out our sleep-inducing brand new pineal plush!