Melatonin Sleep-Wake Cycle and short-term treatment of insomnia

Melatonin
Paper details:

1. Melatonin is a hormone primarily released by the pineal gland at night and has long been associated with the control of the sleep-wake cycle. As a dietary supplement, melatonin is often used for the short-term treatment of insomnia.
2. Discuss the advantages and disadvantages of melatonin used as a dietary supplement compared to chemical-based sleep aids. How is the body affected by each type of sleep aid?

Sources no more than 5 years old