Tequial Serum Ligth Blue 5G Melatonin Spray 50Ml is a natural medicine and phytotherapy product containing melatonin. Melatonin is a hormone produced by the pineal gland in the brain that regulates the sleep-wake cycle. This product is used as a supplement to help regulate sleep and combat sleep disorders such as insomnia. The spray is easy to apply and quickly absorbed. It is important to follow the directions for use and consult a health care professional before use.