Melatonin is a naturally occurring hormone found in the pineal gland in the brain. Valerian root is an herb found in nature.
Although melatonin and valerian root treat insomnia, they do so in different ways. Melatonin regulates the body's internal clock that controls when you wake up and fall asleep. Valerian root acts as a sedative that encourages the brain to release compounds that ease nervousness.
While both are commonly taken as capsules, melatonin is also available in lozenges and creams while Valerian Root also comes in teas and tinctures.
Melatonin may cause vivid dreams and nightmares, stomach cramps, dizziness, mood swings, low libido and headaches. Men who take melatonin experience enlarged breasts and lower sperm count. Unlike melatonin, valerian root does not lead to any major side effects, although some users do experience excitability.
Both supplements can be used to treat other ailments. Melatonin prevents sunburn and treats irritable bowel syndrome, while valerian root treats gastrointestinal problems, stress, palpitations and anxiety.