Melatonin is a hormone which regulates the production of other hormones, especially coordinate circadian (daily) rhythm of the body. The circadian rhythm regulates essentially when we are awake and when asleep. It produced in the pineal gland in the brain and in the intestine using as structural element the amino acid tryptophan. Lack of melatonin are usually the elderly, people who are depressed because people often make long journeys and suffering from jet lag. H taking melatonin helps in cases of insomnia as it is combined with natural passion flower. The passion flower or otherwise passion flower is one of the traditional herbs used for relaxation of the nervous system. Suitable for homeopathy.