What is melatonin melatonin is a hormone produced by the brain and that is key in sleep regulation and vigil. Its segregation is conditioned by the amount of light that the brain perceives, so that it secretes more melatonin at night to help sleep and, instead, is segregating less as it clarifies the day, in order to keep us awake. Help to reconcile the dream: each vitaldin jelly be 'Jet lag' or time lag: Although it is a temporary sensation, the 'Jet Lag' can cause sleep alterations, fatigue during the day, discomfort, problems to concentrate and even gastrointestinal problems, considerably reducing the comfort of your leisure trips and business. Vitaldin offers you a delicious solution through its gummies enriched with melatonin!