Melatonin is a hormone participating in the sleep-wake system and it is secreted from the pineal grand in the brain. Melatonin secretion is individual, and it varies depending on several factors. Melatosell® Long contains 1,9 mg melatonin / tablet. The long-acting tablet does not break immediately when it comes into contact with digestive fluids, but the tablet forms a gel-like mass from which the melatonin is released gradually in the gastrointestinal tract. The product does not contain any ingredients of animal origin.