This means that drinking tart cherry juice everyday increases the Melatonin in your body. Why is this good? Melatonin supplements are used to help individuals who suffer from insomnia, helping them to fall asleep, stay asleep, and be well rested in the morning. This Melatonin can be found in dried cherries, frozen cherries, as well as cherry juice. When cherries are taken on a regular basis, it will help regulate a person’s natural sleep cycle as well as improve their quality of sleep.