This brand new study suggests that drinking 480 ml of Montmorency Tart Cherry Juice or taking capsules of the tart cherry each day had little to no health benefit in the parameters tested in the study. This suggests that Montmorency Tart Cherries are a poor source of melatonin.
Here is a link to the study :
Here is a relevant quote from the abstract :
>>> ' Despite the potential benefits of antioxidants and melatonin, we did not find improvements in sleep time or quality, cellular health or BP in participants consuming MTC for 30 days, though BM decreased in capsule groups. ' <<<
This study implies that if you plan to get your melatonin and its known health benefits from cherries, that will not likely happen. Even if you are just looking for better sleep, the result is still likely to be no benefit.