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Nope, does not do a thing .. i do take an herbal supplement i get from amazon that works really well, and it does contain melatonin- but it also has magnesium , L-theanine , passionflower, valerian, ashwaganda and some other ingredients.. not sure which of those does the trick for me, or just the combination- but i have many times tried melatonin alone and does nothing .
its doesnt work for me that well either, but in a pinch ( long flight )
what does work is pure chamomile tea.