Natra Sleep’s formula that is gnc melatonin is composed of 5 herbal extracts: passionflower, lemon balm herb extract, valerian root, chamomile flower, suntheanine l-theanine. While the chemicals in passionflower and chamomile flower do produce calming effects, the main sleep-inducer in this product is valerian root extract. For details visit http://www.topsleepaids.com/review/gnc-natra-sleep/
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