Science has recently awakened to the role of zinc in promoting restful sleep.*  Zinc's beneficiary role in regulating sleep is not well understood, but early studies suggest it may facilitate deep sleep: the non-dreaming sleep associated with physical restoration and memory. Although taking zinc before bed doesn't actively signal to your body that it's time to sleep: alleviating a zinc deficiency may help with sleep latency (the time it takes you to fall asleep), help you stay asleep longer, and improve the overall quality of your sleep.*