Chamomile tea is the classic wind-down drink. Apigenin, one of chamomile's best-known compounds, has become a staple of "sleep stacks" in biohacking circles. A 2017 randomized trial in Complementary Therapies in Medicine tested a more concentrated version of the idea. It gave older adults 400 mg of chamomile extract a day for four weeks and tracked their sleep quality afterward.
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