There are several minerals and herbs, as well as the hormone melatonin, which can be helpful with sleep. Dr. Whitaker also recommends L-theanine for sleep, an amino acid derived from green tea, which is renowned for its calming effects. Research suggests that L-theanine works by enhancing alpha-wave activity in the brain resulting in relaxation and significantly better sleep.

L-Theanine Vitamins & Supplements

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