
A hormone supplement typically used to support sleep cycles, although discussed here regarding the risks of high dosages and its biological effects.
I am not a big fan of melatonin supplementation for a number of reasons, but just as a quick aside, the levels of melatonin that are in most supplements are far too high
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"Huberman specifically discusses melatonin supplementation, mentioning its common usage while advising caution regarding physiological dosages and its effects on hormones."