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Jul 21, 2026

The Sleep Amino Acid With the Strongest Evidence

Magnesium is having a moment online, but the trial data on glycine is actually more consistent. Here is what holds up and what does not.

Nothing in this newsletter is medical advice. The information here supports deeper, more restful sleep and may help you fall asleep faster, but it is not intended to diagnose, treat, or cure any sleep disorder. If you're experiencing persistent insomnia, please consult a healthcare professional. These statements have not been evaluated by the Food and Drug Administration.

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