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Does L-Theanine Affect Hormones? | What Changes, What Doesn’t

L-theanine isn’t a hormone, and human research hasn’t shown it directly raising or lowering sex hormones or thyroid hormones. If you’ve heard that L-theanine “balances hormones,” you’re not alone. It’s popular for calm, sleep, and focus, so it’s easy to assume it must be nudging cortisol, melatonin, or even testosterone. The real story is less

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