877. L-theanine, an amino acid found in tea leaves, is having a moment with longevity enthusiasts and menopause influencers alike, promoted to calm anxiety, clear brain fog, improve sleep, and slow aging. But does the research hold up? In this episode, Monica breaks down what the studies on L-theanine actually show about attention, sleep quality, stress, and cellular aging, and why a cup of coffee or a short nap might do just as much for your focus.

References

Cognitive and affective effects of L-Theanine: a systematic review and meta-analysis of 31 randomized trials | Molecular Psychiatry

The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis - ScienceDirect

L-Theanine Extends the Lifespan of Caenorhabditis elegans by Reducing the End Products of Advanced Glycosylation

l-theanine: From tea leaf to trending supplement – does the science match the hype for brain health and relaxation? - ScienceDirect

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Why is everyone talking about L-Theanine?

Nutrition Diva

Why is everyone talking about L-Theanine?