Why is everyone talking about L-Theanine?

Why is everyone talking about L-Theanine?

Author: QuickAndDirtyTips.com, Monica Reinagel, MS, LDN August 26, 2026 Duration: 11:30

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.


This is the expert roundtable on healthy aging that Monica participated in with USNWR that triggered this episode on theanine.


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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You're probably tired of the constant noise around what to eat, with every headline seeming to contradict the last. Nutrition Diva cuts through that confusion. Hosted by Monica Reinagel, a seasoned expert from QuickAndDirtyTips.com, this weekly conversation feels like getting clear, practical advice from a trusted friend who actually understands the science. Instead of pushing fads, Monica takes the latest nutrition research and unpacks it in a way that makes sense for real life, separating the solid findings from the hype. She directly tackles the questions that pop up in your own kitchen, whether you're wondering about a new superfood or just trying to pack a better lunch. The goal isn't perfection, but building a sensible, sustainable approach to food that leaves you feeling informed and in control. Tuning into this podcast means replacing anxiety with actionable knowledge, so you can make choices that are right for you without the dogma. It's a grounded resource for anyone who wants to think about health and eating well, but could do without the extreme diets and scare tactics.
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