I Took L-Theanine — Here’s What Actually Happened

About This Video: L-Theanine is often called “the calm caffeine” but does it actually work for stress, anxiety, or sleep, or is it just another overhyped supplement? In this video, I break down what L-Theanine is, how it works in the brain, what the research really shows, and whether it’s worth taking as a supplement. I also explain the difference between regular L-Theanine and Suntheanine®, dosage ranges used in studies, safety considerations, and which medications you should be cautious with. Plus, I share my own 30-day experience — the doses I tried, what I noticed, and what didn’t change at all. If you’ve been considering L-Theanine for stress, anxiety, mood, or sleep support, this video will give you a clear, balanced picture so you can decide if it’s right for you. TIMESTAMPS 00:00 – What do sencha, matcha and oolong have in common? 00:12 – Introducing L-Theanine 00:32 – What this video covers 00:55 – Why I tested it myself 01:15 – What is L-Theanine? 01:45 – Why green tea alone isn’t enough 02:05 – How L-Theanine works in the brain 02:40 – GABA, serotonin, dopamine explained 03:10 – Literature review: stress & anxiety studies 04:15 – Conflicting evidence from 2019 trial 04:55 – Sleep studies and ADHD research 05:30 – L-Theanine + GABA synergy 06:05 – Recommended dosage ranges 06:35 – My advice on starting doses 07:00 – Safety and interactions 07:45 – Medications to avoid mixing 08:25 – What is Suntheanine? 09:05 – Marketing claims vs reality 09:40 – My 30-day experience 10:35 – What I noticed & what I didn’t 11:10 – Should you take L-Theanine? Disclaimer: This video is for general education only and is not medical or pharmaceutical advice. It should not be used to diagnose, treat, or replace advice from your own doctor or pharmacist. Always speak to a qualified healthcare professional before starting or changing any medication or supplement.