L-theanine is a naturally occurring amino acid found in green tea. It's actually a big part of what makes green tea such a uniquely calming drink giving you a relaxed feeling without jitteriness.
To get a meaningful amount though (around 200 mg) you'd need to drink roughly 20 cups of green tea. Lion's Mane CALM uses AlphaWave® L-Theanine, a purified, clinically studied form that delivers an effective dose in just a few capsules.
Research shows it can help support calm clarity relatively quickly, and those benefits continue to build with consistent use over time.
Apr 2, 2026