Element 32 of 37
γ-Glutamylethylamide
L-Theanine
Focus & Calm
What it does
L-theanine is the amino acid in green tea behind that calm but alert feeling. It promotes relaxation without making you drowsy, and pairs especially well with caffeine, smoothing out the jitters while keeping the focus. Trials link it to lower perceived stress and better attention, which is why it's a favorite for deep-work and wind-down routines alike.
The science
An amino acid structurally similar to glutamate that crosses the blood-brain barrier to promote alpha brain wave generation, yielding relaxed alertness without drowsiness.
Most relevant for
Focus without jitters, calmer energy, and pairing with coffee.
Key references
Personalise your stack
General wellness information, not medical advice. Consult your healthcare provider before starting any supplement.