← The FormularyAfter hoursL-theanine
The calm to caffeine's noise.
L-theanine is the quiet counterweight — the amino acid from tea that takes the jangle out of caffeine and eases the edges of a busy mind. On its own it's gentle to the point of subtle; paired with caffeine it's genuinely clever, which is why the two travel together. The calm to caffeine's noise.
An amino acid from tea, often paired with caffeine.
L-theanine promotes a relaxed-but-alert brain state — nudging up calming signals — without sedation. Alongside caffeine it smooths the spike and softens the crash; in the evening it just helps the mind stop sprinting.
Used to support calm focus — it smooths the edges of caffeine and eases wind-down.
Men who love caffeine but hate the jitter, and anyone whose wind-down is really a racing-thoughts problem. Broadly gentle and well tolerated.
Roughly 100–200 mg — with caffeine to smooth it, or in the evening (it's in DOWN and SLEEP) to ease into wind-down. Non-sedating, so it plays either role.
A calmer, cleaner focus with caffeine, and a gentler settling in the evening — subtle rather than knock-out. You notice the absence of jitter more than any obvious 'effect.'
Grade B — reasonable evidence for L-theanine supporting calm focus, especially paired with caffeine, with an excellent safety profile. Gentle, sensible, well tolerated.
Evidence grades describe how well an ingredient is studied — A well-supported, C emerging — not a promise of results. Educational, not medical advice. Doses are typical ranges; follow the label on the product.