STIMULANTPROMISING
L-Theanine
Smooths caffeine's edge. 1:2 caffeine:theanine is the classic stack.
EFFECTIVE DOSE
100–200 mg, usually paired with caffeine
TIMING
Alongside your caffeine dose
HOW IT WORKS
Increases alpha brain waves and modulates glutamate/GABA — an anxiolytic without sedation.
WHAT THE EVIDENCE SUPPORTS
- Reduces caffeine jitters
- Small focus benefit under stress
WHAT TO LOOK OUT FOR
- Alone at low doses in a 'nootropic blend' → likely nothing.
- Doesn't 'boost' caffeine — it smooths it.
SIDE EFFECTS
- Rare — mild headache in some users
SOURCES
Reviewed 11/1/2025 · Brawn Supplement Reviewer
Educational content. Not medical advice. Talk to a licensed professional before starting any supplement, especially if you take medications or have a medical condition.