01
RANDOMIZED CONTROLLED TRIALPUBLISHED 2011⚠ SMALL SAMPLE SIZE (N=44); ONLY MEASURED EFFECTS UP TO 70 MINUTES, SO LONGER-TERM BENEFIT IS UNKNOWN.
Combination with caffeine improved task accuracy and alertness in young adults.
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SUPPLEMENTS
• MIXED
L-Theanine for Focus
RESEARCH
- Improves focus with caffeine
- Boosts alertness, cuts tiredness
- May aid brain cell growth
- Inconsistent results overall
COMMUNITY
- Limited discussion found
⚠
SAFETYGenerally well-tolerated; check with a doctor if you take other medications or are pregnant.
WHAT THE RESEARCH SAYS
ALL 15 ON PUBMED ↗BASED ON 15 PUBMED STUDIES
02
RANDOMIZED CONTROLLED TRIAL⚠ STUDY FOCUSED ON A SPECIALIZED LAB TASK (CUED VISUAL ATTENTION SHIFTS); REAL-WORLD FOCUS BENEFITS MAY DIFFER.
L-theanine with caffeine improved attention in a specialized visual task.
03
IN VITRO STUDYPUBLISHED 2018⚠ LABORATORY CELL CULTURE ONLY; NO EVIDENCE THESE MECHANISMS TRANSLATE TO IMPROVED FOCUS OR COGNITION IN LIVING HUMANS.
May promote nerve cell growth in lab studies.
WHAT PEOPLE SAY
READ THREADS ON REDDIT ↗COMMUNITY SENTIMENT
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COMMENTS
Add context that might help others — skin type, conditions like PCOS, what you'd tried before. The more specific, the more useful.
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