Caffeine + L-Theanine
People mainly take Caffeine + L-Theanine for focus, energy, anxiety. Based on 46 first-hand reports. Ranked #4 of 1,974 overall.
72
User score
Mostly positive59% positive15% mixed4% negative22% unclear
Of reports that state an outcome, 76% are positive.
Clinical research
Research pending
What Caffeine + L-Theanine does, according to users
Of the people who reported each effect, the share who said it got better.
2 more with fewer than 3 reports
betterno changeworse
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
Research data for Caffeine + L-Theanine is being compiled.
Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
100mg caffeine + 200mg theanineas reported
100 mg caffeine + 200 mg l-theanineas reported
200mg caffeine + 400mg l-theaninebefore writing
200 mg l-theanine + 160 mg caffeineas reported
200 mg caffeine + 400 mg l-theanineas needed
dailyas reported
Reported side effects
How often each side effect came up across all reports.
drowsiness ×1brain fog ×1frequent urination ×1insomnia ×1
What users say
Verbatim quotes, shortened only — each links to the original discussion.
“More productive with caffeine and l-theanine”
“Try Caffeine + L-theanine first.”
“Caffeine + L-Theanine (taken together) are helpful if you really want to/cannot continue taking Adderall”
“Caffeine + L-theanine. Thats stronger then just caffeine on its own.”
“Just checked the FAQ, caffeine + Theanine combo is the most recommended. Is that the general consensus here?”
Top discussions (5)
- Alcohol alternatives? ↗
- Sober ways to loosen up in a party ↗
- Adderall healthy alternatives ↗
- Caffeine + L-Theanine changed my life ↗
- A combination of green tea, rhodiola, magnesium and B vitamins modulates brain activity and protects against the effects of induced social stress in healthy volunteers - 2022 ↗
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User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate