L-Theanine: Research, Dosing, and Where to Buy in 2026
A research-first profile for L-Theanine (Althenine, Elthenine, Theanine), aggregating mechanism notes, transcript dosing mentions, vendor recommendations, and PubMed-indexed literature without presenting medical guidance.
L-Theanine is a research compound profiled here from named-expert transcripts and peer-reviewed literature, without medical guidance. As of July 2026, The Peptide Wiki aggregates 8 PubMed-cited papers, 3 attributed expert mentions, 1 transcript dosing protocol, and 1 referenced vendor for L-Theanine, each linked to its source.
- Also indexed as Althenine, Elthenine, Theanine.
- 1 aggregated dosing-protocol mention from source transcripts.
- 8 PubMed-indexed citations listed in the research table below.
- 1 vendor recommendation captured from named experts.
- Evidence level in this entry is marked as research.
What is L-Theanine?
Research compound aggregated from creator and literature mentions. No direct disease-treatment claims are made on this page.
Experts on background and overview · 1 cited mention
"could you take GABA or phosphatidylserine or L-theanine or saffron extract"
What is L-Theanine researched for?
Amino acid from tea that promotes relaxation and reduces cortisol.
Experts on uses and effects · 1 cited mention
"eswagander root extract and althenine have been effective other than lifestyle habits and sleep on bringing down cortisol."
L-Theanine Dosing Protocols
The entries below are transcript-derived dosing mentions. They are preserved for research context and are not medical advice.
| Speaker | Source | Timestamp | Protocol | Evidence |
|---|---|---|---|---|
| Taylor | Saturday Morning Coffee Talk 6/6/26 | 00:51:14 | Taylor uses 200-600 mg L-theanine as needed for sleep. | anecdotal |
Where to Buy L-Theanine in 2026
Dynamis Online
Visit vendor → View profile →Recommended by Evan Ward at 00:01:01.
Side Effects and Safety
Anecdotal reports and study-level observations vary by route, dose, and individual. This page does not provide medical advice. Consult a qualified clinician before any research use.
What Experts Say
1 expert across our source library discuss L-Theanine. Each entry is that expert’s most context-rich mention: click to watch it at the exact timestamp in the original video. Quotes are also emitted as Schema.org Quotation JSON-LD for AI assistants.
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“could you take GABA or phosphatidylserine or L-theanine or saffron extract”
See 1 more expert mention →
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“eswagander root extract and althenine have been effective other than lifestyle habits and sleep on bringing down cortisol.”
User Reviews
User reviews aggregator coming Q3 2026 (Reddit + YouTube comments + Discord research notes). Until then, see the expert quote section above and PubMed citations below.
Research Efficacy Snapshot
Published efficacy percentages cited in PubMed trials and named-expert reports about L-Theanine. Each line links to the original source.
- "According to the CDC, 9.4% of children between 2 and 17 years old have been diagnosed with ADHD." · Anas Sohail A et al, 2021 PubMed
- "GABA/l-theanine mixture (100/20 mg/kg) showed a decrease in sleep latency (20.7 and 14.9%) and an increase in sleep duration (87.3 and 26.8%) compared to GABA or theanine alone." · Kim S et al, 2019 PubMed
- "GABA/l-theanine mixture led to a significant increase in rapid eye movement (REM) (99.6%) and non-REM (NREM) (20.6%) compared to controls." · Kim S et al, 2019 PubMed
Research and Studies
8 PubMed-indexed papers reference L-Theanine. Top 8 shown.
Legal Status
L-Theanine is presented here as a research compound. FDA approval status, scheduling, WADA status, and state-specific telehealth rules may apply. Always verify current regulatory status. Last verified: 2026-07-09.
Frequently Asked Questions
Is L-Theanine FDA-approved?
L-Theanine is presented on this page as a research compound. FDA approval status, scheduling, and state-specific rules may apply and change. Verify current regulatory status before any decision.
What dosing is reported for L-Theanine?
This page aggregates 1 dosing-protocol mention(s) from named-expert transcripts, each linked to a verbatim source timestamp. See the Dosing Protocols table above. Mentions are anecdotal, not medical advice.
Where can I buy L-Theanine?
1 vendor recommendation(s) are tracked in our directory, sourced from named-expert mentions. See the Where to Buy section above. Always verify COA and current regulatory status.
How much research has been published on L-Theanine?
8 PubMed-indexed paper(s) reference L-Theanine in our current research feed. See the Research and Studies section above for citations.