Component
Subjective jitteriness
Subjective jitteriness. Species, exposure and limitations are retained in each linked claim.
1 recorded relationships. Experimental role, claim status and evidence remain attached to each record.
How nutrients influence it
Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.
Other things that act on it
Enzymes, hormones, genes, and other components with a recorded effect. These are not nutrients, so they do not count toward the arrows above. Each finding names the chapter that recorded it.
How nutrients reach it in more than one step
Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.
Tracing routes…
What it does
Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.
What acts on it
Theanine did not significantly reduce caffeine-associated jitteriness in the same experiment.
Experimental context and source evidence
- evidence_span
- {"source_cache": "artifacts/theanine-research/17891480.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "dcd12cbd6fb30feee591192380733184f9928be3c146e39a4debc121a05b8815", "start_char": 0, "end_char": 1581, "text_sha256": "dcd12cbd6fb30feee591192380733184f9928be3c146e39a4debc121a05b8815"}
- experimental_model
- Randomized double-blind caffeine interaction experiment
- exposure
- 250 mg caffeine with or without 200 mg theanine
- limitations
- Acute caffeine exposure; no basis for treating chronic hypertension or assuming caffeine adverse effects are all prevented.
- nutrient_topic
- L-Theanine research collection; topical membership is not evidence of a direct dietary effect. · L-Theanine
- organism
- 48 healthy humans
- plain_language
- The blood-pressure result cannot be generalized to every subjective effect.
- primary_references
- [theanine-p17891480] Time for tea: mood, blood pressure and cognitive performance effects of caffeine and theanine administered alone and together. (2008). https://pubmed.ncbi.nlm.nih.gov/17891480/ DOI: 10.1007/s00213-007-0938-1
- tissue_or_cell_type
- Blood pressure, mood and visual attention
L-Theanine: metabolism, neural signaling, nutrient connections and human outcomes (2026-09-17) · lines 1017–1028
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Randomized double-blind caffeine interaction experiment · source_derived_draft · unverified_draft
### theanine-caffeine-jitteriness-null Theanine did not significantly reduce caffeine-associated jitteriness in the same experiment. Condition category: normal nutrient_topic: L-Theanine research collection; topical membership is not evidence of a direct dietary effect. plain_language: The blood-pressure result cannot be generalized to every subjective effect. organism: 48 healthy humans tissue_or_cell_type: Blood pressure, mood and visual attention experimental_model: Randomized double-blind caffeine interaction experiment limitations: Acute caffeine exposure; no basis for treating chronic hypertension or assuming caffeine adverse effects are all prevented. exposure: 250 mg caffeine with or without 200 mg theanine evidence_span: {"source_cache": "artifacts/theanine-research/17891480.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "dcd12cbd6fb30feee591192380733184f9928be3c146e39a4debc121a05b8815", "start_char": 0, "end_char": 1581, "text_sha256": "dcd12cbd6fb30feee591192380733184f9928be3c146e39a4debc121a05b8815"} [theanine-p17891480] Time for tea: mood, blood pressure and cognitive performance effects of caffeine and theanine administered alone and together. (2008). https://pubmed.ncbi.nlm.nih.gov/17891480/ DOI: 10.1007/s00213-007-0938-1
Complete structured claim and evidence
The events it takes part in
A mechanism often involves more than two components. These are the full events, with every participant and its role.
Situations it appears in
Low-supply and faulty-machinery situations recorded in the chapters where this component plays a part.
In the sources
Preserved passages that mention this component, quoted exactly. Open one to read it in context.
Open hypotheses
Proposed ideas that involve this component. They are labeled as hypotheses and do not change any recorded statement.
This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.