Absorption is better established than a clinical mechanism
The kinetic study detected theanine and its metabolites in people. It does not establish which molecule explains a cognitive effect. Source
Read the substance articleCHEMICAL FAMILYDefinition: sourced draft
Amino acid derivative
A chemical grouping, not a shared claim of cognitive benefit.
Mechanistic context
Connections & claims
Open graphEach relationship keeps its participants and their roles together. Source details explain what the connection supports.
Human uptake was comparable from the tested tea and capsule preparations.
Healthy volunteers in a small crossover study.
- L-theaninemeasured-compound
- Amino acid derivativechemical-family
Limitation Uptake does not establish a cognitive mechanism or equivalent exposure from every product.
L-theanine · Sourced draftEnergy availability in muscle
Creatine connects tissue energy metabolism and exercise research.
- Amino acid derivativechemical-family
- Energy bufferingmechanism
- Exercise performancerelated-outcome
- Creatinesubstrate
Linked substances
2 entriesTagged articles and participants in the relationships above. A shared tag alone does not establish a causal effect.
Amino acid derivative
Creatine
An endogenous compound used in muscle energy metabolism. Supplementation research is strongest around muscle stores and exercise.
Sourced draftAmino acid derivativeL-theanine
A tea-derived amino acid studied alone and alongside caffeine. Small attention studies offer useful signals, with important limits.
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Definition sources
Supporting reading for this original editorial definition. Independent editorial review has not been recorded.
Observation & claim sources
- Randomized crossover study · 2012
Kinetics of L-theanine uptake and metabolism in healthy participants are comparable after ingestion via capsules and green tea
Measured uptake and metabolites after tea or capsule ingestion in 12 healthy participants.
Limitation Small study focused on exposure, not clinical benefit or long-term safety.
Funding / disclosures Not assessed; consult the original disclosure.
Source in L-theanine