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Category Dossier
An editorial summary of our lab investigations — what we tested, what we found, and what to watch for.
Products Tested
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Lab findings pending
No Major Findings
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Lab findings pending
Contaminants and label claims commonly found in l-theanine.
How we test l-theanine
ISO-accredited labs. Zero brand influence.
Buying guide
What to look for when shopping.
Building the most comprehensive testing database for l-theanine.
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Every verdict backed by lab data
Products purchased anonymously from retail stores. No brand samples.
ISO-accredited labs analyze for safety, purity, and label accuracy.
Clear screening result issued: No Findings, Caution, or Findings Flagged.
Continue the dossier
Move from high-level findings into shopping guidance and the testing standards behind every report.
