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Methodology
Every product walks through the same independent process — purchased quietly, tested rigorously, reported without spin.
Step 1
Anonymous Purchase
We buy products ourselves from retail stores—never accept free samples from brands
Step 2
Lab Submission
Products are sent to independent, ISO-accredited laboratories for comprehensive testing
Step 3
Contamination Screening
We test for heavy metals, pesticides, microbes, and other contaminants
Step 4
Label Verification
We verify that products contain what they claim—no more, no less
Step 5
Expert Review
Our team of scientists analyzes the results and assigns ratings
Independence pledge
We accept $0 from the brands we review.
Member-funded. No advertising. No free samples. No sponsorships. That's the only way a product safety investigation stays honest.
Full lab methodology
Detailed protocols, limits, and reporting standards.
We independently test and review l-theanine to help you find products you can trust.
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Products Tested
Lab
Screening Results
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Lab analysis in progress
Methodology
Every product in our l-theanine reviews goes through rigorous, independent testing at accredited laboratories before it earns a place in the report.
At a glance
0
reviewed l-theanine products already in the report.
5
stages from anonymous purchase through expert review.
Five-stage review
The app keeps this sequence simple on mobile. On desktop we expand it into a readable dossier without changing the underlying order.
Step 1
We buy products ourselves from retail stores—never accept free samples from brands
Step 2
Products are sent to independent, ISO-accredited laboratories for comprehensive testing
Step 3
We test for heavy metals, pesticides, microbes, and other contaminants
Step 4
We verify that products contain what they claim—no more, no less
Step 5
Our team of scientists analyzes the results and assigns ratings
What we measure
Free from undisclosed ingredients like heavy metals, pesticide residues, and contamination events.
Contains what the label promises, without hidden fillers or missing actives.
Active ingredients are present at levels that can reasonably support the intended use.
Lab partners
We work with independent, accredited laboratories that meet strict quality and handling requirements.
Screened every time
Cost per serving is weighed against quality, dosing, and the evidence behind the formula.
