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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
Passed Screening
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No lab-backed pass yet
Contaminants and label claims commonly found in shampoo.
How we test shampoo
ISO-accredited labs. Zero brand influence.
Buying guide
What to look for when shopping.
Building the most comprehensive testing database for shampoo.
Get Notified When ReadyWe're preparing lab tests for this category. Join the Watchdogs to be notified when results are ready.
Join the WatchdogsProducts with no adverse findings in our screening
Products currently being tested or awaiting final analysis
Head & Shoulders
Label review complete. Published findings are still pending.
Ikko Cosmetics
Label review complete. Published findings are still pending.
Head & Shoulders
Label review complete. Published findings are still pending.
Head & Shoulders
Label review complete. Published findings are still pending.
Head & Shoulders
Label review complete. Published findings are still pending.
Head & Shoulders
Label review complete. Published findings are still pending.
Head & Shoulders
Label review complete. Published findings are still pending.
Head & Shoulders
Label review complete. Published findings are still pending.
Head & shoulders
Label review complete. Published findings are still pending.
Head & Shoulders
Label review complete. Published findings are still pending.
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.
