01
Seal
A sample of each shampoo goes into a sealed vial. Nothing added, nothing filtered.
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Drop 001 · Personal Care
An independent screening program for shampoo — the follow-up to the 136-product study we announced in March 2026. We sample the air above the liquid and let the instrument report which volatile compounds show up.
Screening is in progress. Nothing publishes until it clears our confirmation standards — members see it first.
DROP 001 — SHAMPOO
Products
136
Test categories
12
Market coverage
~95%
Brand sponsors
0
The story so far
In March 2026, TPR announced the most comprehensive independent shampoo study conducted in the United States: 136 products across mass-market, baby, salon, celebrity, medicated, textured-hair, and store brands — roughly 95% of what America actually buys — with zero brand sponsorships.
How the screening works
01 Seal
A sample of each shampoo goes into a sealed vial. Nothing added, nothing filtered.
02 Warm
Gentle heat drives volatile compounds into the air above the liquid — the headspace. That air is what gets sampled.
03 Read
The instrument separates the vapor into individual compounds. Anything notable is flagged for confirmatory testing before any report goes public.
What a flag means
A reason to run confirmatory testing on that sample. It's the start of an evidence trail, not the end of one.
What a flag doesn't mean
A verdict. We don't hand down safety verdicts — we publish what was measured, in which sample, with the method printed next to it.
Our headspace instrument is completing validation now. No screening result publishes until it meets the confirmation standards in our methodology.
How we testEvidence tiers
Lab backed
An instrument measured this exact product sample. The method is shown with the result.
Source backed
Grounded in regulatory or published third-party data covering this product or its source.
Label only
What the manufacturer discloses. Useful — and clearly marked as unverified.
Insufficient data
When we don't know, the report says so. No score dressed up as knowledge.
Every product report in the app carries its tier, so you always know what's behind a number.
Membership
Full access to every lab report
See results before they go public
Priority vote on what we test next
We notify you when your product hits the lab
First-time members: 30-day free trial, card required now, $99.99/yr charged automatically on day 30 unless canceled. Returning members are billed $99.99/yr at checkout. Cancel anytime online.
Get notified
One email when shampoo results publish. Until then, nothing — that's the deal.
The Product Report is member-funded and takes $0 from the brands it screens. TPR does not make safety claims or provide medical advice.
Drop 001 · Personal Care
An independent screening program for shampoo — the follow-up to the 136-product study we announced in March 2026. We sample the air above the liquid and let the instrument report which volatile compounds show up.
Screening is in progress. Nothing publishes until it clears our confirmation standards — members see it first.
DROP 001 — SHAMPOO
The story so far
In March 2026, TPR announced the most comprehensive independent shampoo study conducted in the United States: 136 products across mass-market, baby, salon, celebrity, medicated, textured-hair, and store brands — roughly 95% of what America actually buys — with zero brand sponsorships.
Products
136
Test categories
12
Market coverage
~95%
Brand sponsors
0
How the screening works
01
A sample of each shampoo goes into a sealed vial. Nothing added, nothing filtered.
02
Gentle heat drives volatile compounds into the air above the liquid — the headspace. That air is what gets sampled.
03
The instrument separates the vapor into individual compounds. Anything notable is flagged for confirmatory testing before any report goes public.
What a flag means
A reason to run confirmatory testing on that sample. It's the start of an evidence trail, not the end of one.
What a flag doesn't mean
A verdict. We don't hand down safety verdicts — we publish what was measured, in which sample, with the method printed next to it.
Our headspace instrument is completing validation now. No screening result publishes until it meets the confirmation standards in our methodology.
How we testEvidence tiers
An instrument measured this exact product sample. The method is shown with the result.
Grounded in regulatory or published third-party data covering this product or its source.
What the manufacturer discloses. Useful — and clearly marked as unverified.
When we don't know, the report says so. No score dressed up as knowledge.
Every product report in the app carries its tier, so you always know what's behind a number.
Membership
Full access to every lab report
See results before they go public
Priority vote on what we test next
We notify you when your product hits the lab
First-time members: 30-day free trial, card required now, $99.99/yr charged automatically on day 30 unless canceled. Returning members are billed $99.99/yr at checkout. Cancel anytime online.
Get notified
One email when shampoo results publish. Until then, nothing — that's the deal.
The Product Report is member-funded and takes $0 from the brands it screens. TPR does not make safety claims or provide medical advice.