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the claim

Coal tar shampoo causes cancer in the people who use it.

the verdict
INSUFFICIENT LEANING
Recorded sources
2 sources for · 1 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that coal tar shampoo causes cancer in the people who use it?

Unclear. The retrieved items only partially touch the claim: one notes crude coal tar in shampoos is under scrutiny for potential risks, and another states coal-tar pitch is a known human carcinogen, but in pavement sealcoat rather than shampoo. No item reports cancer in people who use coal tar shampoo.

Verdict: PARTIAL LEAN · 2 sources for, 1 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 2
[Shampoo].
Get citation
[Shampoo].. (n.d.). cir.nii.ac.jp. https://cir.nii.ac.jp/crid/1871153443405385984

Evidence against · 1
Page 4 Advertisements Column 2 (Evening Post, 17 June 1925)
1925
Get citation
Page 4 Advertisements Column 2 (Evening Post, 17 June 1925). (1925). paperspast.natlib.govt.nz. https://paperspast.natlib.govt.nz/newspapers/EP19250617.2.17.2

See more details
More for · 1
Coal-tar-based pavement sealcoat and PAHs: implications for the environment, human health, and stormwater management.
2012
Get citation
BJ, M., PC, M., JL, C., AW, W., M, S., & ES, W. (2012). Coal-tar-based pavement sealcoat and PAHs: implications for the environment, human health, and stormwater management.. doi.org. https://doi.org/10.1021/es203699x

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