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the claim

Using permanent hair dye causes hair loss in adults.

the verdict
INSUFFICIENT LEANING
Recorded sources
3 sources for · 0 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 using permanent hair dye causes hair loss in adults?

Unclear. The retrieved items offer only partial, hedged support: a single case report links severe hair loss to an allergic PPD reaction to permanent dye, and a dermatologist says overusing bleaching or lightening formulations may cause hair loss. No item establishes that permanent hair dye generally causes hair loss in adults.

Verdict: PARTIAL LEAN · 3 sources for, 0 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 · 3
Severe Hair Loss of the Scalp due to a Hair Dye Containing Para phenylenediamine -
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Severe Hair Loss of the Scalp due to a Hair Dye Containing Para phenylenediamine - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.5402/2011/947284

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More for · 2
A study on contact dermatitis to hair dye and henna
2013
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A study on contact dermatitis to hair dye and henna. (2013). doi.org. https://doi.org/10.7241/ourd.20134.137

Is Salon or Box Dye Healthier for Your Hair?
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Is Salon or Box Dye Healthier for Your Hair?. (n.d.). health.clevelandclinic.org. https://health.clevelandclinic.org/hair-dye-safety-what-you-need-to-know-about-salon-and-box-color

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