3 doctors weighed in:

Does chemical lice shampoo lighten coloured hair?

3 doctors weighed in
Dr. Michael Tomeo
Dermatology
1 doctor agrees

In brief: Not necessarily

Usually these products do not bleach hair.

In brief: Not necessarily

Usually these products do not bleach hair.
Dr. Michael Tomeo
Dr. Michael Tomeo
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Dr. Richard Bensinger
Ophthalmology

In brief: No

Shampoos will not change hair color even if they contain anti-parasite agents.

In brief: No

Shampoos will not change hair color even if they contain anti-parasite agents.
Dr. Richard Bensinger
Dr. Richard Bensinger
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