Tocopheryl acetate 20% spray for elimination of head louse infestation: a randomised controlled trial comparing with 1% permethrin creme rinse.

The most highly significant difference of outcome was in those with “wavy” hair (p < 0.01), possibly due to the quantity of preparation that could be held by the hair, which would have influenced the level of contact between the product and the lice and louse eggs.

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