Huh, interesting. There is alot of people that say the same thing about H&S schampoo.
As far as i know there is a substance in it called zinkpyrition that seems to be common in things that treats eczema and psoriasis etc. It seems to be a substance that you can find in paint too (to paint boats for an example) but we aren’t allowed to use such paint because it’s toxic. Hmm?