" I heard that some of that stuff called "Himalayen" has a very high fluoride content."
So I have heard too.. Still; the Iodine
protocol I have put 30-40 people on works like a charm; almost all of them on Himalaya salt, in addition to.. you know!!.
Might be that "someone" wants to attack the ones having a good product.
In a full spectrum salt you will find almost every metal / mineral of the periodic system. Balanced like this with its antagonists and synergists, I see no problem with it.