What I bought is MgSO4.xH2O(Dry Magnesium Sulfate B.P.) I went to another farmacist and they looked in this guide book to show me the different types of Magnesium mixes and had noted that Magnesium Sulfate in general is dangerous and should not be inhaled, ingested or applied to skin surfaces. Says that can cause irreaversable side affects. I'm really confused. What are the safe Epsom Salts ?