Question: what is the difference between epsom salt and magnesium sulphate?
Answer: Let's start with the obvious. If you look at the ingredients section on an Epsom bag, you will find the first ingredient is listed as magnesium sulfate (MgSO4). Epsom salt consists of some magnesium, in the form of magnesium sulfate, but it is far different than soaking in the pure potency of magnesium chloride (MgCl).