When choosing a good magnesium soap, there are a few things to consider. First, look for soaps that list magnesium as one of the main ingredients, as this will ensure you are getting all the health benefits from it. Secondly, make sure that the magnesium is combined with other beneficial components like natural oils and glycerin for added hydration. Lastly, look for soaps that come with extra vitamins and minerals such as vitamin E or calcium, which can help improve the effectiveness of the magnesium’s healing properties.