When I was a boy and my mother was told by her new doctor to stop giving me enemas and was told to start giving me oral laxatives. One of her choices was Castoria. Another choice was Ex-Lax. Still another was Milk of Magnesia. She even tried the Chewing Gum laxative - Feen-a-mint and something called Black Draught. She even tried Epsom Salt mixed in water. I did not like any of them. Especially the Castoria and Epsom Salt solution. But, when I read people were giving them Epsom Salt enemas, I tried them and liked them. But, then, when I washed my hair, I began noticing the soap was stained brown. My wife takes baths with Epsom salt in them and the precipitate that is left on the side of the tub is hard to get off and similar to the brown goo that is in the soap after I have used Epsom Salt in my enemas. As a result, I don't use it any longer and I don't have a brown mixture with the shampoo soap.