What are the ingredients in Pluto Water?

Answer:
"Pluto Water" was a commercially-marketed mineral water sold in the United States in the early 20th century. Its high concentration of mineral salts (likely including epsom salts/ magnesium sulfate) made it effective as a laxative (as opposed to other unsubstantiated health benefits).
First answer by Dfoofnik. Last edit by Dfoofnik. Contributor trust: 2556 [recommend contributor recommended]. Question popularity: 1 [recommend question].