Pluto Water

Pluto Water was a trademark for a strongly laxative natural water product which was very popular in the United States in the early 20th century. The water's laxative properties were from its high native content of mineral salts, with the active ingredient listed as sodium and magnesium sulfate, which are known as natural laxatives. The water's high native content of mineral salts generally made it effective within one hour of ingestion, a fact the company emphasized in their promotional literature. Company advertisements stated the laxative was effective from a half-hour to two hours after ingestion. The water was an extremely popular product. In 1919, it took 450 railroad cars to transport the bottler’s output.
Distribution.
The water was bottled at the French Lick Springs, in French Lick, Indiana, a location with natural mineral springs that was also the source of the competing Sprudel Water.
Laxative properties.
The water's high native content of mineral salts generally made it effective as a laxative within one hour of ingestion, a point emphasized in the company's promotional literature. Company advertisements stated the laxative was effective from a half-hour to two hours after ingestion. The active ingredient of Pluto water was listed as sodium and magnesium sulfate, which are known as natural laxatives. The water also contains a number of other minerals, most notably lithium salts. The sale of Pluto water was halted in 1971 when lithium became a controlled substance.
Advertising.
Advertised as "America's Laxative", Pluto Water used the slogan "When Nature Won't, PLUTO Will". The bottle and many advertisements featured an image of Pluto, the Roman god of the underworld, reflecting the water's underground origin.