|  | What Is It?
 Gamma hydroxybutyrate, or GHB, is a mixture of industrial chemicals. A form of it is naturally occurring in the human body in very minute amounts. Synthesized in 1960, it was first investigated as an anesthetic. For years, it was marketed as a body-building, anti-aging and sleep enhancing formula. Its sale and manufacture has been prohibited by the FDA since 1990, and the substance itself was outlawed by Congress in 2000.
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