2,4-Dinitrophenol

2,4-Dinitrophenol (DNP) is an organic compound which causes rapid weight loss in humans. It’s being studied as a potential treatment for obesity, Alzheimer’s, Parkinson’s diseases, and epilepsy. In the 1930s, it was prescribed to 100,000 people in the US. It was discontinued after 2 people used 10 times the recommended dose and died.