Alfredo Darrington Bowman , also known as Dr. Sebi , was a Honduran self-proclaimed herbalist healer, who also practiced in the United States in the late 20th and early 21st centuries. Bowman falsely claimed to cure all disease with herbs and a plant-based alkaline diet based on various pseudoscientific claims, and denied that HIV caused AIDS. He set up a treatment center in Honduras, then moved his practice to New York City and Los Angeles. Numerous entertainment and acting celebrities were among his clients, including Michael Jackson, Lisa 'Left Eye' Lopes, and John Travolta.