Here’s some excerpts from the Wikipedia page:

“gained fame for his technique of grafting monkey testicle tissue on to the testicles of men for purportedly therapeutic purposes”

“Voronoff injected himself under the skin with extracts from ground-up dog and guinea pig testicles”

“His first official transplantation of a monkey gland into a human took place on June 12, 1920”

“Noteworthy people who had the surgery included Harold McCormick, chairman of the board of International Harvester Company, and the aging President of Turkey Mustafa Kemal Atatürk.”

“To cope with the demand for the operation, Voronoff set up his own monkey farm on the Italian Riviera, employing a former circus-animal keeper to run it”

“In the 1940s, his treatment was widely used by football players at Wolverhampton Wanderers and Portsmouth”