moustafa ismail: XoilacTV

Moustafa Ismail is an Egyptian bodybuilder, who once held the Guinness World Records for the largest upper arm circumference in the world. This has been attributed to his extensive synthol use.

The man who has the biggest arms in the world—a whopping 31 inches—is Egyptian bodybuilder Moustafa Ismail. He used to hold the Guinness world record for the world's largest biceps until suspicions arose that he'd used site enhancement oils (synthol) to artificially inflate the size of his arms.

Muscle & Fitness editor Shawn Perine questions the legitimacy of Moustafa Ismail's claim to have the world's largest biceps, based on his suspicion of using synthol injections. He offers to fund a medical test and donate to charity if Guinness agrees to reconsider the record.

Learn about Moustafa Ismail, the Egyptian bodybuilder who holds the Guinness World Record for the largest biceps at 31 inches. Discover his training, nutrition, and genetic secrets, as well as other legends and facts of bodybuilding.