Moustafa Ismail (born 1988) 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.

Do all bodybuilders use synthol?

Synthol is often marketed online as a "posing oil" to rub all over your body and give your muscles that preferred "shine" during competition. But that's not how bodybuilders typically use it. Rather, they inject the substance right into the body.

Did Valentino use synthol?

Gregg though, never used it by itself. He stacked it with equipoise and test-propionate (about 3000mg a week!) and injected that directly into the muscle. In an interview with Testosterone Nation, he said, “Synthol just works one way: it stretches the fascia.