These Brazilian brothers think they look really hot with their fake 28-inch biceps they inject with chemicals.

Tony ‘Hulk’ Geraldo, 49, and Alvaro ‘Conan’ Pereira, 50, are so obsessed with having big muscles they pump themselves full of supplement Potenay B12, which is normally used to treat cows and horses, reports the Metro.

They now look very jacked after injecting twice a week since they were teenagers. This is despite the brothers being warned by doctors and their family to stop.

Geraldo, a dad-of-three, told Mail Online: ‘I usually tell my wife that she’s the only one who doesn’t like me. Other women love my size, they love it.’

He apparently threatened to end the marriage rather than stop injecting. Pereira was the first to start using the supplement in his biceps and legs when he was 15 and his younger brother followed him.

The brothers, who idolise Arnold Schwarzenegger, weigh 241kg in total and also eat 12,000 calories a day combined to keep themselves buff.

But the siblings, from Rio de Janeiro, seem to have heeded the advice and plan to stop using Potenay B12, which could potentially cause liver and kidney damage and death.