A Brazilian woman formerly troubled by her physical appearance, has undergone an amazing jaw-dropping transformation.

Monalisa Moura looks completely unrecognizable in new pictures after losing 11 stone by overhauling her diet and getting a gastric sleeve.

The 33-year-old said she weighed 21.9st at her heaviest and struggled with joint problems.

She told UOL: “I was never thin as a child. But I became morbidly obese in 2014 after my second pregnancy.

“I had postpartum depression, I tried to (take my own life).

“In short, six months after the birth of my second child, I reached 139kg (more than 29st).”

Determined to change her life for the better, Monalisa got sleeve gastrectomy surgery to reduce the size of her stomach to about 15% of its original size.

After the surgery, the Brazilian managed to lose a massive 71kg (around 11.2st) in two years by overhauling her diet.

Monalisa, who is now a model, weighs 10.7st and keeps in shape by eating healthily and exercising regularly. She also takes supplements to help burn fat and aid her metabolism.

The model credits her transformation, which she says was difficult, to her strong willpower.