Dr Libby Collins, 37, recurrently tried fad diets to lose weight but all ended in disaster. After one nourishment, she even gained a stone.
So the Sheffield GP looked for a new way to lose some of her 18 stone. Dr Collins accessed bookies William Hill last January and bet £50, at 50-1, that she could spill out at least 70lb in a year.
Now she has scooped £2,500 after slimming down to 12st 9lb – a passing of 75lb.
She said: “I was ‘the fat GP’, getting lots of migraines and finding stress harder to trade with. I would snack on high-sugar foods or say I needed a takeaway to brook better.
“So instead I did a minimum of 10,000 steps every day and cut out unhealthy bites.” She has been supported by her librarian husband Peter, 38, and their youths Winifred, six, and Humphrey, two.
William Hill spokesman Rupert Adams guessed: “We’re now almost performing a service for the NHS.”