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A student who weighed almost 30 stone managed to drop more than half his body weight in just one year.
Twenty-year-old Kaya Tuncar lost so much weight, his lecturers at the University of Manchester assumed he was a completely new student.
Kaya, from Manchester, saw his weight creep up after living off takeaways, cheese toasties and bacon butties while at university.
But he decided to take control of his weight after experiencing pains in his chest, and took his mum's lead by following the 1:1 Diet by Cambridge Weight Plan.
His mum Michelle, 46, lost six stone on the diet, and seeing her incredible weight loss spurred Kaya on.
He said: "I used to binge eat, to the point where I wouldn't eat in public.
"My biggest things were cheese sandwiches or toasties - basically anything involving cheese and bread.
"But being so overweight left me unhappy and I knew my mum was worried about me too. But losing all the weight gave me such a confidence boost.
"When I returned to uni, I kept getting asked if I was a new student - people just didn't recognise me.
"I was so impressed by my mum, and I knew that she'd struggled with her weight - but she lost 12 pounds at her first weigh-in.
"It made me more determined, seeing my mum lose the weight and stick to it - the fact we were family, and could see each other's results spurred us both on."
Michelle decided to sign up to the weight loss plan after she was involved in an accident and had to have her knee replaced due to her size.
Determined to slim down, Michelle has gone from 20st to just 14.
She said: "I'm so proud of my self and my son.
"We both stuck to it rigidly, but my biggest achievement was going from a size 24 to a size 14.
"My bad eating habits didn't help Kaya - my biggest downfall was takeaway and pizza, and on a weekend, I'd have lager too.
"At one point, I was drinking six litres of Pepsi Max a day. But together we literally just changed our diet, and walked our dogs, Mani and Butcher.
"Now we get to do talks and inspire others - I'm so proud of us both.
"It seemed quite a strange thing, having a son and mum lose weight together and I think that's why we're asked to do talks and things like that. Because what we achieved has been so inspiring.
"Kaya had gone from a moth to a butterfly. Before, it was like my son had gone.
"Seeing him lose the weight, he's like my hero - I never thought he could do it."
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