A mum-of-two who weighed 27 stone lost almost half her body weight after medics told her she'd otherwise soon be dead.
Rushed to hospital with heart failure in January 2019, Colleen Alway recalled how, at her bedside, her family were even advised to help her "get her affairs in order" because she didn't have long left to live.
"I'd been having trouble breathing and when the doctors ran some tests they told me only 15% of my heart was actually still functioning," said the 48-year-old from Margam in Neath Port Talbot, whose overeating and more than 40-a-day smoking habit had left her barely able to walk.
Read more: Clinically obese man loses 7st and becomes bodybuilding champion
"I remember one of them saying that he didn't know how I'd managed to survive that long. He then told my sisters I'd be lucky to see another five years given the state I was in."
However, it was a male nurse working on her ward - "a lovely lad called Liam" - who told her all about Slimming World.
"He'd recently lost 10 stone himself and recommended I give it a try," said Colleen.
"So, after I was discharged, I went to my local branch and hobbled up to the front doors on a pair of sticks.
"But that's as far as I could get - I had no confidence, you see. My anxiety was through the roof and I was afraid if anyone saw me they'd just point and laugh.
"I must have gone back and fore to that door three times before I mustered the strength to go in."
And, once she did, Colleen admitted she's never looked back.
"I've always been big and have always had a problem with food, especially takeaways and sweet things.
"I also smoked a lot - 40 cigarettes a day, plus roll-ups.
"So I'd have no energy and would even struggle to go from the front door to my garden gate."
Having had asthma since childhood didn't help the situation either.
"In later life I'd get a cold each winter which would turn into flu. That would then become a chest infection before eventually developing into pneumonia.
"I'd be in and out of hospital every Christmas - right up until that point where I was told that if things didn't change I wouldn't be around much longer."
And by making little alterations to her lifestyle she said she's noticed a huge difference.
"It's not about denying yourself all the things you like to eat. Just being sensible and using a lighter cooking oil or grilling food instead of frying it can make a big impact.
"I've also joined a walking group and regularly stroll along the prom at Aberavon beach - and, while I still have to stop for the occasional breather, I never could've managed that before.
"I'm now down to 15 stone and feel so much healthier and happier.
"It's scary to think how close I got to the edge though."
To get the latest email updates from WalesOnline click here.