The BBC Radio Ulster and Radio 5 Live presenter has consistently and publicly acknowledged a decades-long battle with his weight.
He has spoken candidly about how obesity has been a persistent challenge in his life, even previously revealing that he believes he is not a success in life because of a failure to manage his weight.
“I hate people suggesting I’m successful because I’m not,” he said back in 2021.
“Being a millionaire is not a success to me. The two things I would consider successful would be to have a normal weight and children. I don’t have either.”
Taking to Facebook on Saturday afternoon, the 52-year-old shared that he has already lost around seven stone through diet and exercise, stating: “Over a year ago, I was 23st 3lbs.
“I’m 16st today, but at gym training as my target is in the 15’s by this Tuesday.
“Started fat jabs 4 weeks ago. Two stone off with intense training.
“Always consult your Dr first. There are side affects. Will let you know if I hit my target on Tuesday”.
In 2019, Nolan embarked on a widely reported dramatic weight-loss effort.
Over about four months he shed approximately eight stone, dropping from over 22 stone to around 14 stone 12 lbs – a transformation he documented on social media.
That phase involved a very low-calorie diet reported at around 650 calories per day, combined with a rigorous gym routine aimed at hitting weight targets for a holiday in California.
‘Fat jabs’ is a popular, informal term for a newer class of prescription weight-loss injections that reduce appetite and help people lose weight.
Doctors usually refer to them as GLP-1 (or GLP-1/GIP) receptor agonists.
They are once-weekly, or daily injections that mimic hormones your body already uses to regulate hunger and blood sugar.
Stephen Nolan is in the latest phase of his weight loss journey
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The best-known ones are: Wegovy (semaglutide), Ozempic (same drug, licensed for diabetes but often discussed in weight-loss contexts), Mounjaro (tirzepatide) and Saxenda (liraglutide).
Some were originally developed for type 2 diabetes, then found to cause significant weight loss.
It is unknown exactly which injection Nolan is taking, but many celebrities have also shared experiences of trying the various options.
Global tennis superstar recently said that she has “lost over 31 pounds using my GLP-1 and I was really excited about that weight loss”.
Weight-loss injections are prescription medicines and are not suitable for everyone. They should only be used under medical supervision following a proper health assessment.
Common side effects include nausea, vomiting and bowel problems, while rarer but more serious risks can include gallbladder disease and inflammation of the pancreas. Doctors warn that rapid weight loss can also lead to muscle loss if nutrition is inadequate.