By comparison, trial results showed semaglutide, known as Ozempic, could lead to 15 per cent weight loss and tirzepatide, aka Mounjaro, to 23 per cent.
But she has revealed the "real reason" behind her weight loss, attributing it to a change in diet and a more active lifestyle - after gaining weight on IVF and being inactive after breaking her foot in 2020.
Katie told The Sun she consulted top doctors who suggested starting Harvey on the jabs in a bid to improve his chances of living longer.
While Mounjaro is hailed as the "King Kong" fat jabs, a new weight loss drug dubbed "Godzilla" looks set to displace it.
He's already on a lot of medication but Katie says the weight loss jabs won't interfere with those.
