Caitlyn Jenner has piled on 30lbs (14kg) of fat since her gender transition, according to a US report today.
The Olympic hero – who made the big reveal she had transitioned in 2015 – undergoes hormone treatments - which is one of the triggers likely to have made her pile on weight.
Diet expert Dr. Stuart Fischer, who has not treated Caitlyn, told Globe magazine: “The hormone injections have a steroid-like effect and one of the side effects of that is weight gain.
“Once the transition starts, surgery is only the beginning – there is a lifetime of hormonal injections.”
The hormones are not the only thing turning Caitlyn’s once muscular frame more curvy, with the star said to have a liking for wine.
The Dr added: “Alcohol produces fat in the body in the liver and in the bloodstream – and massive weight gain.”
As Caitlyn can’t stop her hormones, Dr Fischer warns she faces a tough battle to keep the kilos at bay.