Now that Rob Kardashian is on a mission to lose weight, he is opening up to his followers about what caused the start of his weight gain.
In an Instagram post shared late Thursday, Rob posted a throwback picture of himself drinking a milkshake.
The photo seems to be from 2011, when Rob had dinner at Sugar Factory American Brasserie in Las Vegas. Mom Kris Jenner revealed in an episode of Keeping Up With the Kardashians that Rob gained more than 100 lbs in a year, but it looks like the estranged reality star is turning his life around. a source told E NEws that for the first time in a while Rob is committed to a diet, and that he is working with a chef in the process.