"Most people before their surgery, their favorite foods are just what you'd expect -- ice cream, French fries, burgers, pizza," said Patricia DiLorenzo, professor of psychology at Binghamton University. "But afterward, their favorite food was salad, for example. Twenty percent of people said that their favorite foods were vegetables. Those people -- the ones who said they changed their taste preferences -- lost the most weight."

Mainstream article: https://www.sciencedaily.com/releases/2018/09/180916152716.htm

DiLorenzo and her team also found that people who liked coffee more post-surgery were also the people that lost the most weight. Coffee and vegetables share a bitter flavor, indicating that post-RYGB surgery, some patients' taste preferences shifted from high-fat and sweet foods to ones where bitter tastes were less aversive. Patients who experienced this effect lost the most weight and had lower BMIs in the long run after surgery.

Original study: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0199508

7 hours ago, Missouri-Lee's Summit said:

DiLorenzo and her team also found that people who liked coffee more post-surgery were also the people that lost the most weight.

Cool. Coffee is the winner! (Not that I'm drinking too much of that stuff or something...)