Earlier quoted context omitted.
I don't know if it's a solved problem. It's very hard to get people to fast. It's even harder to get people to maintain a healthy lifestyle and body weight after going into remission.
Well, the problem is solved. People just don't want to take enough ownership over their health to actually do it.
I wouldn't be able to do my job if I did an 850kcal fast for 3 months.