David says that a lot of it comes down to psychological interventions such as groups, groups upport its. And i guess maybe asking your partner or family not to eat crisps and biscuits next to you on the sofa exactly. It's quite interesting, because women often tend to be more successful than men at losing weight over a longer period of time. One of that is cause women tend to go to things like weight watchers, while men, you know, it seems like a female only kind of thing.