Keep you on track to lose weight or keep it.
During the day input into an app everything you eat. When it’s dinnertime, the app will tell you if you should maybe skip it. If you are still very hungry, it will show you what you can still eat if you insist.
It would be nice if such a reverse connection exists.
Do a controlled study. Teach one group of people how to increase their productivity, and measure their weight and body fat, and also their level of productivity. The control group is not taught how to increase their productivity and is also measured.
If you can lose weight without giving up your favorite foods, you might have a better chance of success.
A website or app, where you can choose your favorite foods from a list, and in return, you’ll get the diet that should work without you having to give up your favorite foods.