[elindbe3]

We don't have a scientifically proven method to greatly reduce body fat over the long term. (Yes, that includes calorie counting, keto, or whatever other fad diet.) Until we do there isn't much that officials and healthcare providers can to except give out diet and exercise advice that people won't follow.

[nradov]

It has been scientifically proven that consuming fewer calories than you expend over the long term will greatly reduce body fat.

One reason the COVID-19 death rate has been low in Japan despite having a high infection rate and a high proportion of elderly population is that they have very little obesity. I don't support the coercive legal measures they use under the 2008 ”Metabo Law". But strictly from a public health standpoint they have proven effective.

https://www.pri.org/stories/2009-11-10/fat-japan-youre-break...

[elindbe3]

And if you have a way to get people, on a mass scale, to stick to a reduced calorie diet long-term then you may have a scientifically proven solution. Until you have that you do not have a scientifically proven solution. You have a method of weight loss which only works as long as people stick to it (which scientific studies show they won't).