The advice doesn’t work. If it worked, why do we still have an obesity epidemic? Are there still people who haven’t heard this message?
not everyone follows the advice? It takes a LOT of effort and discipline? Food is a powerful vice and coping mechanism. Addiction of any kind is not an easy thing to overcome especially when that addiction is so normalized.
> Are there still people who haven’t heard this message?
I think in most first-world countries no, but there is a massive difference between hearing something, understanding something and successfully implementing something
That's the whole point, low-carb takes less effort and discipline for the same result
"less effort and discipline" than what? depends on the comparison
Also, I'm sure a lot of people who have had trouble staying on the diet would disagree. Regardless of the specific regime, if a diet is restrictive (especially of things people are used to consuming) it can require a lot of discipline.
For which group of people and what cultural background?
Any advice on diet that tends towards “this works for all or most” is very likely riddled with personal bias.
After going down the rabit whole of trying to understand all the details of nutrition. What eventually worked is the simple and stupid advice: eat less, move more.
The problem is that there are no easy 30 day hacks, which is what people often expect.
From my perspective, whichever diet, it will take time and you need to make lasting lifestyle changes. The rest are implementation details.
But even if true, if you don't go for a drastic weight reduction schedule you can snack on fruits, vegetables, nuts, etc. trough the day while still staying well within approximate calorie goals. I don't quite see why you should limit yourself to 3 fixed meals.
While at some point we might be able to say with certainty diet x is better for situation y, from my experience with myself and people in my circles, in practice, the by far hardest, but most important part of losing weight is switching and staying from an unhealthy lifestyle to a reasonably healthy one, whichever philosophy that might be.
I think for a lot of people Keto offers a fairly smooth transition. Just the images of the dishes alone look 10x more appealing than what is usually associated with diet meals. But in my case, you would have to pry that European bread from my dead hands before I remove it from my diet. I would not stick with Keto for a single week. On the extreme change side, I also saw someone going straight from living off of instant ramen, burgers and energy drinks to full on vegan buying only on farmers market or make/grow it at home.
The appropriate measure for effectiveness of public health recommendations is whether the recommendations get results. It doesn't matter if simply eating less and moving more would get results, if advising people "eat less, move more" does not result in them actually eating less and moving more.
It's not useful to compare diet A with diet B, you need to compare the effect of "tell people to follow diet A" versus "tell people to follow diet B", because the likelihood of actually following the advice (influenced by ease, convenience, and compatibility with natural urges) is probably the most important part that determines what results (if any) it will achieve.
If one system or diet is much more difficult to follow than another, if "it takes a LOT of effort and discipline" then that's a serious limitation, a legitimate flaw of that system or diet. It's worthless to evaluate the effect of a process that almost nobody will do.
And this is a key argument in favor of the keto diet - that people who don't manage to achieve a calorie reduction through simply eating less or calorie counting find it easier to get a calorie reduction through this system, because it better aligns with our normal satiety mechanism.