I think it is possible for most of the claims in this paper regarding the properties of carbs, protein and fat to be true, such as no metabolic advantage for fats, as well as CICO being a fairly good predictor of weight loss/gain at least in the short term and yet eating keto or LCHF still being the most effective approach for weight loss, at least for those with any degree of insulin resistance, myself included.
Before going low carb I never even entertained the possibility of dieting. I was on the glucose roller coaster and had to feed the beast every couple hours or crash. I wouldn’t leave home without an orange or a bag of raisins or some other supposedly healthy food in my pocket. After going low carb I found it easy to lose weight for 3 months. Further restricting to keto got me another couple months of fairly easy weight loss. Since then it’s been more challenging with a modest rebound but through a variety of fasting practices I’m slowly losing again.
I expect I will achieve and maintain my weight goals via fasting. Eating keto makes fasting relatively accessible. I don’t find it effortless as some claim but it is manageable. I can eat a relatively effortless keto for several weeks and gain a few lbs and then do a few days of fasting and a few weeks of IF and lose it back plus a few lbs more. I’ve been at this roughly 15 months and I expect my approach will change over the coming years, but at the moment I can’t imagine having made the progress I have or sustain it going forward following the US dietary guidelines.
As I understand it only a small fraction of dieters are successful past the 1 year point. I think it would be interesting to have a survey examining the percentage who are successful and the degree of their success over longer periods, say 1 to 10 years with respect to the various diet strategies used.