I agree with you, but that's not the argument I'd make for "What you eat" over "how much you eat." The difficult part of managing weight isn't the food. The fo

I agree with you, but that's not the argument I'd make for "What you eat" over "how much you eat." The difficult part of managing weight isn't the food. The food is easy - eat less than X amount, and you will lose weight. No, the difficult part of it is mental. Food does more than simply provide nutrients. It satiates hunger and provides pleasurable experiences. People generally don't over-eat because they are lacking nutrients, they over-eat because they want the fun experiences of eating or to drive away the discomfort of feeling hungry. So if you can give yourself smart choices about what you eat, and make it extra clear what the rules are for deciding things, you can exert a ton of control over how much you eat. Personally, I've lost 40 pounds on keto (an extremely low-card, moderate protein, high fat diet). I know keto does interact with your metabolism, but I suspect that a good chunk of the weight loss was simply by removing a lot of non-satiating calories.