I'm finding that most of the weight loss strategies people talk about are really calorie-reduction mechanisms. Intermittent fasting, keto, carb-free, paleo, all generally boil down to "eat less and maybe exercise".

The "eat less" part is caloric, really, not by volume, so vegetables are better than most for eating. I'm not saying those plans are bad - a scheme that works is a good scheme. It's interesting to see how they all come together.