Not necessarily. I think it works like this: 1. Standard metabolism: You need certain amouns of calories, and a certain amount of it must come from carbs. If y

Not necessarily. I think it works like this: 1. Standard metabolism: You need certain amouns of calories, and a certain amount of it must come from carbs. If you need 1200kCal in carbs, you will feel hungry until you get that 1200kCal in carbs, no matter how much fat you eat. It might be 1250kCal in plain rice, or 2500kCal in fatty chips, but it must contain 1200kCal in carbs. 2. Keto metabolism: A part of the carb need can be fulfilled with fat, at the cost of lower efficiency. You won't be hungry, almost regardless of how little carbs you eat. It's easy to see how in 1. eating sugar could help you losing weight by making you eat less in general.