Caloric restriction creating a 10-20% energy deficit is the primary driver for weight loss on a ketogenic diet.

“And I think that people that are not losing weight or managing whatever they're trying to manage with a ketogenic diet, they need to track calories and simple caloric restriction or creating even like a 10 or 20% energy deficit will be the big lever that's going to cure 90% of what most people are seeking the ketogenic diet for.”