[teilo]

Yes I disagree with that. Dietary fat is not required to enter ketosis. On a lean protein diet, you will indeed go into ketosis, and your body will start using its own fat reserves to produce ketones. However, the transition to ketosis will be more difficult.

In fact, the biggest mistake keto dieters make is to assume that "fat doesn't make you fat". That's just wrong. On any high-fat keto diet you will burn dietary fat before burning your own fat. If weight lost is one's goal, it is essential to limit fat intake to moderate levels, just enough to keep you sated, so that the body is using its own fat reserves.