I can one up everyone. I lost weight on an almost all-fruit diet. And also weight on an almost all-meat diet. What they had in common was simple foods that satiated me and did not impel me to overeat.

I've been part of diet communities with keto dieters for awhile and I have met people who have gained weight on keto. These people seem to not be as satiated from things like bacon as more successful keto dieters.

I eat a more diverse diet now. I stay away from foods that cause me to overeat like fries.

How many of those 20 kilos was lost muscle mass? Protein intake is crucial for muscle maintenance. Body cannot synthesize it from either fat or carbs.