What happens when switching from 15 years of LCHF, to a high protein, low carb diet?

After 4.5 months of 43% protein (40F/17C) I've lost 3.5 inches in the waist and dropped my body fat to around 8.1%.

That's the lowest of my adult life, and I'm 49.

Feels good, flexible, easy. pic.twitter.com/qhMHo1pXBr

— Andreas Eenfeldt, MD (@DrEenfeldt) May 24, 2021