Brother, it’s been proven conclusively. Hundreds of thousands of people have done the experiment including myself. Saifadean talks about it often.
I’ve eaten 2-3 lbs of beef or lamb only for years. Very minimal organ meat like a pound a year or less per year.
Gained muscle and strength, nails got stronger and lost ridging, I heal faster, get tan much easier, have endless energy, can fast and lift, fast and backpack or work construction all day in the heat. My body makes all the glycogen I need and I never have a drop in energy because I run out like I used to when I was metabolically reliant on exogenous carbohydrates.
It is a different existence and I am proof that it works flawlessly. I wouldn’t claim it if I hadn’t done it and experienced it myself.