The diet is excellent for gaining muscle and bone density but you need to eat enough fat for energy and to become ketone adapted, so that the protein can be used for building.

If you are eating low/zero carb but don't eat adequate fat you will turn protein into glucose in the liver, and so still be running on glucpse, which is inefficient and inflammatory, as opposed to using antiinflammatory ketones.

The ratio is 35g fat to 100g lean muscle meat, by weight before cooking, per meal.

You should eat when hungry. If you over eat your blood sugar and insulin will rise and your ketones will drop. You also need organs twice per week, adding fat to the same ratio.