Originally Posted by UncaGrunny

Don't cut the fat off your steak; the body will use fat for energy more readily than it can use protein (still need the protein for other functions), and that helps keep your blood-glucose under control.

Dietary fat is not as bad for you as has long been believed, and has little to do with serum cholesterol or weight gain. Tons of recent science has been showing that low-fat diets are unhealthy, primarily because they make you hungry for carbs because you are running low on easily-convertable fuel.

Well worth your time if you want to get a deeper understanding of what is currently known about diet and its effects on metabolism:
Start Here « The Eating Academy | Peter Attia, M.D. The Eating Academy | Peter Attia, M.D.

& especially this article from that site:
How did we come to believe saturated fat and cholesterol are bad for us? « The Eating Academy | Peter Attia, M.D. The Eating Academy | Peter Attia, M.D.