Best option is to eat a low carb, moderate protein with balance of calories from fats, like olive oil, nuts, grass fed butter, etc. not sure
beans and lentils are good
for you, as this causes increase in sugar in blood from high carb content. Also don't be afraid to eat fats. People who eat low carb with ultra high protein and low fat run into the gluconeogenesis problem, which is your body taking some of the ultra high protein intake and making sugar (glucose).