If you are going to do low
carb, you have to do it correctly. Protein us insulinogenic. If you eat low
carb ultra high protein meal, your body with pump insulin into blood stream, which is then followed by drastic lowering of blood sugar (feeling tired, sluggish, etc) and then to compensate, the body generates glucose from some of the protein via a mechanism called gluconeogenesis. Kind of a bummer, if you are avoiding sugar to begin with and then your body creates it from protein.