So part of Leangains protocol is keeping yourself at a high protein intake. The standard is 1g per pound of bodyweight I believe for bodybuilders. I would think this is considered a high protein diet and if I calculated that into a 2000 calorie diet for myself it would be 36% of my caloric intake (180g.) Martin also stated that during times of caloric restriction he would recommend increasing the amount of protein so that your body has extra aminos and doesn't use muscle for energy.
My question is how much is too much protein in a given meal or in a given day? I recently ate a meal where the protein content was about 52% of the meal and I am feeling tired afterwards. I kindof thought it felt like a sugar crash, so is that too much protein? Is the protein causing insulin spikes/blood sugar swings at that intake? I know it's recommended to get about 35% of your caloric intake in protein but I'm sure that can go higher or lower depending on your needs.
For reference I am hoping to hit that 6-pack leanness level and I currently work out for about 1.5 hours MWF which includes 3x5 of lifts followed by a shorter metcon.