▁protein ▁per ▁cal orie ▁( 7 1 ▁cal ories ▁total ). ▁For ▁comparison , ▁there ▁are ▁ 2 . 8 ▁gr ams ▁of ▁protein ▁in ▁a ▁serving ▁of ▁raw ▁bro cc oli ▁( 1 0 0 ▁gr ams ) ▁or ▁ 8 2   m g ▁of ▁protein ▁per ▁cal orie ▁( 3 4 ▁cal ories ▁total ), ▁or ▁the ▁Daily ▁Value ▁of ▁ 4 7 . 6 7 g ▁of ▁protein ▁after ▁e ating ▁ 1 , 6 9 0 g ▁of ▁raw ▁bro cc oli ▁a ▁day ▁at ▁ 5 7 4 ▁cal . ▁An ▁egg ▁contains ▁ 1 2 . 5 g ▁of ▁protein ▁per ▁ 1 0 0 g , ▁but ▁ 4   m g ▁more ▁protein ▁per ▁cal orie , ▁or ▁the ▁protein ▁D V ▁after ▁ 3 8 1 g ▁of ▁egg , ▁which ▁is ▁ 5 4 5 ▁cal . ▁The ▁ratio ▁of ▁essential ▁am ino ▁ac ids ▁( the ▁quality ▁of ▁protein ) ▁is ▁not ▁taken ▁into ▁account , ▁one ▁would ▁actually ▁need ▁to ▁eat ▁more ▁than ▁ 3   kg ▁of ▁bro cc oli ▁a ▁day ▁to ▁have ▁a ▁health y ▁protein ▁profile , ▁and ▁almost ▁ 6   kg ▁to ▁get ▁enough ▁cal ories . ▁It ▁is ▁recommended ▁that ▁adult ▁humans ▁obtain ▁between ▁ 1 0 – 3 5 % ▁of ▁their ▁ 2 0 0 0 ▁cal ories ▁a ▁day ▁as ▁protein . ▁ ▁Complete ▁prote ins ▁in ▁non - human ▁animals ▁Scient ists ▁had ▁known ▁since ▁the ▁early ▁ 2