Value Per Nutrient Food 2.44 g 100 grams Leucine Duck, young duckling, domesticated, White Pekin, leg, meat only, bone in, cooked without skin, braised 2.43 g 100 grams Leucine Pork, fresh, loin, center loin (chops), bone-in, separable lean only, cooked, pan-fried 2.43 g 100 grams Leucine DENNY'S, top sirloin steak 2.43 g 100 grams Leucine Fish, tuna, fresh, bluefin, cooked, dry heat 2.43 g 100 grams Leucine Beef, top sirloin, steak, separable lean only, trimmed to 0" fat, all grades, cooked, broiled 2.43 g 100 grams Leucine Beef, round, top round, steak, separable lean and fat, trimmed to 1/8" fat, select, cooked, broiled 2.43 g 100 grams Leucine Beef, round, top round, steak, separable lean and fat, trimmed to 1/8" fat, choice, cooked, broiled 2.42 g 100 grams Leucine Game meat, deer, top round, separable lean only, 1" steak, cooked, broiled