Depends on how lean the meat and how dense the fat but generally only processed foods (like bread) are more calorie dense than meat. Protein and sugar (carbs) p

Depends on how lean the meat and how dense the fat but generally only processed foods (like bread) are more calorie dense than meat. Protein and sugar (carbs) provide 4 kcal per gram while fat provides 9 kcal per gram and our gastrointestinal tracts are better adapted to carnivorous than herbivorous diets (compared to, say, cows or rabbits). We're simply unable to digest a lot of the mass in fruits and vegetables like the insoluble fiber and animal husbandry's purpose is to convert that material to edible food - it'd be pretty pointless if it wasn't more calorie dense.