Humans are likely herbivorous by nature based on biological evidence. Humans have longer digestive tracts suited to breaking down plant matter, flat teeth for grinding, and weaker jaws and nails than carnivores. While early human ancestors ate some meat, their diets were mainly fruits and plants. Meat consumption increased significantly only in recent centuries when cooking made it safer to eat in larger amounts, unlike carnivores which eat raw meat. A largely plant-based diet is still more aligned with human biology and linked to fewer health issues than diets high in meat.