Humans lack the digestive enzymes and specialized anatomy to break down cellulose, the main component of grass, unlike herbivores. Early human ancestors consumed plant material, but their digestive systems weren’t adapted for large quantities of cellulose-rich grasses. Grass offers minimal nutritional value, making it an unsuitable food source for humans, who require a varied diet. Humans lack the digestive enzymes and specialized anatomy to break down cellulose, the main component of grass, unlike herbivores. Early human ancestors consumed plant material, but their digestive systems weren’t adapted for large quantities of cellulose-rich grasses. Grass offers minimal nutritional value, making it an unsuitable food source for humans, who require a varied diet.
