Does vegan food have a lower nutritional density? In other words: Do vegans need to eat more to get adequate levels of nutrition than they would on an omnivorous diet?
Meat tends to sit in the intestines for a long time. Is this because meat has a higher nutritional density, and that is why it takes the body longer to digest it, or is it because meat-eaters consume less fiber? It seems plant-based foods digest quicker, but is this due to lower nutritional density or to higher levels of fiber intake in plant-based diets?