why do humans need to eat many different kind of foods to get their vitamins etc but large animals like cows only need grass to survive?

Question

why do humans need to eat many different kind of foods to get their vitamins etc but large animals like cows only need grass to survive?

In: Biology

Answer 1

Because it is the most efficient. We can get all the nutrients we need in about an hour over all and spend the rest of the time doing stuff.

Carnivores spend 80% of their day sleeping, and herbivores spend 80% of their day eating. We spend 30% of our day sleeping and <10% eating. It’s the best of both worlds.