One has to define efficient. It is very efficient for an individual to eat milk, cheese, meat. However, it is not efficient for the ecosphere, as that conversion from plant to animal to human has lost energy and nutritive value.
So which efficiency are you thinking on?
Is it more efficient for people to eat animal or plant products and why?
3 answers
I am thinking of the conversion from plant to animal to human.
then it is not as efficient.