Beef is not a homogeneous substance. It contains many constituent substances, just like the Beyond Burger contains ingredients, and many of the constituents ar

Beef is not a homogeneous substance. It contains many constituent substances, just like the Beyond Burger contains ingredients, and many of the constituents are analogous to Beyond Burger ingredients, which is why the taste is so close. It's also made of whatever the cow consumed, and depending on the source of the beef, that can vary a great deal. Also, the human body is very resilient as to the source of its nutrients, as long as it gets those nutrients in sufficient quantity and balance.