When you get right down to it, farmers don’t raise grain or meat. Really, they produce three things: protein, carbohydrates, and fat.
As luck would have it, humans need those things, in varying quantities, for nutrition.
If we look more closely at one of those three things — protein — we discover that this particular component is so much more than a steak or part of a grain.
Proteins are actually amazing things — they can be enzymes, health promotants, and even medicine. Insulin is protein. Lactoferrin is protein. Humans need protein not just as nutrition in the form of hydrolyzed amino acids, but also for health as protein therapeutics.