Unfortunately, the food industry has not yet faced this situation and begun taking measures to avoid exploiting our weakness for not knowing when we have had enough.
There are very important and practical issues raised by following this alternative route which says, let's look to material conditions, to the systems of production, to the needs that human beings have, and to competing alternative solutions to the satisfaction of those needs.
The general proposition is that the resources that will be utilized are the ones that contribute most to the overall efficiency of the production system. The third parameter has to do with our commercial world, our search for profits.
Pigs eat grass if they are very hungry, but they can't use it as a regular source of food.