“If you want to lose weight, cut out the grain and you will be shocked at the results. Just ask yourself, how do we fatten livestock?? Answer; stuff them with grain.”
Specifically corn...
Actually, the ration is a lowest cost ration. Corn is usually cheaper than wheat, oats, barley or whatever. If wheat were cheaper the effect would be similar. The point is that excess grain consumption is detrimental to humans and livestock alike. It has little to do with fructose vs sucrose—both have similar caloric density.