As a freshman medical student at Baylor in 1952 I was required to take Biochemistry. I recall being impressed when the professor explained why termites but not humans could digest wood. It had to do with a mirror image enzyme. Termites had this enzyme but humans had the reverse. I assume that he was correct??

Well, the kid on the block here sells 5 cents a glass lemonaide
This is way cheaper than what you can buy it for in the store,

maybe we could feed the world on lemonaide, from this kid?
It would be much cheaper!