We'll need a way to get the vitamins and minerals that we currently get from animal meat, too. And people are already skeptical of pill vitamins (which is likely what will be included with these new type of non-meat foods to make them look just as healthy).

A lot of the foods have already had these nutrients destroyed through processing (to resist more time on the shelf) or genetic modification (to increase yield, etc). It's part of what's leading us to higher and higher numbers people with chronic diseases, cancers, etc.

We'll see more of that as we give up "natural meat", too.