What are the social and psychological benefits of a balanced diet?

Too many to list: You'll have a more health life overall - all systems function better - incl psych. Thus you'll have more energy, your cells will heal better and be stronger. Skin, hair, nails will look better. You'll resist more contagious diseases. Weight issues will be easier. Sleep will improve. Body smells will be more pleasant. It's hard to believe we all don't do it! Oh yes, also drink plenty of good water!