Parasites???

By definition, "parasites" means "one who eats at a table of another"

Fungi are parasites - they live on our skin and internal organs, tree bark (lichen), on berries, grapes (yeast),           in soil and water.  They all perform necessary function - to maintain the health of its host, so that they can continue to live.  

Why would there be more or less "parasites"?  To digest the junk accumulated, for example.  "Candida" comes to mind.

Think before you kill...