Probiotics: foods or supplements containing LIVE microorganisms which support healthy microbiota.
Microbiota: the totality of living microorganisms in a given region, usually the human digestive system or “gut”.
Microbiome: the total gene pool of all the microorganisms we're host to (About 10 times as much as our genes...)
Dysbiosis: the situation when there is a preponderance of pathogenic (“bad”) bacteria. In other words, the “bad bugs” are up in number and “the good bugs” are down.