A probiotic (from the Latin, pro-, "in favor, for" and the Greek , biōtikós, "pertaining to life")refers to live microorganism that provides a benefit to the host, either directly or indirectly, by via interactions with the hosts cells or the host's microbiota. Such microorganism will interact by producing bioactives, biological compounds and macromolecules, that will produce such benefit.
Probiotics: Why we care.
To understand the reason why we care about probiotics, at how we gained our current understanding of the microbiota and the relation that exists mainly by studying the gut microbiota.
=== Gut microbiome and its benefits ====
- The gut flora can be seen as a collection of bacteria This currently has been expanded to include also archea, fungi, and viruses.
- The gut microbiome is described as a complex system of microbe-microbe and host-microbe interactions that exist in stable populations.
- The advent of antiomicrobials and antibiotics that cause dysbiosis  and leads to observation of "bacterial barrier" that prevents other microorganisms to colonize the gut.
Use of Probiotics: Present and Future
Oversight of Probiotics
iGEM 2009: Stanford's Approach to Probiotics
Probiotics and the Media links
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