Probiotics are live microorganisms (e.g., bacteria) that are either the same as or similar to microorganisms found naturally in the human body and may be beneficial to health. Also referred to as “good bacteria” or “helpful bacteria,” probiotics are available to consumers in oral products such as dietary supplements and yogurts, as well as other products such as suppositories and creams.
Link to NIH NCCAM website
Link to ACS website
Link to an article : Supplements used in cancer care including probiotics
Some thoughts about bacterias TED talk Bonnie Bassler