Can probiotics alter the microbiome in breast cancer? new study investigates

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Female \> 18 years of age * Diagnosis of breast cancer (invasive ductal carcinoma \[IDC\] or Invasive Lobular Carcinoma \[ILC\]) * Minimum breast tumor size of 1.0 cm * Participants who are of childbearing potential must agree to use a medically approved method of birth control and have a negative pregnancy test result * Agree to abstain from consuming unpasteurized bacteria-fermented foods one week prior to baseline visit and throughout the study (example list provided and reviewed during informed consent process). * Agree to not change current dietary habits (apart from avoiding probiotics) and activity/training levels one week prior to screening and during the study. * Agree to complete all research activities defined in the study * Participants must have the ability to understand and the willingness to sign a written informed consent document. Exclusion Criteria: * Women who are pregnant, breast feeding, or planning to become pregnant during the trial. * Use of antibiotics within 5 weeks of randomization. * History of chronic inflammation or structural abnormality of the digestive tract (e.g., inflammatory bowel disease, duodenal or gastric ulcer intestinal obstruction, or symptomatic cholelithiasis). * Use of probiotic and/or prebiotic supplements and/or supplemented foods prior to screening and throughout the study. * Individuals receiving any other investigational agents within 30 days prior to randomization. * Change in anti-psychotic medication within 3 months prior to randomization. * Alcohol or drug abuse in the past year. * Participants with a known allergy to the test material's active or inactive ingredients.. Clinically significant abnormal laboratory results that may negatively impact the participant being involved on the study, at the discretion of the physician. * Any condition which in the investigators' opinions may adversely affect the participant's ability to complete the study or its measures or which may pose significant risk to the participant. * Physician feels participation in this trial is not in the subject's best interest.