A Probiotic Blend Reduces Gastrointestinal Symptoms and Positively Impacts Microbiota Modulation in a Randomized Study

Inclusion criteria

• all participants were required to be between 30-60yr
• score ≥12 on the GSRS
• have a body mass ≥120 pounds (54.5kg)
• body mass index (BMI) between 20.0-34.99kg/m2
• normotensive (<140/<90mmHg)
• normal resting heart rate (<90bpm)

Exclusion criteria

• Female participants who were pregnant or nursing
• history of unstable or new-onset cardiovascular or cardiorespiratory disease;
• stroke, diabetes, or other endocrine disorder;
• use of any nutritional supplement known to alter the gut microbiota/microflora;
• use of probiotic supplements or prebiotic supplements in the previous 4 weeks and for the duration of the study;
• use of any antibiotics, antifungals, antivirals, or antiparasitic within 8 weeks of the start of the study or throughout the study;
• any changes in diet within 4 weeks of study start date or throughout study duration;
• if the participant was unwilling to abstain from gut altering supplements for the study;
• malignancy in the previous 5yr except for non-melanoma skin cancer (basal cell cancer or squamous cell cancer of the skin);
• prior gastrointestinal bypass surgery (i.e., Lapband);
• any known gastrointestinal or metabolic diseases that might impact nutrient absorption or metabolism [e.g. short bowel syndrome, diarrheal illnesses, history of colon resection, gastroparesis, Inborn-Errors-of-Metabolism (such as PKU)];
• any chronic inflammatory condition/disease (e.g. rheumatoid arthritis, Crohn's disease, ulcerative colitis, Lupus, HIV/AIDS, etc.);
• known sensitivity to any ingredient in the test formulations as listed in the certificates of analysis.
• currently participating in another research study with an investigational product or had participated in another research study in the past 30 days
• any other diseases/conditions that, in the opinion of the medical staff, could confound the primary endpoints or place the subject at increased risk of harm if they were to participate.