The Effects of Daily Supplementation of a Soluble Fiber on the Fecal Microbiota in Volunteers.

Inclusion Criteria:

* Men and women aged ≥ 18 and ≤ 60 years;
* Body mass index (BMI) ≥ 18 and ≤ 30 kg/m²;
* With a usual normal intestinal transit (according to BSS). According to stool questionnaire completed between V0 and V1, mean of the 7 days of completion, maximum 3 stools / day and 3 stools/week minimum and with mean normal consistency
* Good general and mental health according to the opinion of the investigator: no clinically significant and relevant abnormalities of medical history or physical examination;
* Agreement to maintain lifestyle habits during the study (same dietary and physical habits);
* Able and willing to participate in the study by complying with the protocol procedures as evidenced by a dated and signed informed consent form (ICF);
* Affiliated with a social security scheme;

Exclusion Criteria:

* Suffering from a metabolic disorder such as diabetes, uncontrolled thyroidal trouble or other metabolic disorder;
* Suffering from gastrointestinal disorders such as celiac disease, Crohn's disease, functional constipation, irritable bowel syndrome or another gastrointestinal found to be inconsistent with the study according to the investigator;
* Suffering from a severe chronic disease (e.g. cancer, HIV, renal failure, hepatic or biliary disorders ongoing, uncontrolled cardiac disease, chronic inflammatory digestive disease, arthritis or other chronic respiratory trouble, etc.) or another severe disorders found to be inconsistent with the conduct of the study by the investigator;
* With a known food allergy or intolerance or hypersensitivity to any ingredient of the IP;
* Pregnant or lactating women or intending to become pregnant within 6 months ahead;
* Having undergone recent surgical procedure in the past 6 months or planned on the 2 months to come;
* Under treatment which could significantly affect parameter(s) followed during the study according to the investigator or stopped less than 4 weeks before the V0 visit, i.e. medication with impact on intestinal transit such as anti-diarrheal, anti-spasmodic,antidepressants antibiotics, antacids, laxative, antifungal, NSAI, anti-vomiting, GLP-1 receptor agonists, corticoids, opioids, narcotic analgesic and biliary acids chelator, and chronic hormonal treatment started less than 3 months ago (i.e. new method of hormonal contraception, thyroidal trouble treatment);
* Regular intake of dietary supplements or "health foods", or products known to impact intestinal microbiota, containing or rich in prebiotics, probiotics, symbiotic, fibre, fermented milk or yogurt, kefir, ultra-yeast, vitamins and minerals, or stopped less than 3 months before the inclusion visit.
* With significant change in dietary or physical activity habits in the 3 months before randomization (no hyper or hypocaloric diet, no high-protein diet, no prolonged fasting for more than one week, no planned change in the level of sports activity in the next 3 months);
* Taking part in another clinical study or being in the exclusion period of a previous clinical study;
* Under legal protection (guardianship, wardship) or deprived of his rights following the administrative or judicial decision;
* Presenting psychological or linguistic incapability to sign the ICF;
* Impossible to contact in case of emergency.