The Addition of Probiotic Consumption to a Nutritional Intervention and Caloric Restriction on Body Weight and Composition in Overweight Participants

Limited interventional human studies suggest that probiotic supplementation may be a beneficial strategy for promoting weight loss when added to a nutritional intervention via their effects on lipid absorption and metabolic signaling molecules. The purpose of this study is to evaluate the effects of addition of a probiotic supplementation to a weight loss intervention on body weight, body composition and overall health in overweight adults.


Eligibility Criteria:
Inclusion Criteria:

* Aged 18 to 55 years
* BMI between 27.0 and 39.9 kg/m2
* Sedentary to moderate active (less than 30 minutes of physical activity, 3 times per week)
* Willingness to complete questionnaires, records, and diaries associated with the study and to complete all study visits
* Willingness to discontinue consumption of fermented foods or probiotics (e.g. yoghourts, with live, active cultures or supplements), laxatives, prebiotics and any substance for body weight control
* Willingness and ability to provide informed consent in French
* Willingness to receive random assignment to probiotic or placebo supplementation
* Committed to losing weight over the 12-week study period

Exclusion Criteria:

* Smokers
* Use of another investigational product within three months of the pre-baseline period.
* Known to be pregnant or breast-feeding or planning on becoming pregnant in the next 18 months.

  * Women of child-bearing potential not using effective contraception which include:
  * Hormonal contraceptives including combined oral contraceptives, hormone birth control patch, vaginal contraceptive ring, injectable contraceptives, or hormonal implants
  * Intrauterine devices (IUD) or Intrauterine system (IUS)
  * Tubal ligation
  * Vasectomy of partner
  * Double barrier method (use of physical barrier by both partners, e.g. male condom and diaphragm, male condom and cervical cap)
* Positive pregnancy test in women of child-bearing potential
* Menopausal women
* Allergic to milk, soy, or yeast
* Weight gain or loss of at least 10 lbs in previous three months
* Inflammatory bowel syndrome, celiac disease, short bowel syndrome, or any other malabsorptive syndrome
* Uncontrolled angina within the past six months
* Insulin-dependent diabetes (oral medications are not exclusionary)
* Serious and/or unstable medical conditions (e.g. cardiovascular, renal, lung, psychiatric illness, bleeding disorders, etc.)
* Cancer treatment (radiation, chemotherapy, surgery) within past six months or any other treatment or condition known to weaken the immune system (such as systemic corticosteroids or HIVIAIDS).
* Any physical condition deemed likely to significantly interfere with individuals' ability to participate in a nutritional intervention.
* Currently or at any point during the study participating in Weight Watcher's or another weight loss program or taking a medication for weight loss.
* Under antibiotics or treatments (medication or nutritional program) affecting body weight Intake and/or energy expenditure
* History of drug or alcohol (\> 9 drinks weekly) abuse
* Abnormal thyroid hormone levels
* Immune-compromised conditions
* Participant experiencing nausea, fever, vomiting, bloody diarrhoea or severe abdominal pain