The purpose of this study is to investigate whether two different fermented dairy drinks consumed daily could have an effect on the intestinal immune response in healthy subjects.

Inclusion Criteria:

• Healthy male/female subjects aged from 18 to 45 years (bounds included).
• Subjects with none of the symptoms of gastrointestinal infectious diseases
• Subjects with a body mass index (BMI) between 19 and 30 kg/m² (bounds included).
• Subjects who accept to be submitted to an alimentary restriction of product with OTC and foods containing probiotics and/or prebiotics
• Subjects who regularly consume and appreciate dairy products
• Subjects who have not consumed any products or OTCs containing probiotics within the last three months.

Exclusion Criteria:

• Subjects in a situation that, in the investigator opinion, could interfere with optimal participation in the present study (e.g. non dairy-products consumer) or could constitute a special risk for the subject.
• Subjects with allergies or hypersensitivity to any component of the study product (e.g: allergy or hypersensitivity to milk proteins, or lactose intolerance)
• Subjects with any food allergy
• Subjects with auto-immune or with chronic disease or with a history of chronic metabolic or gastrointestinal.
• Subjects who have had any surgery or intervention requiring general anaesthesia in the last 4 weeks..
• Subjects with special diet requirements
• For female subjects: pregnancy, breast feeding or no method of contraceptive used
• Subjects participating in any other interventional study concomitantly or within 4 weeks of the study entry date.