We put forward that probiotics have an effect on infectious episodes evolution in subjects aged 60 years or over. The main objective of this research is to observe the effect of consumption of the probiotic on the average number of days with infectious episodes.

Inclusion Criteria:

• Subjects who accept not to alter their food habits

Exclusion Criteria:

• Food allergy
• Regular consumption of probiotics
• Diabetes
• Respiratory deficiency
• Cardiac deficiency
• Cancer or chronicle disease not stabilized
• Splenectomy, sickle-cell anemia
• Immuno depression or immunodeficiency acquired or congenital
• Immuno depressor or corticoid treatments