After a wash out period during which volunteers will have to follow a diet devoid of all milk or milk-derived products, they will receive, in random order, either a daily dose of the probiotic, or a daily dose of acidified milk (control) for a total of three consecutive weeks. At the end of each of these period, they will be submitted to a day of investigation, during which their metabolic and inflammatory profile will be studied following the ingestion of a standard test meal. The potential for the probiotic to modulate the metabolic and inflammatory parameters will be evaluated.