All the subjects will be submitted in the morning, at fasting, before and after the treatment, to measurements of weight, waist circumference, blood pressure, and to determinations of serum glucose, total cholesterol, HDL-cholesterol, triglyceride, insulin, high sensitivity C reactive protein (hs-CRP), vitamin A, C, E, oxidized and reduced glutathione, NT, and resistin levels. Data about smoking habits, physical activity and mean daily nutrient intakes will be collected, respectively, by an interview, and a validated 3-day food record.