The study consists of a diet-intervention in a single group under-free-living conditions. The diet was enriched with 15g of almonds and 15g of walnuts per day for eight weeks, supplied directly to the patient by the researcher. This amounts of walnuts and almonds contain polyunsaturated fatty acids of approximately 2.02g of omega 3 (alpha-linolenic acid) and 11.1g of omega 6 (linoleic acid) mostly. In a period of 14 months, the investigators recruited forty-eight sedentary subjects of 30 to 50 years old, and body mass index between 30 and 34.9 kg/m2, without evidence of chronic degenerative, infectious or neoplastic diseases, neither medication nor actually dietary treatment, and a physical level of exercise < 2 hours/week. All participants gave their written informed consent to participate in the study. The study was approved by the Institutional Ethics Committee of the Universidad de Guanajuato.