The patient with diabetes mellitus type requires to receive education about the disease aimed at improving knowledge and skills for their control. The objective of this study is to evaluate the efficacy of nutritional therapy and education through a multimedia site on the level of knowledge and metabolic control in patients with type 2 diabetes. Open-label clinical trial of 12 months of follow-up in 161 patients with type 2 diabetes. A total of 101 patients were assigned to the intervention group with nutrition therapy (TN) + Nutriluv (multimedia site in diabetes), 80 patients to the TN control group. The glycosylated hemoglobin (HbA1c), glucose, cholesterol, triglycerides, LDL and HDL cholesterol were measured at the beginning and end. Weight, waist circumference, percentage of fat, systolic blood pressure and diastolic blood pressure were recorded. The level of knowledge was measured with the Diabetes Knowledge Questionnaire (DKQ24). The knowledge in diabetes improved in the group with TN+Nutriluv compared with the TN group (P<0.05). HbA1c, HDL, diastolic blood pressure and waist circumference, improved in the group with TN+Nutriluv (P<0.05). In the group with TN, cholesterol HDL, diastolic blood pressure, waist circumference and the fat percentage was increased (P<0.05). They had a higher risk of having an HbA1c>7% who had more years of diagnosis of diabetes. The use of a multimedia site with education in diabetes, improves knowledge, HbA1c, and other indicators of cardiovascular risk in diabetes type 2 patients. Copyright © 2019 SEEN y SED. Publicado por Elsevier España, S.L.U. All rights reserved.