This is a randomized, controlled, open-label, prospective, multicentre clinical trial designed to assess the effects of a nutritional intervention on morbidity and mortality in patients with chronic heart failure. Through a simple 1:1 randomization process, patients will be assigned to the control group or the intervention group. Patients in the intervention group will undergo an individualised nutritional intervention program consisting of 3 pillars: diet optimization, specific recommendations ,and nutritional supplementation if nutritional targets are not achieved.