Inclusion Criteria:  Patients aged ≥ 18 years Hospitalized at Columbia University Irving Medical Center/New York Presbyterian Hospital Left ventricular ejection fraction <=40% At least mild malnutrition as determined by the Subjective Global Assessment (SGA)  Exclusion Criteria:  Inability to eat orally Inability to eat independently History of dysphagia Allergy to nutritional supplement Need for inotrope and/or mechanical support at hospital discharge Listed for heart transplant Insulin dependent diabetes and/or most recent A1c >7% Having two or more results of a serum potassium >5.0 mmol/L during hospitalization or history of serum potassium >6.0 mmol/L, and/or at an excessive risk of hyperkalemia as judged by the investigators Severe renal insufficiency (estimated glomerular filtration rate <30 ml/min/1.73m^2 at discharge) Cirrhosis History of bariatric surgery Nursing home residence History of persistent noncompliance with treatment recommendations as judged by the investigators