Patients over 18 years of age, admitted to the hospital with HF exacerbation, will be eligible for randomization to low salt or regular diet. Laboratory tests are routinely obtained on admission and on the day (or the day before) of discharge (comprehensive metabolic panel and NT-proBNP) and will be recorded for the study. Daily weights are routinely recorded, and intake/output will be monitored. At discharge, a Diet Acceptability Questionnaire will be performed.