Vitamin C Supplementation Intervention

Inclusion Criteria:

Patents recruited will have a diagnosis of chronic HF, either preserved or reduced ejection fraction. The diagnosis and etiology of chronic HF will be confirmed by a HF cardiologist using established criteria.

Other criteria:

have undergone evaluation of HF and optimization of medical therapy,
vitamin C supplementation <500 mg/day
have not been referred for heart transplantation,
able to read and speak English,
>1 month from any inpatient hospitalization

Exclusion Criteria:

history of renal stones or renal disease (serum creatinine >1.5,
history of glucose-6-phosphate dehydrogenase deficiency (G6PD) and cognitive impairment that precludes giving informed consent or ability to follow protocol instructions
pregnant