Evidence Level
Moderate
Hawthorn is one of the most studied herbal remedies for cardiovascular support. The Cochrane Review by Pittler et al. (2008) established that hawthorn extract significantly improves exercise tolerance and symptoms in NYHA class II heart failure. The large SPICE trial (Holubarsch et al., 2008, n=2,681) examined hawthorn in class II-III heart failure and found a trend toward reduced sudden cardiac death, though the primary endpoint was not met. Walker et al. (2006) demonstrated modest blood pressure benefits in diabetic patients. The German Commission E has approved hawthorn for stage II heart failure, reflecting its strong European evidence base.