About Arjuna
Ayurvedic cardiac herb. Several small double-blind RCTs (chronic heart failure, stable angina) and a systematic review/meta-analysis in stable angina report improved cardiac function and exercise tolerance, but trials are small, mostly single-center, and heterogeneous. Mechanism (positive inotropy, antioxidant, mild vasodilation) is plausible. Not a substitute for guideline heart-failure therapy.
What Arjuna supports
- Small RCTs suggest support for cardiac function in heart failure and angina, on top of standard therapy
How much Arjuna to take
The RDA prevents deficiency. The effective range is what clinical trials used to actually move the outcome.
Effective
500–1500
mg
Cardiac RCTs used 500 mg every 8h up to 750 mg twice daily of stem-bark extract.
Clinical evidence
Moderate clinical evidence. Several small RCTs plus one meta-analysis in stable angina; limited quality.
NIH Fact Sheet