Terminalia arjuna (usually simply referred to as arjuna) is a tree bark that is used medicinally in ayurveda for the purposes of cardiovascular health pertaining to the heart itself. It has a large variety of bio actives with the water extract showing promise at improving left ventricle function of the heart without any observable toxicity of side effects when taken at 500mg thrice a day (every 8 hours). There are numerous human studies conducted on arjuna bark although many of them are low in sample size. Nevertheless the water extract appears to be effective in improving cardiac function in persons who have recently undergone cardiac trauma or injury myocardial infarction is the most commonly researched ailment in this regard. Only one study exists on otherwise healthy persons but arjuna showed benefit in improving left ventricle function in an exercise test and the benefits may affect a person regardless of health state.