Patanjali arjun amla juice is a combination of arjun bark extract and amla juice. It is a natural source of vitamin C. Arjun is the best herb for heart disease. It prevents and helps in the recovery of angina and heals heart tissues. Patanjali arjun amla juice works by stimulating the heart, treating the various ailments due to the presence of hydrolysable tannins and vitamin C constituents.