As far as the circulatory system and the heart are concerned, Hawthorn Berries are one of the most valuable tonic curatives. They restore the heart to its proper function in a mild manner and they relax or stimulate the heart, depending on what is needed. In a long-term manner it can be used safely to improve heart efficiency and to combat weakness. It is mostly used to cure hypertension (high blood pressure), angina (heart condition) and arteriosclerosis.