2. Hawthorn will restore and stimulate your heart and arterial circulation. It will also help to regulate and balance your entire cardiovascular system and promote good cholesterol levels by relaxing your blood vessels and increasing your heart’s metabolism, which will improve the blood supply to the heart. Furthermore, Hawthorn can be used to treat heart disease and its various symptoms, mild heart-muscle weakness, angina and arrhythmia. This is why a lot of herbalists call this the “world’s best cardiac tonic.”