Hawthorn Berry is a heart tonic, or troporestorative. Hawthorn helps the heart to become healthy and stay healthy. The benefits are sustained once it has done its work. It strengthens the heart's muscles, and the smooth muscles of veins and arteries to improve their function. This plant is also a traditional folk medicine for the broken hearted.
An article on the health benefits and research on Hawthorn Berry can be found here.