Hawthorn, also known as Crataegus Oxyacantha, is a small tree that reaches 8 meters in height. It has small leaves, white flowers, and in the late summer or early autumn, bright red berries. It is native to the northern hemisphere; thus, it can be found in Europe, Asia, and North America. Hawthorn was traditionally used as a diuretic for kidney and bladder stones, but it later gained popularity in the treatment of heart conditions. Among its main constituents, we find: polyphenols, proanthocyanidins, bioflavonoids, triterpenoid derivatives, coumarins, and amines (only in flowers).