Lamberts Horse Chestnut Complex is a unique formula that combines 4 herbs in just one tablet. Horse Chestnut (Aesculus hippocastanum) Seed is included at 300mg in this formula. It has a long history of use in traditional herbal medicine and is widely recommended by practitioners today. Butcher's Broom (Ruscus aculeatus) is a native Mediterranean plant that is well regarded as a suitable partner to horse chestnut seed and we have added a relevant level of 112mg. Extracts of the seeds of European grapes contain one of the richest sources of anthocyanidins, from the bioflavonoid family, and we have incorporated grape seed extract in our product. Anthocyanidins have been identified as being particularly active in supporting and repairing collagen rich structures in the body. Collagen is manufactured in the body and has many roles including being a structural part of capillaries, veins and arteries. When collagen becomes weakened, this can give rise to health problems associated with damage to blood vessel walls. Like anthocyanidins, rutin is one of the most well-known bioflavonoids and this has also been included in Lamberts Horse Chestnut Complex.