nature’s best horse chestnut complex is a unique ‘4 in 1’ formula that combines four herbs traditionally used by medical herbalists for hundreds of years.aescin is the main ‘active’ compound in horse chestnut seed extract and we use a full 50mg aescin in each tablet which at 2 tablets daily is the level used in studies.butcher's broom is a shrubby spiky leaved plant native to the uk and regarded as the perfect partner to horse chestnut. acres and acres of horse chestnut trees have been planted in the uk and europe to supply the demand for 'conkers' by herbal product manufacturers.for more information on these fascinating herbs please search online.highest strength horse chestnut formulabased on scientific studiesone of the best value horse chestnut supplementsfor potency and puritymoney back guaranteefull refund if not entirely happy