A. Vogel Venaforce contains extract of freshly harvested horse chestnut seeds to help treat the symptoms of varicose veins and leg cramps. Horse chestnut is one of the most popular herbs used to help treat varicose veins. Horse chestnut is the seeds of the horse chestnut tree which are often used medicinally. As with all of A. Vogels products, Venaforce uses only the very best, most natural ingredients that are picked in regions where no artificial pesticides, insecticides or fungicides are used. This is to help ensure that the active ingredients in the horse chestnut that help ease varicose vein symptoms are present in their best form.