standardised to contain 20% aescin, the important \'actives\',purest grade extracts in a one-a-day tablet, concentrated extracts of horse chestnut, butchers broom and rutin,designed to be gentle on the tummynature\'s best\'s horse chestnut complex contains a concentrated extract derived from the seed of the horse chestnut tree, one of the most common single herb products sold in germany. each tablet is standardised to contain 20% aescin, which is believed to be one of the most important, active compounds in horse chestnut referred to as saponins. to this we have added concentrated extracts of no less than three other well known herbs; butcher\'s broom, (a shrubby, spiky leaved plant, native to the uk), rutin, a bioflavonoid with important properties and the precious compounds found in grapeseed. this one-a-day formula is not only convenient but also designed to be gentle on the tummy.