The bark, seeds, leaves, flowers and chestnuts of the horse chestnut have been used for a very long time for medicinal preparations. This tree native to the Balkans and West Asia is used mainly to treat the symptoms of circulatory insufficiency of the legs. This health problem corresponds to poor circulation of blood in the veins. Blood pumped by the heart struggles returning from the bottom to the top of the body through the venous system. The legs become swollen and painful due to the accumulation of blood.

The signs of fatigue on the face also correspond to poor circulation. Indeed, the circulatory drainage is at its maximum during the night. Therefore, in the event of lack of sleep, it is less effective. When the blood circulates less well, bags and / or dark circles can form. Because of the accumulation of blood, the vessels are said to be congested. Blood pigments stagnate, giving the bluish to purplish colour to dark circles.

It is also because the skin around the eye is the thinnest in the human body that the signs of fatigue are more visible. Escin, a molecule found in the horse chestnut seed, has veinotonic properties. This means that it preserves the permeability and the tone of the wall of the blood vessels (Domanski and al. 2016). In the case of heavy legs as in that of signs of fatigue, horse chestnut extract decongests the vessels to improve microcirculation and reduce dark circles. This ingredient is compound in our eye contour care.