Yes, malnutrition can cause dark circles under eyes because endocrine dyscrasia caused by malnutrition is a factor of the formation of dark circle. Without enough nutrition in the liver and kidney, the blood is not sufficient, then the metabolization of ocular blood slows down and the sedimentation of blood gives rise to the dark circle. You should balance your diets in case of malnutrition and eat more fruits with plentiful vitamin C. Also, you need to do appropriate amount of aerobic exercises to improve cardiopulmonary function, promoting the blood circulation, which has an effect of reducing the formation of dark circle. In addition, you can apply cold and hot compress onto your eyes together with eye massage to help you get rid of dark circles.
Dark circles under eyes can be caused by many diffierent fators. Malnutrition is one of them. The lack of nutrients ( e.g. iron, Vit K)in the diet, or the lack of a balance diet, can contribute to the discoloration of the area under the eyes.Meanwhile malnutrition will affect your body health , for example, your blood perssure may lower than others. The otherl reasons that cause dark circles under eyes are eye dry and eye strain, cold or sinus Infection,extreme stress and depression, and so on.But the top one is Nasal congestion. There are several ways which can get rid of dark eye circles: Vitamins can help reduce dark circles under eye, eye creams are available to help you get rid of dark circles under eye. Here is a blog link that can help you.