Yes, there is a possibility that a low level of ferritin could lead to dark circles under the eyes of human beings. If the ferritin inside an indivisual is at low normal level, it will cause all types of symptoms, such as fatigue, dark circles under the eyes, poor concentration, poor growth and development in kids, poor test scores at school, peeling fingernails, poor memory and so on and so forth. Especially women who got a low level of normal iron will loose their hair and have their fingernails peel or not grow. Ferritin is a ubiquitous intracellular protein that stores iron and releases it in a controlled fashion. The protein is produced by almost all living organisms, including bacteria, algae and higher plants, and animals. In humans, it acts as a buffer against iron deficiency and iron overload. Human beings should be getting 20mg of iron from our diet everyday but because most people have stopped eating as much red meat and egg yolks we are seeing more and more people with low iron which includes kids and the elderly and so everyone would do well to take 1 teaspoon of ironsmart which provides 10mg of elemental iron per day. And please rest assure that ironsmart does not constipate. If you take enough ferritin, it will to some extent help reduce the dark eye circles.