Hylexin
Do you know what actually "causes" serious dark circles? I thought I did... but I was wrong. Like most people, I thought dark circles were caused by hard partying, working late, being tired or simple allergies. But according to most research dermatologists, serious dark circles (the kind that make you look old, tired and exhausted) are about, of all things, the oxidation of hemoglobin (blood) in the capillary matrix of the peri-orbital eye area. What a mouthful!
These capillaries actually "leak" blood that begins to oxidize (through a process called hemoglobin degradation)... creating a dark bluish-red pigmentation that looks distinctly like an ugly bruise.
What does all that mean in plain English? Tiny little capillaries deposit blood around your sensitive eye area. The blood turns deep purple and you end up looking like you just went 12 hard rounds in a boxing ring.