Contrary to popular periorbital belief, too many late nights at the office (or too many Margaritas) are not the origin of inky undereyes. The real culprit is blood deposited by round-the-eye capillaries, which turns a bruise-like blue upon oxidization. The brains at Bremenn Research Labs understood this, and developed Hylexin as the first product specifically for serious dark circles. Hylexin both diminishes darkness and lessens the leaking that causes it—so unless looking like you just left a boxing ring is your thing, pick some up pronto.