Dark circles around the eyes is a multifactorial problem that involves textural changes due to deposition of hemosiderin/bilirubin (breakdown products of red blood cells), sun exposure, dry skin, hyperactive orbicularis oculi muscles, loss of volume along tear trough areas, and/or excess skin laxity. To effectively address the etiologies of your dark circles, you should be evaluated by a board-certified dermatologist or plastic surgeon. There are some creams that can be helpful to minimize hemosiderin deposition, dry skin as well as to reverse prior sun damage. In the hands of an experienced physician injector, hyperactive orbicularis oculi muscles can be treated by botulinum toxin (Botox or Dysport) and loss of volume may be addressed by hyaluronic acid injection (Restylane or Juvederm) along the tear trough areas. Textural changes and mild skin laxity can be improved with Fractional CO2 Laser Resurfacing. However, to flat out state that "Deep Fx can eliminate dark circles" may set you up for an unrealistic expectation unless your eyelids are fully evaluated by a board-certified dermatologist or plastic surgeon.