Treatment for Dark Under Eye Circles

Grated potatoes can lighten under-eye circles. Potatoes contain an enzyme called catecholase, which is used in cosmetics as a human skin lightener.
Run one spud through your food processor and stuff the raw mash into a piece of cheesecloth. Apply to the area directly beneath your eye — don't let the potato juice come in contact with the eye itself — and leave for 15 to 20 minutes.
Wipe away the starchy residue