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Treatment for Dark Under Eye Circles 
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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