Unless you’re a plastic surgery aficionado, or you religiously follow Chrissy Teigen’s Instagram, you may have never heard of buccal fat removal. The procedure — which involves removing fat from the cheeks to create a more contoured face — is less popular than breast augmentation, face lifts and fillers, but it’s still highly requested by patients, including Teigen.

PEOPLE spoke with New York City-based plastic surgeon Dr. Steven M. Levine, whose subtle improvements grace some of the most famous faces and figures in the world, about the procedure. (He is not Teigen’s surgeon.)

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