Why It Makes You Pretty: In addition to offering a good, low-fat source of protein (key for healthy hair growth), shellfish contains high amounts of zinc, a mineral which may help prevent acne and boost your immune function, says N.Y.C. nutritionist Keri Glassman, author of The O2 Diet. Shellfish also has pantothenic acid, a B vitamin that makes hair look shinier.

Also Try: Oysters, clams and mussels