Carol Ann Rinzler, author of
Nutrition for Dummies, points out that sushi is the very definition of a low-fat meal (as are fresh oysters and clams). But if you're not eating it the right way, it's not low-fat at all.
"To maximize the benefits [of sushi], choose pieces that are rich in omega-3s, the unsaturated fats that protect the heart and boost brain power," Rinzler says. She suggests salmon and tuna, which are both low-calorie (40 calories per ounce for the salmon and 42 for the tuna), high in protein and omega-3s, and also deliver a big dose of vitamin D.