Eating out can be tough for the health-conscious consumer these days; restaurant portions are growing seemingly every day and choosing healthy fare can be a struggle. Fish -- low in fat and high in protein -- is usually a good choice for someone watching their waistline or cholesterol levels, but if you're eating out early in the week, you might want to think twice before ordering that broiled salmon or grilled mahi mahi.

Chef Anthony Bourdain, from the Travel Channel, reminds restaurant customers that fresh fish markets are closed over the weekend. So if there's a fish dish on the special board Monday night, and especially if that dish is made with a strong or acidic sauce, chances are you're eating the chef's weekend leftovers. Bourdain is quick to point out that the the three-day-old fish is unlikely to hurt you, but that fish doesn't keep as well as other foods. If you're concerned about getting the freshest fish out there, hitting the seafood restaurant later in the week is probably your best bet.