5. Packaged Fresh Fruit
Fresh strawberries, blueberries or raspberries are fiber- and antioxidant-rich superfoods, but they can also carry a parasite called cyclospora which causes diarrhea, vomiting, bloating, and other nasty flulike symptoms. Wash berries before eating and never consume after the use by date, or after they begin to break down or grow mold. Save yourself money by freezing fresh berries you know you won’t eat in time.