4. Subway’s Tuna Sandwich
Subway’s tuna sub has been in the spotlight for all the wrong reasons. Several lawsuits and independent tests have questioned whether it contains any actual tuna DNA at all. While Subway insists it’s real, the reality is that the texture is closer to a paste than flaked fish, and the strong mayonnaise flavor completely overpowers any natural taste it might have. Some employees claim it’s made in massive batches that sit for hours—or days—in the prep fridge. Plus, the smell is off-putting, especially if you’re trying to eat in the restaurant. If you’re looking for a lean, protein-packed sandwich, the tuna isn’t it. It’s one of the least trustworthy options on a menu already criticized for inconsistent quality.