Subway is generally safe to eat for most people. The chain follows standard fast food safety protocols, and serious foodborne illness from Subway is rare. That said, a few real concerns are worth knowing about, from sodium levels to deli meat risks for pregnant women to the reality that food safety at any franchise depends heavily on the individual location.
The Deli Meat Risk for Pregnant Women
If you’re pregnant, over 65, or have a weakened immune system, the CDC recommends avoiding deli meat entirely or reheating it to 165°F (steaming hot) before eating. This applies directly to most of Subway’s core menu. The concern is listeria, a bacteria that can survive refrigeration temperatures and occasionally contaminates sliced deli meats. For pregnant women specifically, listeria can cause pregnancy loss, premature birth, or life-threatening infections in newborns.
This isn’t a Subway-specific problem. It applies to all cold deli meats, whether from a sandwich shop or your own fridge. But because Subway’s menu centers on cold-cut subs, it’s worth flagging. If you’re in a high-risk group and still want Subway, you can ask for your sandwich to be toasted until the meat is heated through, or opt for a meatball sub or another hot option.
What’s Actually in the Food
Subway’s ingredients have faced public scrutiny several times over the past decade, and some of the concerns have been legitimate while others haven’t held up.
The tuna controversy is probably the most memorable. A lawsuit filed in 2021 claimed Subway’s tuna contained other fish species, chicken, pork, cattle, or no tuna at all. The case was dismissed with prejudice in 2023, meaning it can’t be filed again. The judge had earlier noted that ingredients like mayonnaise mixed in with tuna were a “fact of life,” not evidence of fraud. Independent lab testing never produced conclusive proof that the tuna wasn’t tuna.
The bread has drawn real questions, though. In 2020, Ireland’s Supreme Court ruled that Subway’s bread didn’t legally qualify as bread under Irish tax law because its sugar content was 10% of the weight of the flour. Irish law caps sugar at 2% of flour weight for something to be classified as bread. This doesn’t mean the bread is dangerous, but it does mean it’s significantly sweeter than what most people picture when they think of sandwich bread. If you’re watching sugar intake, this is worth knowing.
On the additive front, Subway removed azodicarbonamide from its bread back in 2014 after public pressure. This chemical, used as a dough conditioner, is legal in North America but banned in food production across the EU, UK, and Australia. It’s no longer in the recipe.
Sodium Is the Bigger Nutritional Concern
For most healthy adults, the real dietary issue with Subway isn’t contamination or mystery ingredients. It’s sodium. A 6-inch Oven Roasted Turkey sub contains 810 mg of sodium, which is about 35% of the recommended daily limit. A 6-inch Ultimate B.M.T. hits 1,580 mg, roughly two-thirds of what you should consume in an entire day. Go footlong, and you’re potentially over the limit in a single meal.
These numbers are before adding pickles, olives, or extra cheese. If you eat Subway regularly and have high blood pressure or are trying to manage heart health, choosing lower-sodium options and loading up on vegetables instead of processed toppings makes a meaningful difference.
How Much Depends on the Individual Location
Subway has nearly 37,000 locations worldwide, and they’re almost all independently owned franchises. That means food safety practices vary from store to store. Corporate sets the standards: color-coded cutting boards to prevent cross-contamination, glove use during food prep, refrigeration monitoring, first-in-first-out inventory rotation, and regular sanitizing of food contact surfaces.
Whether those standards are followed consistently is another matter. Health inspection reports from individual locations reveal the kinds of violations you’d find at any fast food restaurant. Common issues include vegetables on the prep line not held below the safe temperature of 41°F, food debris buildup on slicing equipment, and employees preparing food without hair restraints. None of these are unique to Subway, but they’re a reminder that the cleanliness of your local store matters more than the brand name above the door.
You can look up health inspection scores for your local Subway through your county or city’s public health department, usually available online. A location with repeated temperature control violations or sanitation issues is a different risk profile than one with a clean record.
How Subway Compares to Other Fast Food
Subway has long marketed itself as a healthier fast food option, and in some ways that’s fair. You can customize your sandwich with a heavy vegetable load, skip cheese and high-calorie sauces, and choose whole wheat bread. The ability to control what goes on your sub gives you more flexibility than a burger chain where the menu items arrive pre-assembled.
But “healthier than a Big Mac” and “healthy” aren’t the same thing. The processed deli meats, high sodium content, and sugar-heavy bread mean that a typical Subway sandwich is still fast food. It’s a reasonable choice when you’re looking for something quick and want more control over your meal. It’s not a substitute for whole, unprocessed foods if you’re eating it daily.
For the average person eating Subway occasionally, the food is safe. The chain operates under the same food safety regulations as every other restaurant in the country, and its ingredients are no more concerning than those at comparable chains. The people who need to take extra precautions are pregnant women, older adults, and anyone with a compromised immune system, all of whom should treat the deli meat question seriously.