6 expired pantry items most people keep using that could make you sick

Last week, I discovered a jar of cinnamon in my pantry that had been there since I moved into my apartment. That was four years ago. I’d been sprinkling it on my morning oatmeal without a second thought, until a friend mentioned she’d gotten sick from using expired spices. That got me thinking about all the other potentially questionable items lurking in the depths of my kitchen cabinets.

We’ve all been there, right? You reach for that bag of flour that’s been sitting there for who knows how long, or grab the cooking oil that’s been pushed to the back of the shelf since your last attempt at homemade donuts. Most of us assume if something looks fine and doesn’t smell off, it’s probably safe to use. But here’s the thing: some pantry staples can actually become health hazards long before they show obvious signs of spoilage.

1. Flour that’s been sitting too long

When I started baking during a particularly stressful period a few years back, I went through flour like crazy. These days, not so much. That half-empty bag from my sourdough phase? It’s been there longer than I care to admit.

Here’s what shocked me: flour can actually harbor dangerous bacteria like E. coli, even when it looks perfectly fine. Dr. Amesh Adalja, an infectious disease specialist and senior scholar at the Johns Hopkins Center for Health Security, warns that “It is best to discard the product in order to minimize risk.”

But even without recalls, flour typically only stays fresh for about eight months in your pantry. After that, it can develop a rancid smell from the natural oils breaking down. Whole wheat flour goes bad even faster, usually within three months, because it contains more oils. The scary part? You might not notice the change in taste until after you’ve already eaten that batch of cookies.

2. Spices and dried herbs

Remember that cinnamon I mentioned? Turns out I’m not alone in hoarding ancient spices. Most of us have a collection of dried herbs and spices that predate our last three apartments. While they won’t necessarily make you sick in the traditional food poisoning sense, expired spices can lose their potency and develop off flavors that might upset your stomach.

Ground spices generally stay good for two to three years, while whole spices can last up to four. But here’s the kicker: once they lose their potency, you might be tempted to use more to get the same flavor, which can lead to digestive issues, especially with stronger spices like cayenne or black pepper.

I’ve started writing the purchase date on my spice jars with a permanent marker. Game changer.

3. Cooking oils

This one surprised me the most. That bottle of olive oil I bought in bulk to save money? It might be doing more harm than good if it’s been sitting around too long. Oils can go rancid, and consuming rancid oil regularly has been linked to increased inflammation and other health issues.

Most cooking oils last about two years unopened, but once you crack that seal, you’re looking at six months to a year, depending on the type. The tricky part is that rancid oil doesn’t always smell terrible right away. It might just taste a bit off, or have a slightly sticky residue around the bottle neck.

Light, heat, and air are oil’s worst enemies. I learned this the hard way when I kept my olive oil right next to the stove for convenience. Now it lives in a cool, dark cabinet, and I buy smaller bottles that I’ll actually use up within a few months.

4. Nuts and seeds

Have you ever grabbed a handful of walnuts from that bag you opened months ago, only to get a bitter, unpleasant taste? That’s rancidity at work, and it’s more than just unappetizing.

Dr. Robert Gravani, a professor of food science at Cornell University, advises: “If grains or nuts look moldy, discolored or shriveled, or if they have an unusual smell, it’s best to err on the side of caution and throw them out.”

Nuts contain oils that can go rancid pretty quickly, especially when stored at room temperature. Pine nuts are particularly notorious for this, often going bad within a month or two. Consuming rancid nuts won’t land you in the emergency room, but they can cause digestive discomfort and have been linked to increased free radicals in your body.

The solution? Store nuts in the fridge or freezer. They’ll last months longer, and you won’t risk that awful bitter taste ruining your salad or baked goods.

5. Canned goods past their prime

Canned foods seem like they should last forever, right? While they do have a longer shelf life than most pantry items, they’re not immortal. Most canned goods are best within two to five years, but high-acid foods like tomatoes and fruit should be used within 12 to 18 months.

The real danger comes when cans are damaged. Dents, rust, or bulging can indicate bacterial growth, including the potentially deadly botulism. I once found a can of beans in the back of my pantry that was slightly swollen. Into the trash it went, no questions asked.

Even if the can looks fine, expired canned goods can lose nutritional value and develop an off taste that might upset your stomach. Plus, the lining of older cans might start breaking down, potentially leaching chemicals into your food.

6. Potatoes and onions

Okay, technically these might not live in your pantry, but many of us store them in similar conditions. WebMD warns that “If your pantry is too hot, or if you store potatoes for a long time, they will grow sprouts and might rot.”

Green potatoes or those with significant sprouting contain higher levels of solanine, a toxic compound that can cause nausea, headaches, and digestive issues. While you’d need to eat quite a bit to get seriously ill, why risk it?

Onions that have gone soft or developed dark spots can harbor harmful bacteria. I learned this after using a questionable onion in a stir-fry and spending the next day feeling pretty rough.

Final thoughts

Cleaning out my pantry has become part of my Sunday evening routine, right alongside my weekly life admin session. It takes maybe ten minutes to check dates, toss anything questionable, and make a note of what needs replacing.

The truth is, most of us are walking around with potential stomach upset sitting right in our kitchens. While not everything past its prime will make you seriously ill, why take the chance? Your digestive system will thank you for the spring cleaning, and you might even find yourself cooking more when you know everything in your pantry is fresh and safe to use.