Inflammation sits at the foundation of almost every disease process, and while some inflammation is a normal, healthy response, chronic low-grade inflammation from everyday food choices adds up over time. Here are eight common foods worth being mindful of, and why each one drives inflammation in the body. (Based on the insights of Dr. Suneel Dhand)
Key Takeaways
- Processed meats, white bread, protein bars, potato chips, and deep-fried foods all drive inflammation through different mechanisms — nitrosamines, blood sugar spikes, oxidized oils, and heavy processing.
- “Zero sugar” claims on protein bars can hide sugar alcohols like sorbitol and mannitol, which still affect blood sugar.
- Alcohol’s inflammatory impact depends heavily on context — metabolic health status and drinking amount both matter significantly.
- Plant-based burgers aren’t automatically anti-inflammatory; many are heavily processed with long ingredient lists.
- Sugar tops the list — a single can of soda contains roughly 9–10 teaspoons, against a bloodstream that normally holds only about one teaspoon at a time.
8. Processed Meats
Hot dogs, deli meats, and similar products are high in nitrates, which can convert into compounds called nitrosamines — toxic to the body, inflammatory, and potentially carcinogenic. The nitrates can trigger an almost immediate inflammatory response in the gut. It’s not just the nitrates, either: these meats are typically cooked at high, dry heat, which produces advanced glycation end products (AGEs) — chemical byproducts of searing and high-temperature cooking that generate free radicals and oxidize the vascular system, adding to the inflammatory load.
7. White Bread
White bread undergoes heavy processing and bleaching. Refined carbohydrates like this spike glucose and insulin levels, and insulin itself is a pro-inflammatory, fat-storage hormone. The processed flour also oxidizes cholesterol into a “stickier” form, contributing to the glucose intolerance picture. Minimally processed alternatives like sourdough, where natural fermentation bacteria help offset the sugar impact, are a meaningfully different product from heavily enriched, bleached white bread.
6. Protein Bars
Many protein bars function as hidden candy bars — heavily processed despite marketing themselves as health food. A “zero grams of sugar” label doesn’t tell the whole story: sugar alcohols like sorbitol and mannitol don’t have to be labeled as sugar but can still spike blood sugar in a similar way. The fiber in many bars also tends to be highly processed industrial fiber, quite different from the fiber found in whole foods like broccoli. A useful marker: minimally processed foods generally don’t have a shelf life stretching well over a year — if a product does, that’s often a sign of significant processing to keep it stable.
5. Potato Chips
Chips are typically deep-fried at high temperatures, often through multiple refrying cycles, using seed oils. This process can produce acrylamide, a compound identified as a potential carcinogen in high quantities. If you’re going to have chips, checking the ingredient list and choosing options cooked in a stable oil like cold-pressed olive oil or avocado oil (rather than oils refined using chemical processes) is a meaningfully different choice than a chip deep-fried in heavily refined oil — and moderation matters more than any single choice.
4. Deep-Fried Foods
Deep frying exposes food to extensive oxidation. Fried chicken from fast food chains, for example, often contains disproportionately more fried breading than actual chicken. The combination of highly oxidized, calorie-dense oil with foods that also spike blood sugar compounds the inflammatory effect — the frying process itself is often a bigger factor than the underlying food being fried.
3. Alcohol
Alcohol is toxic to essentially every cell in the body, disrupts the gut’s natural defensive barrier, and can raise blood pressure, adding shear stress to blood vessel walls. That said, context matters significantly here: for people who are otherwise metabolically healthy and drink in genuine moderation (roughly one drink a day), some research and observational patterns (including from long-lived populations in parts of the Mediterranean) suggest a less clear-cut negative effect, though what’s mixed into the drink matters too, since high-sugar cocktails compound the inflammatory response. For anyone who is already metabolically unhealthy, overweight, or insulin resistant — a category that includes a large share of the population — even modest alcohol intake is more likely to add meaningfully to existing inflammation. Excess or regular heavy drinking builds cumulative inflammatory harm regardless of starting health status.