Let’s be real, processed foods are everywhere. Your pantry, your fridge, the gas station snack aisle. They’re convenient, they’re cheap, and sometimes they taste way better than they should. The question is, should we be worried about what’s actually inside these packages? While the FDA assures us that approved additives meet safety standards, research links eating more ultraprocessed foods to a higher risk of dying from any cause and has ties to 32 health conditions, according to a 2024 umbrella review published in The BMJ. That’s a lot more than just empty calories we’re talking about.
Here’s the thing. Not all processed food ingredients carry the same level of risk. Some are relatively benign, while others have been flagged in multiple studies for their potential health effects. The science is evolving fast, especially between 2023 and 2025, and what we once thought was safe is being reexamined. Below, we break down ten common processed food ingredients, ranked from the lowest to the highest risk based on the latest research and regulatory updates.
1. Natural Emulsifiers: Lecithin and Guar Gum
Among the emulsifiers assessed, lecithin has the highest mean exposures at roughly 60 mg per kilogram of body weight daily, and guar gum has been approved for use in food by the FDA, the European Food Safety Authority, and the Joint FAO/WHO Expert Committee on Food Additives, with all three bodies finding no safety concerns when used as intended. Emulsifiers like lecithin and guar gum help blend ingredients that would otherwise separate, like oil and water. Authoritative reviews by the FDA, FAO, WHO and international expert scientific committees have found that emulsifiers remain safe at current consumption levels. Though emerging research links consuming some emulsifiers to gut inflammation, microbiome disruption, and higher cancer and allergy risks, overconsuming them is linked to increased inflammation, gut health issues, and cancer risks. That said, natural emulsifiers like lecithin and guar gum appear to be among the safer additives when used within established limits.
2. Common Preservatives: Sodium Benzoate
Preservatives like sodium benzoate keep food fresh but might be harmful, as some research suggests they could weaken our immune system, and the long-term effects of eating these preservatives are not fully understood. Sodium benzoate is everywhere, from sodas to salad dressings, acting as a shield against mold and bacteria. While it helps extend shelf life and reduce foodborne illness risk, there’s growing unease about what happens when we consume it regularly over years or decades. Artificial colourants, benzoate preservatives, non-caloric sweeteners, emulsifiers and their degradation derivatives have adverse effects by increasing risks of mental health disorders, attention deficit hyperactivity disorder, cardiovascular disease, metabolic syndrome and potential carcinogenic effects. Still, compared to some of the more controversial additives, sodium benzoate sits in a gray zone.
3. Synthetic Food Dyes: Red 40 and Others
California and other states have banned or proposed bans on Red Dye No. 3 and other additives. These synthetic colorants are commonly found in snacks, candy, and drinks, designed to make food look more appealing. Artificial azo dye food colourants and sodium benzoate preservative cause disturbed behaviour in children, according to a systematic review. The FDA still allows their use, yet the mounting evidence is causing states to act independently. These dyes are not nutritionally valuable and serve purely aesthetic purposes, making their risk harder to justify.
4. Carboxymethylcellulose (CMC) and Polysorbate 80
Two food ingredients classified as emulsifiers, carboxymethylcellulose (CMC) and polysorbate 80, received attention recently due to their putative adverse effects on gut microbiota, and food additive emulsifiers have received particular research attention in recent years due to preliminary evidence of adverse gastrointestinal and metabolic health effects. CMC and polysorbate 80 are synthetic emulsifiers frequently used in ice cream, salad dressings, and baked goods. Emerging research links consuming some emulsifiers to gut inflammation, microbiome disruption, and higher cancer and allergy risks. While they’re approved for use, the science is evolving rapidly. Honestly, it’s hard to say for sure what long-term consumption might do, especially when the gut microbiome plays such a crucial role in overall health.
5. Artificial Sweeteners: Saccharin, Aspartame, Sucralose
Recent studies have established an association between artificial sweeteners and cardiovascular risk and diabetes, and importantly, the majority of recent research data, including systematic reviews and meta-analyses, show no link between the use of artificial sweeteners and cancer risk. Artificial sweeteners promise all the sweetness without the calories, making them popular in diet sodas and sugar-free snacks. High consumption has been associated with increased risks of metabolic disorders, cardiovascular diseases, certain cancers, and, somewhat paradoxically, weight gain, adverse pregnancy outcomes, and potential risks for individuals with low seizure thresholds, and studies, including the Women’s Health Initiative, have linked artificially sweetened beverages to an elevated risk of stroke, coronary heart disease, and mortality, independent of established risk factors.
Participants in the middle tier had a 35% faster rate of global cognitive decline, which is about 1.3 years of aging, than people who consumed the lowest amount of these sweeteners, according to a 2025 Brazilian study. Concerns extend to gut health, where artificial sweeteners like saccharin have been linked to inflammatory bowel diseases, gut microbiota disruption, increased intestinal permeability, and dysbiosis, leading to metabolic disturbances such as impaired glucose tolerance, insulin resistance, and heightened systemic inflammation, and these disruptions reduce the production of short-chain fatty acids crucial for insulin sensitivity, further contributing to the development of metabolic disorders like type 2 diabetes mellitus. The idea that something marketed as healthier might actually accelerate aging or mess with your metabolism? That’s concerning.
6. Erythritol and Xylitol: Sugar Alcohols
Studies have shown that both erythritol and xylitol may cause blood platelets to more easily clump, creating clots that can break off and travel to the heart, triggering a heart attack, or to the brain, damaging blood vessels or triggering a stroke. Sugar alcohols are marketed as natural alternatives and show up in sugar-free gum, candy, and keto products. A recent study that came out on erythritol looked at its association with cardiovascular disease, that is death or non-fatal heart attacks or strokes, and found they were increased, and researchers found a possible mechanism for that, linking non-sugar sweeteners to platelet clumping and blood clotting in vitro, which could explain that link, because these can block blood flow and cause heart attacks and strokes. If you’re loading up on sugar-free treats, you might want to think twice.
7. Titanium Dioxide and Other Color Stabilizers
Outdated safety assessments for decades-old additives like brominated vegetable oil and titanium dioxide have become a growing concern. Titanium dioxide is used to make foods whiter and brighter, often found in candies, frosting, and coffee creamers. The European Union banned it in food products in 2022, citing concerns about genotoxicity. The FDA, however, has not followed suit. The FDA has repeatedly failed to act when it comes to reassessing and regulating potentially harmful food ingredients. If Europe says no and the U.S. says maybe, consumers are left in a frustrating limbo.
8. Brominated Vegetable Oil (BVO)
Brominated vegetable oil was approved as “generally recognized as safe” in the 1950s, it was later linked to neurological issues like headaches and memory loss, and by 2024, mounting evidence led the FDA to revoke its approval after FDA banned food additives 2024-2025 rules took effect. BVO was used in citrus-flavored sodas to keep the flavor oils from separating. Key reasons include neurological harm documented in rodent studies from the 1970s, accumulation of bromine in human tissues from prolonged use, and consumer advocacy campaigns highlighting lawsuits against PepsiCo and other brands. Manufacturers have one year to remove BVO from products, with the phaseout completing by August 2025. It took decades for regulators to act, but at least it’s finally being removed.
9. Red Dye No. 3 (Erythrosine)
In 2025, the FDA revoked approval for Red Dye No. 3, a synthetic colorant linked to health risks, and this move came after decades of allowing it in foods like maraschino cherries, though it was banned in cosmetics in 1990. Red Dye No. 3 gives that bright cherry-red color to candies, baked goods, and even some medications. By August 2025, BVO will be phased out completely, and Red Dye No. 3 has also been revoked. The fact that it was deemed unsafe for cosmetics but remained in food for over three decades is baffling. California and other states have pushed for faster action, but the federal government has been slow to respond.
10. Sodium Nitrite in Processed Meats
The majority of studies reported that nitrite-containing processed meat was associated with increased colorectal cancer risk, and this focused perspective based on the current body of evidence links the consumption of meat containing nitrites and colorectal cancer risk. Sodium nitrite is used in bacon, hot dogs, deli meats, and sausages to preserve color, prevent bacterial growth, and enhance flavor. When researchers looked at processed meats which had been treated with sodium nitrite, a preservative which is used to enhance color and prevent food spoiling, they found that this figure jumped from half to 65% of the studies showing evidence of a link with colorectal cancer.
High consumers of food additive nitrites had higher prostate cancer risk, specifically for sodium nitrite, according to a 2022 study published in the International Journal of Epidemiology. When added to processed foods in this way, nitrite can form nitrosamines in the body, which can increase your risk of developing cancer, and sodium nitrite and nitrate in processed meats have been linked to cancer by the World Health Organization, and the International Agency for Research on Cancer has classified processed meat as “probably carcinogenic to humans”. British and Irish sausages are not treated with nitrites, whereas other European and United States sausages like frankfurters, pepperoni and chorizo are, highlighting that not all processed meats carry the same risk. The evidence here is pretty clear, and it’s one of the strongest arguments for reducing processed meat intake.
