Does DATEM Cause Cancer? What the Science Says

No study has directly tested whether DATEM, the dough conditioner found in most commercial bread, causes cancer in humans. What does exist is a growing body of research on food emulsifiers as a class, and DATEM’s chemical relatives show up in some of the most-cited findings. A large French cohort study linked higher intakes of mono- and diglycerides of fatty acids, the parent group DATEM belongs to, with modestly elevated cancer rates. But modest statistical associations in observational research are not proof of causation, and the specific mechanisms that might connect DATEM to tumor growth are still being pieced together in animal and lab work.

What DATEM Actually Is

DATEM stands for diacetyl tartaric acid esters of mono- and diglycerides of fatty acids. In European food labeling, it goes by E472e. It is made by reacting mono- and diglycerides (themselves derived from fats) with diacetyl tartaric anhydride. The result is an emulsifier that strengthens gluten networks in dough, giving commercial bread a consistent rise and soft texture. You will find it on ingredient labels for sandwich bread, tortillas, pizza dough, and some pastries.

Regulatory agencies have reviewed DATEM and kept it on the approved list. The European Food Safety Authority re-evaluated the entire E472 family in 2020 and established acceptable daily intakes for the tartaric-acid-containing members (E472d, e, and f) based on a group limit of 240 mg per kilogram of body weight per day, expressed as tartaric acid. For the simpler members of the family (E472a, b, and c), the panel concluded that no numerical limit was even necessary.¹ The U.S. Food and Drug Administration classifies DATEM as generally recognized as safe. So at the regulatory level, DATEM is not flagged as a carcinogen. But “approved” and “proven harmless over a lifetime of exposure” are different claims, and the research landscape has shifted since many of these approvals were first granted.

The Epidemiological Evidence From France

The strongest human data linking DATEM-type emulsifiers to cancer comes from the NutriNet-Santé cohort, a long-running French study that tracks tens of thousands of adults’ diets in unusual detail. Participants logged repeated 24-hour dietary records that were cross-referenced with brand-specific databases listing exact food additives in each product. This level of additive-specific tracking is rare in nutrition research, which is why the study gets so much attention.

In the published results covering over 100,000 participants followed for several years, higher intakes of mono- and diglycerides of fatty acids (E471) were associated with increased overall cancer risk. The combined group of E471 plus its tartaric-acid-ester derivatives, which includes DATEM (E472a, b, c, and e), also showed a statistically significant association with overall cancer, with a hazard ratio of about 1.11 for higher versus lower intake categories.² In a related analysis with slightly different inclusion criteria, E471 specifically was linked to roughly 15 percent higher overall cancer risk, 24 percent higher breast cancer risk, and 46 percent higher prostate cancer risk in higher-intake groups compared to lower ones.³

These numbers sound alarming, but they need context. A hazard ratio of 1.11 or even 1.46 in an observational nutrition study is a small-to-moderate signal. People who eat more of a particular emulsifier also tend to eat more ultra-processed food overall, which brings along extra sugar, refined starch, sodium, and other additives. Disentangling the specific contribution of one emulsifier from everything else in a highly processed diet is extremely difficult. The researchers themselves noted that their findings need replication before public health conclusions can be drawn.²

The Confounding Problem

This is where the evidence gets genuinely murky. People who consume large amounts of food-additive emulsifiers are, by definition, eating a lot of industrially processed food. They may exercise less, smoke more, have lower incomes, or differ in dozens of other ways that independently affect cancer risk. Statistical models try to adjust for these factors, but they cannot adjust for variables they do not measure.

A separate analysis applied a technique for estimating how strong an unmeasured confounder would need to be to fully explain the association between ultra-processed food consumption and health outcomes. The conclusion was sobering: unaccounted-for confounding could plausibly explain the link between ultra-processed food intake and weight gain in adults, and the same logic applies to cancer endpoints.⁴ That does not mean the associations are definitely spurious. It means the observational evidence alone cannot tell us whether DATEM or its parent compounds are genuinely raising cancer risk or are simply tagging along with a dietary pattern that raises risk for other reasons.

How Emulsifiers Could Promote Cancer Through the Gut

While epidemiology points to a possible association, animal and lab research has been tracing a plausible biological pathway. The story centers on the gut’s protective mucus layer and the microbial community living alongside it.

Your intestinal lining is coated with a layer of mucus that keeps bacteria at a safe distance from the cells underneath. Several emulsifiers have been shown to alter the physical structure of this mucus. In one experiment using pig intestinal mucus, exposure to common emulsifiers changed the mesh-like network of the mucus, compacting pores or clumping fibers together depending on the emulsifier.⁵ If the mucus barrier thins or becomes more permeable, bacteria can encroach closer to the intestinal wall. That encroachment triggers low-grade inflammation.

In mice genetically predisposed to intestinal tumors, this chain of events led to something more serious. Researchers found that emulsifier-driven changes to the gut microbiome were both necessary and sufficient to alter the signaling pathways that control cell growth and programmed cell death in the colon, the very pathways that go wrong in cancer.⁶ A follow-up study in tumor-prone mice reinforced the hypothesis, concluding that emulsifier consumption could be a modifiable risk factor for colorectal cancer and that disrupted microbiota-host interactions can favor gut carcinogenesis in genetically susceptible individuals.⁷

This is a coherent biological story: emulsifier disrupts mucus, bacteria get closer to the gut wall, chronic inflammation develops, and in genetically vulnerable tissue, tumors follow. But coherent is not the same as proven. These are animal models with genetic predispositions that most humans do not share, using emulsifier doses that may not reflect typical human exposure. The pathway is plausible, not confirmed in people.

What Human Feeding Trials Have Shown

A handful of controlled feeding studies in humans offer some real-world support for the early steps in that chain, even if they stop well short of cancer as an endpoint.

In a randomized controlled trial, healthy volunteers consumed diets supplemented with carboxymethylcellulose (CMC), a common emulsifier found in ice cream and sauces. Compared to the control group, CMC consumers showed reduced gut microbial diversity, lower levels of short-chain fatty acids (which are generally protective for gut health), and shifts in the metabolites present in stool. Two participants on CMC showed bacteria encroaching into the normally sterile inner mucus layer, a hallmark of gut inflammation.⁸

Another trial in 22 healthy adults compared a high-emulsifier diet to a low-emulsifier diet over controlled periods. In an unstressed state, the intestinal permeability measurements were actually slightly better on the high-emulsifier diet. But when participants were given an injection of a stress hormone, those on the high-emulsifier diet saw their intestinal permeability jump by about 89 percent, while those on the low-emulsifier diet saw their permeability decrease by about 39 percent.⁹ In other words, the high-emulsifier diet seemed to make the gut lining more vulnerable when the body was under stress. That finding is noteworthy because psychological and physiological stress is a normal part of life, not an edge case.

Neither of these trials studied DATEM specifically. They studied CMC and mixed emulsifier loads. But they demonstrate that the first dominos in the proposed mechanism, reduced microbial diversity, bacterial encroachment, and increased permeability under stress, can fall in actual humans eating emulsifiers at dietary levels.

Not All Emulsifiers Behave the Same Way

One of the most important findings in this field is that lumping all emulsifiers together is misleading. Different emulsifiers interact with the gut in very different ways, and some appear to be far more disruptive than others.

In a mouse study comparing several common emulsifiers, lecithin, sucrose fatty acid esters, and CMC did not thin the mucus layer or allow bacteria to encroach on intestinal cells. The researchers concluded that these hydrophilic emulsifiers did not disrupt the mucus-bacterial interface and did not promote gut inflammation.¹⁰ Meanwhile, polysorbate-80 (Tween 80) and carrageenan have consistently shown more aggressive effects. In lab tests using intestinal cell layers, polysorbate-80 at low concentrations reduced the integrity of the cell barrier by about 20 percent and roughly doubled the passage of certain proteins across the barrier, while lecithin did not.¹¹ Carrageenan has been shown to disrupt the junctions between intestinal cells, predisposing the gut to increased permeability and activating inflammatory pathways.¹²

Where does DATEM fall on this spectrum? Honestly, the data is thin. DATEM has not been the focus of many mechanistic studies. It gets swept into the E471/E472 group in epidemiological analyses, and most of the controlled gut experiments use polysorbate-80, CMC, or carrageenan as test compounds because those were the first emulsifiers flagged as potentially problematic. The fact that lecithin and sucrose esters appear relatively benign while polysorbate-80 and carrageenan appear more harmful suggests that chemical structure matters a great deal. DATEM is chemically distinct from all of these, and extrapolating from one emulsifier to another is unreliable.

Process Contaminants as a Separate Concern

There is another angle to the safety question that has nothing to do with the emulsifier molecule itself. DATEM and other mono- and diglyceride-based emulsifiers are manufactured from refined vegetable oils, and those oils can carry process contaminants formed during refining. Specifically, monochloropropanediol fatty acid esters and glycidyl esters (often abbreviated as MCPDEs and GEs) are known to form when vegetable oils are heated to high temperatures during processing. Because emulsifiers are derived from these oils, the contaminants can carry over into the final product.¹³

This matters because glycidol, the compound released when glycidyl esters are digested, is classified as a probable human carcinogen by the International Agency for Research on Cancer. So even if the DATEM molecule itself turns out to be harmless, the manufacturing process could introduce trace amounts of a compound with established genotoxic properties. Regulatory agencies have been tightening limits on these contaminants in refined oils, but the levels in finished emulsifier products are still being characterized. This is a quality-control and manufacturing issue rather than a fundamental problem with DATEM’s chemistry, but it is worth knowing about if you are trying to assess the full risk picture.

Why the Research Gap Exists

If you are frustrated by the lack of a clear answer, the reason is partly structural. Food additives approved decades ago were evaluated under older safety frameworks that focused on acute toxicity and obvious organ damage in animal studies. Subtle effects on the gut microbiome, chronic low-grade inflammation, and long-term cancer risk were simply not part of the testing protocol. Re-evaluating thousands of approved additives under modern standards is slow and expensive, and there is no commercial incentive for manufacturers to fund studies that might raise questions about their products.

The NutriNet-Santé cohort is nearly unique in its ability to track individual additive exposure, and even that study cannot separate DATEM from its chemical siblings. Running a randomized trial where you feed one group DATEM-enriched bread for years and watch for cancer is ethically and logistically impossible. So researchers are left building a case from observational data, animal models, and short-term human feeding studies, none of which alone can answer the question definitively.

Practical Choices in the Meantime

If you eat commercial bread a few times a week, you are consuming DATEM regularly. If you eat a lot of packaged baked goods, tortillas, and convenience foods, your cumulative emulsifier load, across DATEM and several other additives, is higher. The current evidence does not justify panic about any single emulsifier, but it does suggest that a diet heavy in industrially processed food delivers a cocktail of emulsifiers whose combined effects on gut health are not fully understood.

Reducing your intake does not require avoiding bread entirely. Many artisan and bakery-style breads use only flour, water, salt, and yeast. Some grocery-store brands have moved toward simpler ingredient lists in response to consumer demand. Reading ingredient labels is the most direct way to gauge your exposure: DATEM will be listed by name, and other emulsifiers in the E471/E472 family will appear as “mono- and diglycerides” or by their E-number.

Emerging Alternatives in Food Manufacturing

The food industry has been exploring ways to achieve the same dough-conditioning and emulsifying effects without synthetic additives. Enzyme-based approaches, particularly lipases that modify fats directly in the dough during baking, have shown promise. In some formulations, lipase treatment matched or exceeded the performance of traditional emulsifiers, especially in recipes that do not already contain natural emulsifiers like eggs. The enzymes work by generating surface-active lipid fragments in situ, mimicking what a chemical emulsifier does but without leaving a synthetic additive in the final product.

These “clean label” solutions are not yet universal. They require reformulation, and performance varies depending on the specific product. But they represent a path toward reducing the population’s cumulative emulsifier exposure without sacrificing the texture consumers expect. Whether that reduction would translate into measurable health benefits remains an open question, one that probably cannot be answered until the baseline risk from emulsifiers themselves is better quantified.