In supermarket aisles, food preservatives are everywhere: deli meats, ready meals, sauces, packaged pastries, drinks… Their promise is simple: to keep products “perfect” for longer.
However, by swallowing them without thinking, one question keeps coming up more strongly: what are their influences, in terms of health risks?
Two major French studies have brought the subject back to the forefront, linking higher consumption of certain additives to an increased risk of cancer and diabetes type 2
Nothing “magical” or spectacular: we are talking about effects that take place over time, in a diet where these substances accumulate, sometimes every day.
And this could directly affect public health, because a small increase in risk on an individual level could easily become a major problem when millions of people are exposed to it daily.
To make this more concrete, we'll follow Lina, 38 years old, two children, demanding job. She cooks when she can, but like many, she alternates between homemade meals and convenient products.
It is precisely in this “everyday mix” that the question of toxicity and the prevention of chronic diseases seems to take on its full meaning!
Food preservatives and health risks: what two French studies say
The studies that are generating buzz are based on large cohorts followed over time, with detailed dietary questionnaires and cross-referencing with medical diagnoses.
These two solid and recent French studies were conducted by researchers from INSERM and were published in the journals BMJ and Nature Communications a few weeks ago.
The idea is not to point the finger at a “guilty” food, but at repeated exposure to certain preservatives, particularly in ultra-processed products.
And that's where it gets tricky: even when eating "more or less correctly", you can accumulate doses through several foods in a single day.
An important detail: these results describe an association, but not an individual inevitability!
But when the same signals keep coming up, conservative after conservative, the question becomes frankly political: do we wait, or do we adjust the recipes and labeling to protect the public health of the French? The next step is precisely to understand who is being targeted…
Nitrites, sulfites, sorbates: why are they everywhere and all the time?
Three families often come up in discussions: nitrites (very present in some cured meats), sulfites (common in products like wine or some dried fruits) and sorbates (used to limit molds and yeasts, in a wide variety of foods).
What is worrying is not just “the E-something name”, it is the role of these molecules in the body and their possible derivatives.
To simplify, some may contribute to biological mechanisms already known in cancers (oxidative stress, inflammation, reactive compounds) or in insulin resistance, which opens the door to diabetes.
Lina, on the other hand, doesn't eat deli meats every day. However, she has some "little habits": a ham and cheese sandwich at lunchtime when she's running, a ready-made sauce in the evening, and a wrapped brioche for afternoon tea.
In this context, it's not just one thing, it's the accumulation!
And that's exactly what researchers are trying to measure: total exposure, not the isolated product.
Cancer and diabetes: how does exposure become established in everyday diet?
The trap is that preservatives are invisible. They don't necessarily change the taste, and they are mostly "diluted" in a food routine where we juggle time, budget and energy.
In Lina's life, everything hinges on busy days. She often tells herself, "It's okay, it's a one-off," except that the "one-off" happens two or three times a week. At this rate, the additives become a permanent fixture.
And this environment matters for chronic illnesses : diabetes and certain cancers don't develop over a weekend. They build up, sometimes silently, over years. Understanding where conservatives hide is already a step towards regaining some control.
The ultra-processed “combo”: when potential toxicity depends on the context
A preservative never acts in a vacuum. It comes into play within a context: a diet richer in salt, added sugars, poor quality fats, and often lower in fiber.
As a result, the metabolic environment deteriorates, and the body manages inflammation and blood sugar less effectively.
This is where we talk about toxicity in a broad sense: not because an ingredient is a poison in itself, but because it contributes to a less favorable biological environment.
And when multiple exposures accumulate, the signals become difficult to ignore!
A simple example: a quick snack (chips + sausage + sugary drink) can tick several boxes at once. This isn't an indictment of snacks, it's just a realistic snapshot of how the food industry makes preservation... very convenient.
The key takeaway: It seems that the problem isn't the amount of alcohol consumed (it can even be good for morale and therefore for health), but rather the frequency of these poisons being taken, which appears to be harmful in the long term…
The idea is therefore to stay informed without stressing, to maintain maximum discipline and to respect it throughout one's life!
