The “gluten-free” label is perceived as a guarantee of complete safety. It creates the impression that this is a binary state: either gluten is present or it is not. In practice, things are much more complicated. This label does not mean the absolute absence of gluten, but rather compliance with certain standards that vary depending on the country, production technologies, and control methods.
What “gluten-free” really means
The basic international benchmark is no more than 20 ppm (mg per kg of product). This is a compromise between production capabilities and safety for most people with gluten sensitivity.
It is impossible to completely eliminate gluten due to the peculiarities of agriculture and logistics. Even if a product initially does not contain gluten, it may come into contact with it during cultivation, storage, or processing.
Different countries – different requirements
The same threshold of 20 ppm does not mean the same level of control. Approaches vary significantly:
- In the USA, only the final product is tested (the absence of gluten in the tested sample does not mean it is also absent in other samples from the same batch), and the responsibility lies with the manufacturer;
- In Canada, the composition of raw materials is controlled, and the use of gluten-containing components is prohibited;
- In the EU, a traceability system is in place, and categories of “gluten-free” and “very low gluten content” are defined;
- In Russia, requirements are distributed across different regulations, and there is no single standard;
- In Asian countries, the level of control varies widely—from strict to formal.
As a result, the same label on the packaging can indicate a completely different level of risk.
Labeling is not certification
In many countries, there is no mandatory “gluten-free” certification. The manufacturer claims compliance with the requirements and bears legal responsibility.
Control often occurs after the product has entered the market—through inspections or complaints. This means that some products may not comply with the declaration until a violation is identified.
Cross-contamination
Even if a recipe does not contain gluten, it can enter the product through production. This is called cross-contamination:
- using the same equipment for different products;
- flour residues in the air and ventilation;
- shared storage and transportation;
- staff contact with gluten-containing products.
Flour particles can remain in the air and settle on equipment, so even thorough cleaning does not always guarantee the absence of contamination.
Problematic product categories. Some products have an increased risk of gluten content even when labeled:
- oats—often contaminated during harvesting and storage;
- fermented products—gluten may be partially broken down but does not disappear completely;
- sauces, beverages, and starters—complex technological processes increase the risk of errors.
Limitations of laboratory tests
The main analysis method—ELISA—looks for whole protein structures. During fermentation, gluten is broken down into fragments that the test may not detect.
However, the human immune system can react even to these fragments. As a result, a product may pass the test as “clean” but still cause a reaction.
Why the label can be misleading
The situation is complicated by the fact that:
- some manufacturers use a common conveyor and perform minimal control;
- others implement strict protocols but still indicate “traces” due to legal risks;
- testing methods have limitations;
- legislation is not unified.
As a result, a product labeled “may contain traces” can sometimes be safer than one labeled “gluten-free.”
Why your reaction to a product cannot be reduced to one line on the package
Even careful labeling does not fully predict how a specific product will be tolerated by a specific person. What matters is not only the ppm threshold and not only the legal claim, but also the product category, the degree of processing, the serving size, the risk of cross-contact in manufacturing, and the individual sensitivity of the person eating it. A cracker, sauce, fermented drink, oat product, and ready-made dessert with a long ingredient list are technologically very different foods, even if they all carry the same label.
In addition, a reaction after a product labeled gluten-free is not always caused by gluten itself. In some people symptoms may be related to milk proteins, gums, fibers, sugar alcohols, a high load of fermentable carbohydrates, heavy fat intake, histamine, or other components of a complex formula. This does not make gluten irrelevant, but it helps avoid reducing every problem to a single phrase on the package or drawing firm conclusions from one episode.
In practice it is more useful to look for repeatability: which exact product caused symptoms, in what portion, from which manufacturer, and whether it was oats, a fermented sauce, a baked good with a long formula, or a relatively simple whole-food item. That approach usually gives more useful information than blind faith in the label or a total rejection of the label altogether.
How to enhance the safety of your choices
The “gluten-free” label is not an absolute guarantee but a result of compliance with certain conditions and probabilities. Behind it lies a complex control system with weak points. Understanding these nuances allows for a more informed approach to product selection.
If you have celiac disease or it is vital for you to buy gluten-free products, then you should:
- pay attention to voluntary certifications—often certification marks from celiac disease societies are much more accurate than regular “gluten-free” labeling;
- avoid highly processed and fermented products;
- be cautious with oats without special labeling;
- evaluate the manufacturer and its technological level.
Sources
- Questions and Answers on the Gluten-Free Food Labeling Final Rule: U.S. Food and Drug Administration
- Gluten and Food Labeling: U.S. Food and Drug Administration
- Standard for Foods for Special Dietary Use for Persons Intolerant to Gluten (CODEX STAN 118-1979)
- Eating, Diet, & Nutrition for Celiac Disease: National Institute of Diabetes and Digestive and Kidney Diseases
