"May Contain": What Allergen Warnings Actually Tell You (and What They Don't)

You've seen the fine print a thousand times. "May contain peanuts." "Processed in a facility that also handles milk." "Made on shared equipment with wheat." If you're managing an allergy, these lines decide what enters your house. So here's the part almost nobody knows: they're voluntary.

The rules vs. the fine print

US law is strict about one thing: if a major allergen is an ingredient, it must be declared. That's mandatory, and it's the part of the label you can trust completely.

Precautionary statements are a different animal. "May contain" warnings aren't required by law, aren't standardized, and aren't tied to any measured contamination threshold. One company slaps warnings on everything to cover its legal bases. Another runs a genuinely shared line and says nothing, because it doesn't have to. The absence of a warning is not evidence of a clean facility, and the presence of one is not evidence of actual contamination. It's noise wearing a suit.

Cross-contact, the real issue

The underlying concern is cross-contact: allergen residue traveling via shared equipment, shared air handling, or shared hands. For highly sensitive individuals, trace exposure matters, which is why serious allergy families end up researching not just recipes but factories. It is also why celiac and wheat allergy are not the same question even when the answer is the same aisle. That's an absurd burden to place on a shopper, and yet it's the status quo.

How to read the situation

A practical hierarchy. Best: products made in dedicated allergen-free facilities, where the allergens never enter the building. Next: manufacturers with robust allergen controls, segregated lines, and validated cleaning, ideally ones who'll answer questions when you email them (brands that take this seriously respond fast and specifically). Treat "may contain" lines as a signal to investigate, not a verdict, and when the stakes are high, contact the company directly. How they answer tells you plenty.

Our answer to the mess

We formulated CraveMe free from the top 14 allergens because the ingredient side should never be in question, and we obsess over how and where our cookies are made because the label promise has to survive the factory floor. Transparency that stops at the recipe is only half a promise.

Read the label first. Then, if your family's safety depends on it, read the company. The good ones make both easy.