Mandelonas

Cross-reactivity

Case notes

The word itself is the disguise here. "Mandelonas" borrows the sound of almond, not peanut, and the product it describes looks the part too — nuts that resemble almonds but are actually peanuts soaked in almond flavoring. The same ingredient may appear under the brand-style name "Nu-Nuts," which gives away even less. Nothing in either spelling signals peanut, so a quick scan of an ingredient panel can pass right over it, and a visual check of a snack mix or bakery topping won't correct the mistake.

Because the peanut proteins involved are storage proteins, the flavoring and soaking don't change what's underneath. Mandelonas sits in both the Legumins (11S globulins) family, which includes Ara h 3, and the Vicilins (7S globulins) family, which includes Ara h 1 — a protein noted for staying stable through processing and persisting even in refined products. Reactions in these families are generally described as moderate to severe, with the vicilin group specifically associated with anaphylaxis, which is why the name matters more than its almond-like appearance.

There's a second layer worth knowing when you're reading labels across a whole cupboard. The peanut and soy storage proteins share enough structural similarity that roughly 5 to 10 percent of people allergic to peanut also react to soy, through the vicilin and legumin families. For families already tracking peanut, that makes it useful to log where names like Mandelonas turn up alongside related entries such as groundnut, arachis oil, or hydrolyzed vegetable protein, rather than treating each unfamiliar word as a one-off puzzle.