Hydrolyzed vegetable protein

Cross-reactivity

Case notes

The phrase "hydrolyzed vegetable protein" reads like produce. Nothing in those three words points to soy, which is exactly why it slips past a quick scan of an ingredient panel. On US labels, "vegetable" or "plant" protein is commonly soy, and when it is, the source must be declared — so the useful habit is to keep reading past the ingredient name itself and look for the soy declaration nearby or in the contains statement.

It also travels under several names, and each one hides the connection a little differently. HVP is the same ingredient in abbreviated form, easy to mistake for a processing aid. Hydrolyzed plant protein carries the same vagueness as the original. Hydrolyzed soy protein is the one version that says it plainly, which means a family managing soy may see three different spellings of the same thing across three different packages on the same shelf.

Hydrolyzed vegetable protein sits in the Legumins (11S Globulins) and Vicilins (7S Globulins) families, the seed storage proteins shared across legumes. That matters for households reading labels with peanut in mind as well: soy legumin and vicilin share structural homology with their peanut counterparts, and roughly 5 to 10 percent of people with peanut allergy react to soy. Reactions in these families are generally described as moderate to severe. If you are logging ingredients to look for patterns, recording which alias appeared on which package is more useful than recording "vegetable protein" alone.