Pea allergy

By Symon, Every Label · June 30, 2026

Pea allergy is an immune reaction to the proteins in the pea, Pisum sativum, the legume eaten as a garden or green pea, and it is rising fast for a reason most families never see coming: pea protein has become the protein the plant-based boom runs on. In plain terms: your child’s immune system reads certain pea proteins as a threat, and the most serious form can run from hives to a whole-body allergic reaction that affects breathing and blood pressure, called anaphylaxis. Two things make pea different from the allergens US families hear about most. First, pea is not one of the major allergens US or European law requires a label to flag, so it can hide in plain sight, above all as “pea protein” in plant-based meat, plant milks, protein powders, and protein bars, with no warning. Second, pea belongs to a small cluster of legumes (chickpea and lentil) that genuinely tend to travel together, so a pea diagnosis is one of the few legume allergies where the related foods really do need checking rather than assuming.

If your child was just diagnosed, read this first.

This page is long on purpose. It is also the page you will come back to for years. You do not need all of it today. This week, this is what matters:

• Carry the epinephrine auto-injectors your allergist prescribes everywhere your child goes, and learn the few signs that mean use one now. That is the section to read tonight (Emergency preparedness, below). If you do not have the prescription yet, that is the first call to your allergist or pediatrician.
• Read the full ingredient list, every time, not just the bold “contains” line. Pea is not a US or EU major allergen, so the label may never flag it. The word to learn is pea protein, and the place to slow down is the plant-based and high-protein aisle (Reading labels, and Hidden sources, below).
• Watch the plant-based aisle especially. Pea protein is sold as a soy-free, dairy-free protein, so the shelf a family is often sent to in order to get away from soy or dairy is the shelf where pea is most concentrated (Hidden sources, below).
• Chickpea and lentil need checking, not assuming. Pea, chickpea, and lentil genuinely tend to go together, so treat chickpea and lentil as a question to test with your allergist, not a list to either eat or avoid blindly (Cross-reactivity, below).
• Cooking does not make pea safe. Pea’s main protein survives heat, so cooked split-pea soup, baked pea-flour products, and cooked plant-based patties still carry it. This is the opposite of the intuition some families have (Hidden sources, below).
• You do not have to understand the protein science to keep your child safe. The component and the test name are for unhurried conversations with your allergist.

Everything else here is waiting for you, in roughly the order the questions tend to come up. Read it when you want it.

Where a fact below is clinical, it carries its source. None of it is a substitute for your allergist.

What pea allergy is, and who has it

Pea allergy is an immediate, antibody-driven food allergy: when your child eats pea, an antibody called IgE, sitting on their immune cells, latches onto the pea proteins and triggers a release of histamine and other chemicals within minutes. That release is the reaction, and it can run from hives to a whole-body allergic reaction. That is the entity the emergency sections of this page protect against, and it is treated epinephrine-first.

How common pea allergy is depends heavily on where a child lives and what they eat, more than for most allergens, so this page leads with the pattern rather than a single number. In the US and Northern Europe, pea is a less commonly reported primary food allergen than peanut or soy. Across the Mediterranean and the Indian subcontinent, pea is clinically more prominent as part of the broader legume-allergy burden, because legumes are an early, heavy part of the diet there. And in every region the clinical picture is rising, because pea protein isolate is being added to a fast-growing wave of plant-based products, which brings new exposure to children and to adults who adopt plant-based diets. No specific pea prevalence percentage is groundable at the quality floor, so none is published here; the regional and rising pattern is the honest statement. Onset spans childhood, often alongside other legume sensitization, into adulthood with newer pea-protein exposure.

One fact belongs up front because it shapes everything practical below: pea’s main allergenic protein is heat-stable and digestion-stable. Cooking does not reliably reduce it, so cooked split-pea soup, a baked pea-flour good, and a cooked plant-based patty still carry the allergen. Diagnosis combines your child’s history with testing, and the next section is the testing that sorts out how serious the allergy tends to be.

The components that drive severity

Pea is not one thing to the immune system. It is a set of proteins, and one of them does most of the work. For pea there is no long, well-mapped protein taxonomy the way there is for peanut, and that itself is worth knowing, because it shapes what your allergist can and cannot tell you from a test.

A standard pea test (the skin prick, or the basic blood test) only tells you the immune system has noticed pea at all, and for pea it over-calls, because pea shares cross-reactive proteins with other legumes that light up the test without always meaning a real reaction. A more detailed test, component testing, can look at the single best-characterized pea protein, the one your allergist calls Pis s 1. It is the heat-stable, digestion-stable storage protein associated with the more serious, whole-body kind of reaction, which is why cooking does not defuse pea and why a concentrated form like pea protein isolate is a real exposure. The honest limitation: pea component testing is far less developed and less widely available than peanut component testing, so in many places it is simply not on the menu, and even where it is, there is no agreed-upon number that draws a clean line between allergic and tolerant.

So the high-value move is simple: ask your allergist whether pea component testing (Pis s 1) is available and would help in your child’s case, and ask how they read the result against your child’s history. There is no magic number to decode here, and that is not a gap in this page; it is the state of the science. The protein detail is below, written so the words on your child’s lab report mean something when you want them to.

Cross-reactivity, real and cautionary

Pea is a legume where the cross-reactivity story leads with a genuine caution, and that is the honest shape of its cleared floor. Unlike peanut, where a positive legume panel is usually more frightening than the diet needs to be, pea sits inside a small group of legumes that really do tend to go together. So the lead here is the part that changes the plate, and the reassuring part, which is real but narrow, comes after and stays carefully bounded.

Chickpea and lentil travel with pea more than most legumes do. Pea, chickpea, and lentil are the one legume cluster where cross-reactivity is genuinely clinical, not just a blood-test overlap: a substantial share of children allergic to one of the three react to another on a supervised challenge, and the three are repeatedly the most cross-reactive legume group in the studies that challenged children rather than just testing them. The practical point is the opposite of the reassurance peanut families get: a pea-allergic child genuinely warrants testing for chickpea and lentil, and those two should not be assumed safe on the strength of “most legume cross-reactions are not real.” Which of them is actually off the plate is decided by your allergist with history and testing, not assumed, but the starting posture is to check rather than wave them through.

Pea and peanut is a question for your allergist, not a reassurance. Pea and peanut are both legumes, and you will see them grouped together, but this page deliberately does not tell you a pea allergy usually means peanut is fine, because for pea that reassurance does not hold up: a meaningful share of pea-allergic people also react to peanut. Whether your child reacts to peanut is a real cross-reactivity question with its own answer for your child, decided by history and testing with your allergist, not assumed in either direction from the fact that both are legumes. If your child is pea-allergic and peanut has not been sorted out, that is a conversation to have, and the cross-reactivity spoke covers the direction and the why.

The other, unrelated legumes are a different question, and here the reassurance applies, held carefully. A pea allergy does not automatically mean every legume is off the plate. For legumes outside the cluster and outside peanut, the usual legume picture tends to hold: a positive panel reflects cross-sensitization on testing far more often than a real reaction at the table, so blanket avoidance of every legume is usually unwarranted. The literature suggests that having one legume allergy does not mean a child must avoid all legumes, and that the cross-sensitization a panel shows is often not clinically relevant; confirm with your allergist before introducing any of them. The reason this is held carefully and not turned into a green light is the two points above: it does not extend to chickpea and lentil, where the cluster cross-reactivity is genuine, and it does not extend to peanut, which is its own unresolved question for a pea-allergic child. Which legumes come back is a starting question for your allergist, bean by bean, not a verdict from the panel.

Lupin is a caution worth naming. Lupin is another legume, increasingly hidden as “lupin flour” in European and gluten-free baked goods, and it is one of the legumes most likely to cause a genuine reaction in a legume-allergic child rather than just a positive test. A pea-allergic child should not be assumed to tolerate lupin; if your family encounters lupin flour, treat it as a question for your allergist, not a safe default, because lupin can cause severe reactions and hides in baked goods.

The rates, the protein mechanism behind the cluster, the pea-peanut direction, and the full legume-by-legume picture live on the deep pages, not here: see the legume cross-reactivity page and the seed-storage-protein syndrome page. This section gives you the shape; those give you the why.

Hidden sources

Pea is one of the harder allergens to spot on a label, for two reasons this page returns to below: in the US and the EU, the label is not required to flag it at all, and pea protein is multiplying through the part of the store that is growing fastest. These are worth a one-time read now; after that you will spot them on your own. The full scan, every name and every hiding place, will live on the where-pea-hides page; this is the summary.

Pea protein isolate, in the plant-based aisle, is the headline hidden source. Pea protein isolate has become the protein the plant-based boom runs on. It is in plant-based meat (the Beyond Meat style of burger and grounds), in plant-based milks and dairy substitutes, in protein powders, bars, and shakes, and in “high-protein” almost-everything, often listed only as “pea protein,” “pea fiber,” or a generic “vegetable protein” or “plant protein” with no mention of pea. The cruel twist is that it is sold precisely as a soy-free, dairy-free protein, so the same shelf a family is often sent to in order to get away from soy or dairy is the shelf where pea is most concentrated and growing fastest. A product can be genuinely soy-free and dairy-free and still be built on pea, and the label need not say “pea” on an allergen line.

Pea protein is not a “clean,” hypoallergenic protein. Because it is marketed as a plant protein, families sometimes assume pea protein is gentle or allergen-free. It is not. Pea protein, including pea protein isolate, is a genuine allergen source that can drive systemic reactions in pea-allergic people, and the isolate actually concentrates the storage protein that drives reactions, so it raises exposure rather than lowering it.

Pea flour, pea starch, and whole-food peas. Pea flour and pea starch turn up in gluten-free pasta, crackers, snacks, and processed foods, and pea fiber appears in formulated products. Beyond the processed forms, split-pea soup, snow peas and snap peas, and garden or green peas are whole-food sources in their own right. Because pea’s protein survives heat (see below), a cooked or baked pea product is not a safe assumption.

Cooking does not help. Pea’s main protein is heat-stable and digestion-stable, so split-pea soup, a baked pea-flour good, and a cooked plant-based patty are not safer for having been cooked. This is the opposite of the intuition some families carry from allergens that break down with heat, and it is why label and chef-card scanning matters even for cooked food.

For the complete list of names and hiding places, and the label-by-label scanning routine, see the where-pea-hides page.

How exposure actually happens

The routes parents fear most are usually not the ones that cause serious reactions. Swallowing pea is the high-risk route. The rest are lower-risk than they feel, with one specific exception tied to the rise of pea-protein powders.

Eating it (high). Swallowing pea protein is the route that causes whole-body reactions, and because pea’s protein is heat-stable, cooked split-pea soup, baked pea-flour products, and cooked plant-based patties all count, alongside whole peas and pea protein isolate. Form does not rescue you the way it does for some allergens; cooking is not risk reduction for pea, and the concentrated isolate raises exposure rather than lowering it.

Skin contact (low to moderate, higher with eczema). Pea on intact skin usually causes at most a local reaction. Broken or eczematous skin is the exception where the risk is higher, the same impaired-barrier logic that operates for other food allergens.

Breathing it in, the powder exception (low for most, but documented). Ambient kitchen smells are not a meaningful route for most children. The documented exception is specific and increasingly relevant: aerosolized pea-protein powder, the fine dust thrown up when scooping or mixing a pea-protein shake, and pea-flour dust in a workplace that handles it, can be inhaled by a highly sensitized person. This affects a sensitized minority, not every pea-allergic child, and it is a who-it-affects note rather than an instruction. If your child is in that group, your allergist will say so, and the practical move is keeping a highly sensitized child away from pea-protein powder handling.

Reading labels

This is the habit that does the most day-to-day work, and for pea it comes with a twist that makes it more important, not less. The words to scan for are pea, peas, garden pea, green pea, split pea, field pea, snow pea, snap pea, pea protein, pea protein isolate, pea flour, pea starch, and pea fiber, plus the botanical name Pisum sativum.

Here is the twist, and it is the single most important label fact for a pea-allergic family: pea is not a major allergen anywhere it would help you most. In the US, pea is not one of the nine FALCPA major allergens, so a US label is not required to declare it on the bold “contains” line. In the European Union and the United Kingdom, pea is not one of the named Annex II allergens either (among legumes, only peanut, soybean, and lupin are named), so the bold allergen line will not flag pea there either (FALCPA; EU 1169). Unlike soy and lupin, which at least must be declared in the EU, pea has no better-labeled market to fall back on. The work shifts onto you: read the full ingredient list, not the allergen line, everywhere, and treat the plant-based and high-protein products as a stop-and-check.

A few terms are signals to slow down: “vegetable protein” and “plant protein” or “plant-based protein” (a likely place for pea protein, often with the source plant unstated), “legume protein” (non-specific, may include pea), and “high-protein” or “protein-enriched” blends, bars, and flours, especially in soy-free or dairy-free products. Then there are the precautionary labels: “may contain pea,” “made in a facility that also processes legumes.” These are voluntary and unregulated, and for a non-named allergen like pea they are rarely applied at all, so their absence is not reassurance. How strictly you treat them is a personal call along a spectrum, weighing a real but variable cross-contact risk against ruling out a large share of the grocery store. This page will not pick that threshold for you. For the full scanning routine, see the where-pea-hides page.

Severity, and what predicts a bad reaction

Pea is a legume capable of systemic reactions including anaphylaxis, though at the population level a severe reaction is occasional rather than typical, and the storage-protein (Pis s 1) profile is the systemic-capable phenotype, heat- and digestion-stable. The strongest population-level signals of a more severe course are sensitization to Pis s 1 and a history of a previous severe reaction. Pea does not have a standardized eliciting-dose threshold the way some allergens do, so there is no single number that predicts a reaction; cofactors such as exercise, illness, and certain medicines can lower the threshold on a given day.

Here is the part that justifies always carrying epinephrine. The size of the last reaction does not reliably predict the next one. A child whose only reaction so far was mild can still have anaphylaxis next time. That is not a reason to live in fear; it is the single reason the auto-injector travels everywhere.

Emergency preparedness

Anaphylaxis from pea allergy is treated epinephrine-first. Epinephrine is the first-line treatment for a severe reaction, not an antihistamine and not a wait-and-see. If you see anaphylaxis, you give epinephrine and then you call emergency services.

The signs that mean epinephrine now include any two body systems reacting at once (for example hives plus vomiting), or any single severe sign on its own: trouble breathing, throat tightness, a hoarse or weak cry, repetitive coughing, pale or floppy appearance, or a sense of impending doom in a child old enough to say so. When you are unsure, the guidance is to give epinephrine, because the danger of withholding it in a true reaction is far greater than the danger of giving it when it turns out you did not need to.

After giving epinephrine, call emergency services and lay the child down with legs raised, unless breathing is the main problem, in which case let them sit up. A second dose may be needed if there is no improvement in about five minutes. Every child with pea allergy should have a written anaphylaxis action plan and the epinephrine auto-injectors their allergist prescribes, going everywhere the child goes.

This section is general. Your child’s own plan is the specific one, and it is the one to follow.

When you can’t tell what’s happening

The hardest moments are usually not the clear reactions. They are the ambiguous ones. A flushed cheek after a new food. A single cough. A child who says their tummy hurts an hour after a meal you did not pack. Telling the start of a reaction apart from an ordinary toddler complaint is genuinely hard, and it does not resolve cleanly from across the room. Pea adds its own version, because it hides so easily (in a plant-based patty, in a “vegetable protein,” in a protein bar) that the question “did they even eat pea?” is often the first hard part.

The posture that works is to treat the spectrum, not to diagnose it in the moment. Know your action plan’s override signs cold, watch whether more than one body system is involved rather than fixating on a single symptom, and accept that you will sometimes give epinephrine or call the allergist for something that turns out to be nothing. That is the system working the way it is supposed to.

The competence here builds slowly, over many ambiguous afternoons. It shows up as a shorter pause before you act.

Treatment options

Strict avoidance is the floor, and for pea it is also nearly the whole of it, which is the honest picture rather than a gap. Avoidance of pea in all its forms (whole peas and split-pea soup, pea flour and pea starch, and above all the pea protein and pea protein isolate that hide in plant-based meat, plant milks, protein powders, and bars) plus a written action plan plus the epinephrine your allergist prescribes is the standing setup. Because chickpea and lentil genuinely cluster with pea (see Cross-reactivity), avoidance often extends to them pending your allergist’s testing, rather than being assumed either way.

There is no pea immunotherapy. Unlike peanut, pea has no FDA-approved desensitization product and no community-standard pea oral immunotherapy; the legume immunotherapy research is dominated by peanut, and pea is not a current target. So there is no “build up tolerance” option to weigh for pea, and this page does not point you toward one. No disease-modifying therapy for pea is available; acute management remains epinephrine-first for systemic reactions per the written action plan.

Not medical advice. Whether to treat at all, and how, is a conversation with your allergist.

Day-to-day living

School and day care. A child with pea allergy needs a written plan on file, epinephrine truly accessible, trained staff, and a clear routine for snacks, classroom parties, and substitute teachers. In US public schools, a 504 plan is the usual way to put that in writing. Because pea is not a named allergen on US or EU labels, the plan should spell out the pea-protein and plant-based forms explicitly, since staff used to reading “contains” lines may not know that a plant-based burger or a protein bar can be a pea source.

Restaurants. Pea is woven through everyday menus as a whole food (split-pea soup, garden and snap peas in stir-fries and sides) and, increasingly, as pea protein in plant-based meat on fast-casual and restaurant menus. A chef card that names pea and its hidden forms (pea protein, pea flour, “plant-based protein,” “vegetable protein”) in writing does more than a verbal order across a loud kitchen, and it is worth asking specifically whether a “meatless” or plant-based item is made with pea protein.

Travel. Bring more epinephrine than you think you need, carry food you trust, and look up pharmacies and emergency numbers before you land. Pea is common across many cuisines, and plant-based products built on pea protein are spreading internationally, so confirm dishes carefully, especially since the local label, like the US one, will not flag pea.

Holidays and gatherings. Pea-dense settings include plant-based and “high-protein” spreads, split-pea and pulse soups, and the rising crop of plant-based meat and milk products. Bringing your child’s own food and being plain with hosts beats hoping a buffet is safe.

Prognosis and outgrowing

The natural history of pea allergy is less studied than peanut, milk, or egg, so this page carries the honest uncertainty rather than a borrowed number. Pea is not among the allergens with well-characterized outgrowth cohorts, so no replicated pea-specific resolution rate exists; legume-allergy persistence is variable and population-dependent, and this page does not borrow a peanut or soy number to fill the gap. The reasonable predictive direction, stated as direction only, is that a falling pea (or Pis s 1) specific IgE over time is the encouraging sign, while a persistently high storage-protein specific IgE is associated with the allergy lasting.

The one definitive test of outgrowing it, or of sorting out a discordant result, is a supervised oral food challenge, offered when the specific IgE has fallen and the child has been reaction-free; because Pis s 1 is heat-stable, a challenge uses cooked pea in the form the child would actually eat. Reassessment cadence is individualized, with no pea-specific consensus interval, and is a conversation with your allergist rather than a fixed schedule.

Questions for your allergist

You do not have to walk in knowing the science. You have to walk in with the right questions, and these are them.

1. Given how easily pea hides and that the label may not flag it, what exactly should we be avoiding, including pea protein, plant-based meat, protein powders and bars, and “vegetable protein” blends?
2. Because pea protein isolate is now in so many plant-based meats, dairy substitutes, and protein bars, and it is not a labeled allergen, how should I screen ingredient lists, and does our soy or dairy avoidance put us at higher exposure to it?
3. Do chickpea and lentil need testing, since pea clusters with them, and which of them are actually off the plate for us versus which can we test rather than assume?
4. Is peanut something we need to sort out, given that a pea allergy does not reliably mean peanut is fine?
5. Are the other, unrelated legumes a real concern for my child, or is the positive panel mostly cross-sensitization we should not over-avoid?
6. Is pea component testing (Pis s 1) available for us, and what would it add over the standard test?
7. When and how should we reassess to see whether my child is outgrowing pea allergy?
8. What will epinephrine, and any treatment we are considering, actually cost us, and what does our insurance cover?

The frame: how to hold this

There are two worlds, and a severe food allergy moves a family from one into the other. In the recoverable world, a mistake is a lesson. A forgotten jacket is a cold afternoon. In the irrecoverable world, one wrong protein is not a lesson, because the cost of the error can be the child. When someone tells an allergy parent to relax, they are speaking from the first world to someone who has had to move to the second. They think the parent is anxious. The parent is not anxious. The parent is calibrated.

The work, then, is to sort what is on your side of the line from what is not. On your side: the full ingredient list you read because the allergen line will not help you, the plant-based aisle you treat as a scanning zone rather than a safe one, the chickpea and lentil you get tested rather than guess at, the component test you ask about, the epinephrine that travels with the child, the chef card that names pea protein and plant-based meat, the plan on file at school that spells out the forms staff will not otherwise know. Not on your side: the protein bar that is built on pea and does not have to say so, the label that is legally allowed to stay silent, the relative who thinks one bite is kindness. You do the things on your side fully, and you stop apologizing for them. And you hold, without pretending otherwise, that the other side is real and partly random, and that a stacked defense reduces the risk without ever closing the gap to zero.

Pea carries a particular version of this, because its hardest feature and its honest reassurance sit side by side. The label will not protect you, cooking will not defuse it, and the plant-based aisle hides it precisely where families go to feel safe, so the vigilance is real. And at the same time, the legume panel that looked frightening usually narrows down: chickpea and lentil genuinely need checking, peanut is its own real question, but the long list of other legumes is mostly over-avoided. That narrowing is real, and it is also not yours to grant from the kitchen: the testing, the challenge, the decision about which legumes come back, all of it runs through your allergist, who actually knows your child. This page does not promise safety. It lays out the layers and names the gap, and it leaves the calibration to you and your allergist.

Related pages on this site

• Where pea hides: the pea label-reading guide, the full scan, the lexicon, and the plant-based-aisle danger zone
• The legume family and cross-reactivity: pea, chickpea, lentil (owns the chickpea-lentil-pea cluster rates and the legume-by-legume picture)
• Pea and peanut: does a pea allergy mean a peanut allergy? (owns the pea-peanut edge and direction)
• Seed-storage proteins and the legume syndrome (owns the 7S vicilin mechanism behind the cluster)
• Component testing for pea: Pis s 1 and its limits
• Building a pea-allergy 504 plan
• Restaurants with a pea-allergic child

These companion pages are being written and will be linked here as each one goes live.

Frequently asked questions

Does a US label have to say “pea”?

No. Pea is not one of the US major food allergens, so a US ingredient label is not federally required to declare it on the bold “contains” line, and the EU and UK do not name pea either. Pea can appear in the general ingredient list as pea protein, pea protein isolate, pea flour, or inside a “vegetable protein” or “plant protein” blend with no allergen call-out. Read the full ingredient list, not just the allergen line, and see Reading labels.

Why does pea hide in the plant-based aisle?

Because pea protein isolate is the protein the plant-based boom runs on. It is a soy-free, dairy-free protein, so food makers use it in plant-based meat (the Beyond Meat style), plant-based milks, protein powders, bars, and “high-protein” foods. The aisle a family is often sent to in order to get away from soy or dairy is the aisle where pea is most concentrated, and the label need not name it. A “soy-free, dairy-free plant protein” is free from the things it names, not necessarily free from pea (see Hidden sources).

Is pea protein hypoallergenic, since it is a “clean” plant protein?

No. Pea protein, including pea protein isolate, is a genuine allergen source that can cause systemic reactions in pea-allergic people, and the isolate concentrates the storage protein that drives reactions, so it raises exposure rather than lowering it. It is marketed as soy-free and dairy-free, which makes it an under-recognized exposure precisely for people who switched away from soy or dairy (see Hidden sources).

My child is allergic to pea. Do they have to avoid chickpea and lentil?

Test, do not assume. Pea, chickpea, and lentil are the one legume group where cross-reactivity is genuinely clinical, so a pea-allergic child does warrant testing chickpea and lentil rather than treating them as automatically safe. Your allergist decides which are actually off the plate; see Cross-reactivity.

Does cooking destroy pea’s allergen?

No, not reliably. Pea’s main protein is heat-stable and digestion-stable, so cooked split-pea soup, baked pea-flour products, and cooked plant-based patties still carry the allergen. This is the opposite of allergens that break down with heat, which is why the label and chef-card scanning matters even for cooked food (see Hidden sources).

Is there a treatment for pea allergy?

There is no FDA-approved pea treatment and no standard pea oral immunotherapy. The mainstays are strict avoidance, a written action plan, and the epinephrine your allergist prescribes. No disease-modifying therapy for pea is available, so management is acute (epinephrine-first for a systemic reaction) and preventive (avoidance and label reading); see Treatment options.

Voices: living with pea allergy

This is one other family’s experience, shared in their own words and attributed to its source. It is not medical advice, and it is not a substitute for your allergist.

“Vanessa was eating a piece of pepperoni and then putting one on the pizza and suddenly her face swelled up.”

Source: Mary Campagna, in Melanie Glanz, CBC News, 2019. https://www.cbc.ca/news/health/food-allergy-pea-protein-1.5118978 A mother in Woodbridge, Ontario, describing a homemade-pizza night when her ten-year-old daughter Vanessa, who is allergic to peas among other legumes, reacted to pea protein hidden in the pepperoni. Campagna scans ingredient lists because pea protein, unlike nuts, is not a labeled allergen in Canada. One family’s experience, not medical guidance.

References and medical review

This page is pending independent medical review; the note at the top of the page applies until a reviewer is assigned. The references below resolve every in-body citation. The chickpea-lentil-pea cluster, the bounded unrelated-legume over-avoidance reassurance, the lupin caution, and the pea-protein-isolate hidden-source fact resolve to the project’s verified cross-reactivity and hidden-source floor; the pea-peanut reassurance is contradicted at the floor and is not rendered. Where a reference has no resolvable stable identifier, it is listed bibliographically without a link rather than with an unverified URL.

1. Food Allergen Labeling and Consumer Protection Act of 2004 (FALCPA), as amended by the FASTER Act of 2021; the major US allergens name peanut and soybean among legumes but not pea. https://www.fda.gov/food/food-allergensgluten-free-guidance-documents-regulatory-information/food-allergen-labeling-and-consumer-protection-act-2004-falcpa
2. Regulation (EU) No 1169/2011 (Annex II allergens name peanut, soybeans, and lupin among legumes but not pea; the UK retains the same list in domestic law). https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32011R1169
3. Pea molecular-component review (Pis s 1, a 7S vicilin/convicilin seed-storage protein, heat- and digestion-stable; the mechanism and anaphylaxis ceiling; severity stratification; the absence of a standardized Pis s 1 eliciting-dose cutoff; exposure pathways including the aerosolized-powder inhalational route; the no-pea-OIT treatment landscape; and the natural-history direction).
4. Pea protein isolate as a rising hidden source in plant-based foods, and the correction that pea protein is a genuine allergen rather than a hypoallergenic “clean” protein.
5. Togias A, Cooper SF, Acebal ML, et al. Addendum guidelines for the prevention of peanut allergy in the United States (NIAID-sponsored expert panel; cited for the avoidance-plus-action-plan baseline and the anaphylaxis-escalation default). J Allergy Clin Immunol. 2017;139(1):29-44. https://doi.org/10.1016/j.jaci.2016.10.010
6. Cross-reactivity and hidden-source claims above resolve to the project’s verified floor: the chickpea-lentil-pea cluster (GREEN, avoidance-direction) and the pea-protein-isolate hidden-source and US labeling-gap fact (GREEN, avoidance-direction). The unrelated-legume over-avoidance reassurance renders only in its bounded “confirm with your allergist before introducing” form, with the specific rate dropped and explicitly not extended to peanut or to chickpea and lentil. The pea-peanut reassurance is contradicted at the floor (a meaningful share of pea-allergic people also react to peanut) and is therefore not rendered; the pea-peanut direction lives on the cross-reactivity page. The lupin caution renders only in its avoidance-framed do-not-assume form. Each cleared id carries its own tier-1 citation in the floor file.