Pea protein

Legume · evidence: Contested · on 266 of 2,354 verified labels

Pea protein appears on 266 of the 2,354 pet food labels we have verified against the official product label — 11.3% of the corpus. That is 153 dog foods (13.8% of the dog corpus) and 113 cat foods (9.1% of the cat corpus). Nobody publishes that split because computing it means reading every label.

What it is, and why it is in the food

A concentrated protein fraction extracted from peas, used to raise a food's protein content without added meat. As a pea-derived pulse ingredient it falls within the group of legume ingredients examined in the FDA's open 2018 investigation into diet-associated canine DCM; metabolomic work has flagged pea-related compounds, but causation has not been shown. Evidence isolating pea protein specifically is limited, and no causal link or recall exists. Its main nutritional note is that it substitutes plant protein for animal protein.

The evidence is limited. Much of what is written about this ingredient online is extrapolated from other species, other doses, or nothing at all.

How common it is, and where it sits on the label

Ingredients are listed by pre-cooking weight, so position carries information: something in the first five is present in bulk, something near the end is a trace addition. Pea protein is in the first five ingredients on 68 of the 266 foods that contain it — 26% — so on those it is a structural part of the recipe rather than an additive.

Every food that contains it, cheapest calories first

Ranked by cost per 1,000 kcal, which is the only price basis that survives different bag sizes and moisture levels. 125 of the 266 foods containing pea protein have a matched price; the rest are verified but unpriced.

“Check price” links go to a retailer and we may earn a commission — it does not change what is in this table, which is ranked purely on verified cost per 1,000 kcal. Full affiliate disclosure.

Showing the 12 cheapest of 266. The complete list, including unpriced foods, is in the JSON endpoint.

What actually differs about the foods that use it

Held to one species and one form — dry dog food — so the comparison is not just measuring moisture. 125 verified dry dog foods list pea protein; 525 do not. These are medians across those two groups.

Across every food that lists it, pea protein sits at position 7 in the ingredient list on a median food. The brands using it most in our corpus are Blue Buffalo (119), Hill's Science Diet (36), Merrick (25), Nutro (19), Fromm (17). A difference in this table is an association, not a cause: brands that reach for one ingredient tend to make similar formulation choices across the whole recipe.

Comparable foods that do not list it

Most people searching an ingredient name want the other half of the answer: what to buy instead. These are verified dry dog foods — the same species and form as most of the foods above, so the comparison is like for like — that do not list pea protein anywhere in their ingredients, cheapest per 1,000 kcal first.

Avoiding one ingredient is rarely a good reason to switch on its own. Use this table the way you would use any other single filter — alongside the AAFCO statement, the protein figure and the recall record, all of which are on each food's page.

What we don’t know

Our figure counts what manufacturers print. An ingredient that arrives inside another component — a preservative already in the fish meal, say — does not have to be declared separately by the pet-food maker, so a count from labels is a floor, not a ceiling. We also cannot see inclusion rate: a label tells you pea protein is present and roughly where it sits by weight, never how much.

The gap here is inclusion rate, and it matters more than usual. The FDA’s grain-free/DCM inquiry centres on how much legume is in a food, not whether any is — and inclusion rate is exactly the number a label never prints. Position by weight is the closest proxy available, which is why it is on this page. We do not translate any of this into a score. There is no honest way to weigh one ingredient against a food’s AAFCO substantiation, its recall history and its cost, and sites that do it anyway are making the weighting up.

Sources

• FDA/CVM — Investigation into Potential Link between Certain Diets and Canine Dilated Cardiomyopathy (2022)
• Mornard L, Massara Brasileiro AC, Marcondes-Santos M. Role of Diet as a Predisposing Factor for Dilated Cardiomyopathy in Dogs: A Narrative Review. Veterinary Sciences (2025)
• Prevalence figures: Verified Pet Food Data corpus, 2,354 labels verified against official product labels. Machine-readable, CC BY 4.0.

Related ingredients

• Peas

  On 962 labels (40.9%). Contested.

• Chickpeas (garbanzo beans)

  On 154 labels (6.5%). Contested.

• Lentils

  On 129 labels (5.5%). Contested.

Frequently asked

All 35 ingredients we found on a real label are indexed on the ingredient hub. To see how these fields are read off a label in the first place, start with how to read a pet food label.