Pea Protein
A concentrated protein extract from yellow peas, common in grain-free formulas as a replacement for corn and wheat. Also appears as peas, pea starch, or pea flour. Its presence does not make a food better — it makes the protein percentage look better.
Why manufacturers use it
Pea protein solves a marketing and formulation problem simultaneously. Grain-free products cannot use corn or wheat, but still need cheap protein and calories. Pea protein has a crude protein content above 80%, allowing manufacturers to inflate a product's stated protein percentage substantially while reducing the amount of expensive meat required.
What the evidence says
Pea protein has an inferior amino acid profile for obligate carnivores. It is particularly low in methionine, taurine, and arginine — amino acids cats require in quantities that plant sources cannot reliably supply. The FDA has investigated a potential link between legume-heavy grain-free diets and dilated cardiomyopathy (DCM) in dogs; evidence in cats is less established, but the underlying nutritional concern — insufficient taurine — applies equally. A product with named chicken as the first ingredient but pea protein at positions 3–5 is structurally different from one where chicken dominates throughout.
How it affects a product's score
Pea protein does not have its own risk factor, but its presence affects the protein ranking when it displaces animal ingredients in the top positions. A product where peas or pea protein appear in the top three will typically receive a lower protein ranking score, since those slots are occupied by plant rather than animal protein. See the low-animal-protein risk factor for how this is scored.
Reviewed products containing peas or pea protein (11)