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Ingredient file // Plant protein

Rice Gluten

Useful rice protein, with no allergy guarantee

Rice gluten is a protein-rich fraction left when rice is processed for starch. It adds plant protein to dog food, but the name does not tell you how concentrated it is. Rice can still trigger a food reaction in an affected dog.

Rice Gluten
What it is
A dried, protein-rich rice fraction recovered when processors separate starch from the grain.
Made from
Rice grain during starch production
Main job
Adds plant protein
Typical amount
Not published
Watch for
A dog with a diagnosed rice allergy
Not the same as
Wheat gluten

Our read // In our catalog

In 1 of every 1298 foods we track

Share of foods that list it

0%

2 of the 2,595 foods with an ingredient list on file, from 1 brand. All wet dog food.

Each square is 1% of the catalog

Where it sits on the label

Median position 6.5. In the top five of 0 foods, so it is usually a supporting ingredient.

Top five List position, heaviest first

Above the salt

100%

Almost always listed before the salt, so there is more of it than a pinch.

Who leans on it

100%

of the foods that list it are from Authority. 1 brand use it in total.

What it is

How it is made

Rice starch plants wet mill grain to separate its starch. They recover and dry the protein-rich fraction for feed. How thoroughly they separate it affects the starch and fiber left in the meal.3,4

  1. 01 // Source Rice grain Processors start with rice grain as the raw material for starch production.
  2. 02 // Process Wet milled The grain is milled with water, which separates its starch from its protein-rich material.
  3. 03 // Process Protein recovered Processors collect the protein-rich fraction after separating much of the starch.
  4. 04 // Output Dried rice gluten The recovered fraction is dried into a meal for use in animal feed.

What is in it

Composition, dry matter

50

% protein

Crude protein in one analyzed rice gluten meal. That makes it a protein ingredient, though one sample cannot describe every supplier's meal.

Crude protein 50%3
Neutral detergent fiber 36.7%3
Crude fiber 9.5%3
Crude fat 6.9%3
Ash 4.4%3

These figures describe one rice gluten meal sample. FDA's separate rice protein concentrate definition requires at least 70% protein. The products are not interchangeable, and milling affects how much fiber remains.3,4

Why it is in the bag

What the manufacturer gets

  1. 01

    Raises recipe protein

    Separating much of the starch concentrates the rice protein. It contributes to the finished food's crude protein figure, which does not identify how much protein came from meat.3,4

  2. 02

    Uses a starch byproduct

    Starch production leaves a protein-rich fraction that feed makers can use. A poultry paper calls rice gluten meal lower cost, but it did not measure prices for dog food.3

How much A dog-food lab study tested 15% rice gluten; company-submitted dog digestibility tests used up to 9.6% of a separate rice protein concentrate.1,4

Our read // The claims

What the evidence supports

Strong: controlled studies in dogs agree. Some: small or mixed dog data. Thin: mechanism or lab work only. None: nothing, or the evidence points the other way.

  1. Brands say

    Rice gluten supplies digestible protein to dogs

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    Company-submitted dog tests reported 88 to 94% true protein digestibility for rice protein concentrate, a different ingredient. A recipe with 15% rice gluten digested well in a lab simulation, but that study fed no dogs.1,4

  2. Brands say

    Rice gluten is gentle for allergic dogs

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    A review found rice reactions in 5 of 297 dogs with reported food reactions. That count does not show that rice gluten prevents reactions or is safe for a dog whose trigger is rice.2

  3. Critics say

    Rice gluten is just filler

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    One analyzed rice gluten meal contained 50% crude protein on a dry matter basis, and researchers tested it in a dog-food recipe. It has a protein job, though a bag does not reveal how much it contributes.1,3

  4. Owners say

    Rice gluten contains wheat gluten

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    FDA describes the related protein concentrate as a fraction of rice grain and identifies dietary gluten with wheat, rye and barley. The word gluten in this rice ingredient's name does not mean wheat was added.4,5

  5. Brands say

    Rice gluten replaces animal protein completely

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    The FDA-reviewed rice protein concentrate was intended to accompany other proteins, not serve as the diet's sole protein source. That finding concerns a more refined rice product, so it gives no basis for treating rice gluten alone as a complete diet protein.4

Straight answers

What owners ask

  1. Q01

    Is it just filler?

    No

    Rice gluten contributes plant protein. One analyzed meal was 50% crude protein on a dry matter basis. Its share of this recipe still matters, and the ingredient list tells you only its rank by weight.3,7

  2. Q02

    Can it replace animal protein?

    Not alone

    The FDA-reviewed rice protein concentrate was intended to accompany other protein sources. Rice gluten is less refined than that product, so judge the complete food's nutrition instead of treating this ingredient as its sole protein.3,4

  3. Q03

    Does the name mean wheat?

    No

    The named grain is rice. FDA identifies dietary gluten with wheat, rye and barley. If your dog needs to avoid wheat, check the entire ingredient list rather than reading wheat into the name rice gluten.4,5,7

Who uses it

Brands, best sellers and the company it keeps

Top brands, by foods that list it

  1. Authority 2

Usually listed with, share of the foods that list it

  1. Chicken Broth 100%
  2. Chicken 100%
  3. Chicken Liver 100%
  4. Brewers Rice 100%
  5. Dried Plain Beet Pulp 100%
  6. Dried Egg Product 100%
  7. Guar Gum 100%
  8. Rice Flour 50%
  9. Carrageenan 50%
  10. Menhaden Fish Oil 50%

Our read // On the bag

Read it alongside the other rice ingredients

Rice gluten high on a list means its plant protein has a larger role; farther down, it has a smaller one. Check whether rice flour or brewers rice appears nearby, then judge the complete food. Skip rice gluten if your dog has a diagnosed rice allergy.

Sources

What we read

Checked October 1, 2026.

  1. 1 Comparative in-vitro Evaluation of Dog Food Using Either Rice Gluten or Maize Fibre with Commercially Available Dog Food Journal of Animal Research, 2021 // Journal
  2. 2 Critically appraised topic on adverse food reactions of companion animals (2): common food allergen sources in dogs and cats BMC Veterinary Research, 2016 // Journal
  3. 3 Evaluation of rice gluten meal as a potential alternate feed source for poultry The Indian Journal of Animal Sciences, 2022 // Journal
  4. 4 FDA response letter for AFIC 0001 U.S. Food and Drug Administration, 2025 // Government
  5. 5 Gluten and Food Labeling U.S. Food and Drug Administration, n.d. // Government
  6. 6 Chemical Contaminants U.S. Food and Drug Administration, n.d. // Government
  7. 7 What's in the Ingredients List? AAFCO, n.d. // Regulator
An ingredient on its own tells you very little. What matters is how much of it there is and where it sits in the list. That is why we weigh the top five rather than reacting to any single name further down. Back to the wiki

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