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Ingredient file // Other

Dried Aspergillus Niger Fermentation Extract

An enzyme extract with an unproven payoff

This dried extract comes from a controlled Aspergillus niger fermentation. Makers add it for enzyme activity, but the ingredient name does not identify the enzymes or show whether enough remain active in the finished food to improve a dog's digestion.

Role in the food Does a job
What it is
A dried extract of water soluble material produced during controlled Aspergillus niger fermentation.
Made from
Extracted material from fungal fermentation
Main job
Adds enzyme activity
Typical amount
Not published
Watch for
Unspecified activity in finished food
Not the same as
A live probiotic

Straight answer

Is Dried Aspergillus Niger Fermentation Extract safe for dogs?

Judge the food, then ask about activity

A late listing makes sense for an enzyme preparation. Judge the food by its main ingredients and nutritional adequacy first. If the bag promises better digestion from this extract, ask the maker which enzymes it guarantees in the finished food and for dog feeding evidence at that dose.

Why it is in the food
Adds enzyme activity

Our read // In our catalog

In 1 of every 21 foods we track

Share of foods that list it

5%

156 of the 3,204 foods with an ingredient list on file, from 6 brands. All dry dog food.

Each square is 1% of the catalog

Where it sits on the label

Median position 57.5. In the top five of 0 foods, so it is usually a minor ingredient.

Top five List position, heaviest first

Above the salt

0%

Usually listed after the salt, which caps it at roughly 1% of the recipe in 100% of foods.

Price per lb

Foods with it $2.95
All foods $3.25

Median of the cheapest bag price across 117 priced foods, 9% below the catalog. The price is the food's, not the ingredient's.

Who leans on it

65%

of the foods that list it are from Blue. 6 brands use it in total.

What it is

How it is made

Enzyme makers grow selected Aspergillus niger strains to produce useful compounds. The extract is made for that purpose, rather than recovered as a leftover from another industry. One supplier dries it on wheat bran.5,6,7

  1. 01 // Source Fermentation medium A selected fungal strain grows in a nutrient medium; the strain and medium vary by manufacturer.
  2. 02 // Process Grow the fungus Controlled fermentation produces enzymes and other compounds in the surrounding material.
  3. 03 // Process Extract and dry Water soluble material is separated and dried; one feed supplier uses wheat bran as a carrier.
  4. 04 // Output Dry extract The powder reaches the kibble plant with no specific enzyme or activity identified by its ingredient name.

What is in it

Composition, dry matter

8-9

% protein

Two dried test batches of one Aspergillus niger cellulase preparation contained this much protein. They do not set a standard for dog food extracts.

Protein 8.1-9.4%7
Gum arabic carrier 9.6-9.9%7
Ash 4.3-5.4%7

These figures were calculated from the published water contents of 2 dried laboratory batches of a specific cellulase preparation. They do not describe every extract sold under this ingredient name; carriers and enzyme mixes vary.6,7

Why it is in the bag

Added for enzyme activity, not nutrition, in small amounts

  1. Main nutrition
  2. Supporting nutrient
  3. Does a job
  4. Mostly filler

Makers add it for enzyme activity, not for bulk or nutrients. It often appears late in the list, and lists run by weight, so it is likely too little to add meaningful protein or calories. Whether the enzymes do anything is the open question: a related Aspergillus niger enzyme product at 200 mg per kg shifted fecal Lactobacillus in Beagles without changing fermentation products.4,9

  1. 01

    Adds targeted enzymes

    An Aspergillus niger extract can supply enzymes that break down parts of food. One supplier guarantees cellulase and amylase activity, but the ingredient name identifies neither enzyme nor its activity.5,6

  2. 02

    Tests cheaper formulations

    A supplier involved in a dog trial proposed using protease to reduce protein costs. The trial measured digestibility, not whether a cheaper finished recipe nourished dogs as well.1

How much No usual amount is published for this exact extract; a dog trial tested a related Aspergillus niger fermentation product at 200 mg per kg of food.2,5

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

    Added enzymes make kibble easier to digest

    Outruns the evidence

    Evidence

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

    A trial in 10 dogs found higher protein digestibility with a mixed Aspergillus niger and Bacillus subtilis protease, 93.3% versus 90.7%. Other dog trials found no general digestibility gain from enzyme blends. None tested this unspecified extract.1,2,3

  2. Brands say

    Its enzymes give dogs a healthier gut

    Outruns the evidence

    Evidence

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

    In 12 Beagles fed a related enzyme product, fecal Lactobacillus abundance rose, but measured fermentation products did not change. A bacterial shift alone does not demonstrate better gut health, and the tested product was not this extract.4,5

  3. Brands say

    It unlocks minerals trapped in plants

    Outruns the evidence

    Evidence

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

    A crossover trial in 12 dogs tested a related enzyme blend on a high phytate diet and found no improvement in zinc availability. The ingredient name does not even specify whether this extract supplies active phytase.2,5

  4. Owners say

    The extract adds live beneficial fungus

    Outruns the evidence

    Evidence

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

    The Canadian feed listing describes this dried extract as nonviable and requires a statement that it is not a source of live microbial cells. Aspergillus niger makes the extract; it is not supplied as a probiotic.5

Straight answers

What owners ask

  1. Q01

    Is it just filler?

    No

    It is added for enzyme activity, not to bulk out the recipe. Whether that activity survives processing or changes your dog's digestion is a separate question the ingredient name cannot answer.5,6

  2. Q02

    Does it replace a probiotic?

    No

    A probiotic supplies live microbes. This is a dried fermentation extract, and its feed listing says it is not a source of viable cells. Read any probiotic claim elsewhere on the bag separately.5

  3. Q03

    Does its position tell me the dose?

    Only roughly

    Ingredients appear from greatest to least by weight, so a late listing signals a minor addition. It does not disclose the enzyme dose, measured activity or activity remaining after processing.6,9

Who uses it

Brands, best sellers and the company it keeps

Top brands, by foods that list it

  1. Blue 102 / 186
  2. Horizon 25 / 27
  3. Nature's Logic 24 / 32
  4. Evanger's 2 / 30
  5. I and Love and You 2 / 23
  6. Instinct 1 / 98

Foods that list it / all the brand's recipes we track.

Amazon best sellers that list it

  1. #1 Blue Life Protection Formula Adult Chicken and Brown Rice Recipe Dry Dog Food
  2. #5 Blue Life Protection Formula Adult Small Breed Chicken and Brown Rice Recipe Dry Dog Food
  3. #27 Blue Life Protection Formula Senior Chicken and Brown Rice Recipe Dry Dog Food
  4. #35 Blue Life Protection Formula Small Breed Senior Chicken and Brown Rice Recipe Dry Dog Food
  5. #51 Blue Wilderness Adult Chicken plus Grains Recipe Dry Dog Food

Rank on Amazon's dog food best seller list, checked October 2026.

Usually listed with, share of the foods that list it

  1. Mixed Tocopherols 61%
  2. Chicken Meal 56%
  3. Peas 55%
  4. Chicken Fat 50%
  5. Pea Starch 46%
  6. Chicken 44%
  7. Flaxseed 42%
  8. Natural Flavor 41%
  9. Tapioca Starch 35%
  10. Dried Tomato Pomace 34%
  11. Pea Protein 33%
  12. Oatmeal 32%

On the shelf

Foods that list Dried Aspergillus Niger Fermentation Extract

156 foods in our catalog list it. These 60 list it highest on the label.

Horizon Pulsar Grain-Free Salmon Formula Dry Dog FoodHorizonHorizon Pulsar Grain-Free Salmon Formula Dry Dog FoodDry // No. 18 on the labelHorizon Amicus Grain-Free All Life Stages Lamb Formula Dry Dog FoodHorizonHorizon Amicus Grain-Free All Life Stages Lamb Formula Dry Dog FoodDry // No. 19 on the labelHorizon Amicus Grain-Free All Life Stages Salmon Formula Dry Dog FoodHorizonHorizon Amicus Grain-Free All Life Stages Salmon Formula Dry Dog FoodDry // No. 19 on the labelHorizon Pulsar Grain-Free Turkey Formula Dry Dog FoodHorizonHorizon Pulsar Grain-Free Turkey Formula Dry Dog FoodDry // No. 20 on the labelEvanger’s Super Premium New! Gamebird Recipe with Coconut Oil for Dogs - Dry Dog FoodEvanger'sEvanger’s Super Premium New! Gamebird Recipe with Coconut Oil for Dogs - Dry Dog FoodDry // No. 25 on the labelEvanger’s Super Premium Game Bird Recipe with Coconut Oil Dry Dog FoodEvanger'sEvanger’s Super Premium Game Bird Recipe with Coconut Oil Dry Dog FoodDry // No. 25 on the labelInstinct Be Natural Puppy Real Chicken & Brown Rice Recipe Dry Dog FoodInstinctInstinct Be Natural Puppy Real Chicken & Brown Rice Recipe Dry Dog FoodDry // No. 26 on the labelHorizon Complete All Life Stages Whole Grain Chicken Formula Dry Dog FoodHorizonHorizon Complete All Life Stages Whole Grain Chicken Formula Dry Dog FoodDry // No. 26 on the labelHorizon Complete Whole Grain Large Breed Puppy Chicken Formula Dry Dog FoodHorizonHorizon Complete Whole Grain Large Breed Puppy Chicken Formula Dry Dog FoodDry // No. 27 on the labelNature’s Logic Original Pure Naturals Sardine Recipe Dry Dog FoodNature's LogicNature’s Logic Original Pure Naturals Sardine Recipe Dry Dog FoodDry // No. 29 on the labelI and Love and You Nude Super Food Poultry Palooza Grain-Free Dry Dog FoodI and Love and YouI and Love and You Nude Super Food Poultry Palooza Grain-Free Dry Dog FoodDry // No. 29 on the labelNature’s Logic Original Pure Naturals Beef Recipe Dry Dog FoodNature's LogicNature’s Logic Original Pure Naturals Beef Recipe Dry Dog FoodDry // No. 30 on the label
Show 48 more
Horizon Amicus Grain-Free All Life Stages Chicken Formula Dry Dog FoodHorizonHorizon Amicus Grain-Free All Life Stages Chicken Formula Dry Dog FoodDry // No. 20 on the labelHorizon Pulsar Grain-Free Lamb Formula Dry Dog FoodHorizonHorizon Pulsar Grain-Free Lamb Formula Dry Dog FoodDry // No. 20 on the labelHorizon Taiga Grain-Free Pork Formula Dry Dog FoodHorizonHorizon Taiga Grain-Free Pork Formula Dry Dog FoodDry // No. 21 on the labelHorizon Taiga Grain-Free Chicken Formula Dry Dog FoodHorizonHorizon Taiga Grain-Free Chicken Formula Dry Dog FoodDry // No. 21 on the labelHorizon Pulsar Grain-Free Pork Formula Dry Dog FoodHorizonHorizon Pulsar Grain-Free Pork Formula Dry Dog FoodDry // No. 21 on the labelHorizon Pulsar Grain-Free Chicken Formula Dry Dog FoodHorizonHorizon Pulsar Grain-Free Chicken Formula Dry Dog FoodDry // No. 21 on the labelHorizon Legacy Grain-Free Puppy Tri-Protein Formula Dry Dog FoodHorizonHorizon Legacy Grain-Free Puppy Tri-Protein Formula Dry Dog FoodDry // No. 22 on the labelHorizon Taiga Whole Grain Pork Formula Dry Dog FoodHorizonHorizon Taiga Whole Grain Pork Formula Dry Dog FoodDry // No. 22 on the labelHorizon Legacy Slim & Vibrant - Grain-Free Dry Dog FoodHorizonHorizon Legacy Slim & Vibrant - Grain-Free Dry Dog FoodDry // No. 24 on the labelHorizon Pulsar WG Salmon - Dry Dog FoodHorizonHorizon Pulsar WG Salmon - Dry Dog FoodDry // No. 24 on the labelHorizon Taiga Whole Grain Chicken Formula Dry Dog FoodHorizonHorizon Taiga Whole Grain Chicken Formula Dry Dog FoodDry // No. 24 on the labelHorizon Pulsar Small Breed ALS - Grain-Free Dry Dog FoodHorizonHorizon Pulsar Small Breed ALS - Grain-Free Dry Dog FoodDry // No. 25 on the labelHorizon Amicus Grain-Free Adult Tri-Protein Formula Dry Dog FoodHorizonHorizon Amicus Grain-Free Adult Tri-Protein Formula Dry Dog FoodDry // No. 25 on the labelHorizon Pulsar Whole Grain Pork Formula Dry Dog FoodHorizonHorizon Pulsar Whole Grain Pork Formula Dry Dog FoodDry // No. 25 on the labelHorizon Pulsar Small Breed Weight Mgmt - Grain-Free Dry Dog FoodHorizonHorizon Pulsar Small Breed Weight Mgmt - Grain-Free Dry Dog FoodDry // No. 26 on the labelHorizon Taiga XL - Dry Dog FoodHorizonHorizon Taiga XL - Dry Dog FoodDry // No. 27 on the labelHorizon Complete Whole Grain Senior Weight Management Chicken Formula Dry Dog FoodHorizonHorizon Complete Whole Grain Senior Weight Management Chicken Formula Dry Dog FoodDry // No. 28 on the labelHorizon Complete Whole Grain Large Breed Adult Chicken Formula Dry Dog FoodHorizonHorizon Complete Whole Grain Large Breed Adult Chicken Formula Dry Dog FoodDry // No. 28 on the labelHorizon Legacy Grain-Free Adult Tri-Protein Formula Dry Dog FoodHorizonHorizon Legacy Grain-Free Adult Tri-Protein Formula Dry Dog FoodDry // No. 28 on the labelNature’s Logic Original Pure Naturals Chicken Recipe Dry Dog FoodNature's LogicNature’s Logic Original Pure Naturals Chicken Recipe Dry Dog FoodDry // No. 30 on the labelNature’s Logic Grain-Free Canine Chicken Meal Feast Dry Dog FoodNature's LogicNature’s Logic Grain-Free Canine Chicken Meal Feast Dry Dog FoodDry // No. 30 on the labelNature’s Logic Distinction Canine Sardine Recipe Dry Dog FoodNature's LogicNature’s Logic Distinction Canine Sardine Recipe Dry Dog FoodDry // No. 30 on the labelNature’s Logic Distinction Canine Pork Recipe Dry Dog FoodNature's LogicNature’s Logic Distinction Canine Pork Recipe Dry Dog FoodDry // No. 30 on the labelNature’s Logic Distinction Canine Chicken Recipe Dry Dog FoodNature's LogicNature’s Logic Distinction Canine Chicken Recipe Dry Dog FoodDry // No. 30 on the labelNature’s Logic Distinction Canine Beef Recipe Dry Dog FoodNature's LogicNature’s Logic Distinction Canine Beef Recipe Dry Dog FoodDry // No. 30 on the labelNature’s Logic Grain-Free Canine Beef Meal Feast Dry Dog FoodNature's LogicNature’s Logic Grain-Free Canine Beef Meal Feast Dry Dog FoodDry // No. 31 on the labelNature’s Logic Canine Turkey Meal Feast Dry Dog FoodNature's LogicNature’s Logic Canine Turkey Meal Feast Dry Dog FoodDry // No. 32 on the labelNature’s Logic Canine Sardine Meal Feast Dry Dog FoodNature's LogicNature’s Logic Canine Sardine Meal Feast Dry Dog FoodDry // No. 32 on the labelNature’s Logic Canine Pork Meal Feast Dry Dog FoodNature's LogicNature’s Logic Canine Pork Meal Feast Dry Dog FoodDry // No. 32 on the labelNature’s Logic Canine Lamb Meal Feast Dry Dog FoodNature's LogicNature’s Logic Canine Lamb Meal Feast Dry Dog FoodDry // No. 32 on the labelNature’s Logic Canine Chicken Meal Feast Dry Dog FoodNature's LogicNature’s Logic Canine Chicken Meal Feast Dry Dog FoodDry // No. 32 on the labelNature’s Logic Canine Beef Meal Feast Dry Dog FoodNature's LogicNature’s Logic Canine Beef Meal Feast Dry Dog FoodDry // No. 32 on the labelNature’s Logic Distinction Grain-Free Land & Sea Recipe Dry Dog FoodNature's LogicNature’s Logic Distinction Grain-Free Land & Sea Recipe Dry Dog FoodDry // No. 32 on the labelI and Love and You Nude Super Food Red Meat Medley Grain-Free Dry Dog FoodI and Love and YouI and Love and You Nude Super Food Red Meat Medley Grain-Free Dry Dog FoodDry // No. 32 on the labelNature’s Logic Original Canine Grain Free Dry Kibble: Beef Dry Dog FoodNature's LogicNature’s Logic Original Canine Grain Free Dry Kibble: Beef Dry Dog FoodDry // No. 33 on the labelNature’s Logic Pure Naturals Grain-Free Chicken Recipe Dry Dog FoodNature's LogicNature’s Logic Pure Naturals Grain-Free Chicken Recipe Dry Dog FoodDry // No. 33 on the labelNature’s Logic Grain-Free Canine Duck & Salmon Meal Feast Dry Dog FoodNature's LogicNature’s Logic Grain-Free Canine Duck & Salmon Meal Feast Dry Dog FoodDry // No. 33 on the labelNature’s Logic Canine Rabbit Meal Feast Dry Dog FoodNature's LogicNature’s Logic Canine Rabbit Meal Feast Dry Dog FoodDry // No. 33 on the labelNature’s Logic Distinction Grain-Free Canine Red Recipe Dry Dog FoodNature's LogicNature’s Logic Distinction Grain-Free Canine Red Recipe Dry Dog FoodDry // No. 33 on the labelNature’s Logic Canine Venison Meal Feast Dry Dog FoodNature's LogicNature’s Logic Canine Venison Meal Feast Dry Dog FoodDry // No. 34 on the labelNature’s Logic Canine Duck & Salmon Meal Feast Dry Dog FoodNature's LogicNature’s Logic Canine Duck & Salmon Meal Feast Dry Dog FoodDry // No. 34 on the labelNature’s Logic Distinction Grain-Free Canine Fowl Recipe Dry Dog FoodNature's LogicNature’s Logic Distinction Grain-Free Canine Fowl Recipe Dry Dog FoodDry // No. 35 on the labelBlue Natural Veterinary Diet HF Hydrolyzed for Food Intolerance Grain-Free Dry Dog FoodBlueBlue Natural Veterinary Diet HF Hydrolyzed for Food Intolerance Grain-Free Dry Dog FoodDry // No. 44 on the labelBlue Natural Veterinary Diet NP Novel Protein Alligator Grain-Free Dry Dog FoodBlueBlue Natural Veterinary Diet NP Novel Protein Alligator Grain-Free Dry Dog FoodDry // No. 45 on the labelBlue True Solutions Small Breed Care Chicken & Oatmeal Recipe for Small Breed Adult Dogs Dry Dog FoodBlueBlue True Solutions Small Breed Care Chicken & Oatmeal Recipe for Small Breed Adult Dogs Dry Dog FoodDry // No. 47 on the labelBlue Basics Limited Ingredient Diet Small Breed Adult Dog Grain-Free Lamb and Potato Recipe Dry Dog FoodBlueBlue Basics Limited Ingredient Diet Small Breed Adult Dog Grain-Free Lamb and Potato Recipe Dry Dog FoodDry // No. 50 on the labelBlue Natural Veterinary Diet GI Gastrointestinal Support Dry Dog FoodBlueBlue Natural Veterinary Diet GI Gastrointestinal Support Dry Dog FoodDry // No. 51 on the labelBlue Basics Limited Ingredient Diet Adult Grain-Free Lamb and Potato Recipe Dry Dog FoodBlueBlue Basics Limited Ingredient Diet Adult Grain-Free Lamb and Potato Recipe Dry Dog FoodDry // No. 51 on the label

Sources

What we read

Checked September 1, 2026.

  1. 1 Addition of Protease Enzyme to Dog and Cat Feed and Its Influence on the Digestibility Coefficient, Immune Response, and Metabolic Biomarkers Food and Nutrition Sciences, 2024 // Journal
  2. 2 Effect of Zinc Source and Exogenous Enzymes Supplementation on Zinc Status in Dogs Fed High Phytate Diets Animals, 2020 // Journal
  3. 3 Enzyme effects on extruded diets for dogs with soybean meal as a substitute for poultry by-product meal Journal of Animal Physiology and Animal Nutrition, abstract hosted by EPA HERO, 2013 // Journal
  4. 4 Effects of Zinc Source and Enzyme Addition on the Fecal Microbiota of Dogs Frontiers in Microbiology, 2021 // Journal
  5. 5 Canadian Feed Ingredients Table Canadian Food Inspection Agency, n.d. // Regulator
  6. 6 Aspergillus niger Extract Specialty Products for Industry & Agriculture, n.d. // Industry
  7. 7 Safety evaluation of the food enzyme cellulase from the non-genetically modified Aspergillus niger strain 294 EFSA Journal, 2023 // Journal
  8. 8 Guidance for Industry: Recommendations for Submission of Chemical and Technological Data for Food Additive Petitions and GRAS Notices for Enzyme Preparations U.S. Food and Drug Administration, 2010 // Government
  9. 9 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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