Ingredient file // Other
Dried Lactobacillus Plantarum Fermentation Product
A probiotic label with a dose blind spot
This is a dried preparation made by growing L. plantarum in a nutrient medium. It is added for digestive health claims, but the ingredient name gives neither the strain nor the number of live cells your dog will eat.
- What it is
- A dried preparation made from L. plantarum culture, used as a microbial ingredient in pet food.
- Made from
- L. plantarum grown in nutrient medium
- Main job
- Microbial culture for digestive claims
- Typical amount
- Not published
- Watch for
- No viable count at feeding time
- Not the same as
- Heat-treated L. plantarum postbiotic
Our read // In our catalog
In 1 of every 12 foods we track
Share of foods that list it
8%
210 of the 2,595 foods with an ingredient list on file, from 18 brands. 209 dry dog food, 1 freeze-dried dog food.
Each square is 1% of the catalog
Where it sits on the label
Median position 30. In the top five of 0 foods, so it is usually a minor ingredient.
Above the salt
Usually listed after the salt, which caps it at roughly 1% of the recipe in 100% of foods.
Price per lb
Median of the cheapest bag price across 144 priced foods, 31% below the catalog. The price is the food's, not the ingredient's.
Who leans on it
16%
of the foods that list it are from Fromm. 18 brands use it in total.
What it is
How it is made
Culture producers grow selected L. plantarum strains for use in foods and feeds. They dry the culture to make it easier to store and measure into a recipe. This ingredient is deliberately produced, rather than left over from another industry.4,5,7
- 01 // Source Selected strain A producer starts with a particular strain, although the species name on the dog food label does not identify it.
- 02 // Process Grown in medium The bacteria multiply in a nutrient mixture; the choice of medium affects the resulting preparation.
- 03 // Process Dried Freeze drying or spray drying removes water, and the drying method affects how many cells survive.
- 04 // Output Culture powder The dried preparation is measured into pet food; its ingredient name alone does not state a viable dose.
What is in it
Composition, dry matter
48.1
% protein
Measured in one freeze-dried pea flour fermentate. It is an example of how medium shapes composition, not a standard for this additive.
Why it is in the bag
What the manufacturer gets
-
01
Supplies a microbial culture
Producers add it as a source of L. plantarum. A live probiotic effect depends on the particular strain and the number of viable cells delivered when the dog eats the food.1,4,7
-
02
Supports digestive claims
Brands describe this ingredient as helping digestion. Dog trials tested named strains or mixtures at measured doses, which do not show what an unspecified culture does in a particular kibble.1,2,8
-
03
Stores as a powder
Drying lets a producer ship and measure the culture. Researchers have grown L. plantarum on inexpensive soy processing residue to explore lower production costs at scale.5,7
How much A puppy trial gave 1 billion live L. plantarum cells daily for 8 weeks; it did not test a kibble inclusion percentage.1
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.
-
Brands say
Prevents digestive infections in puppies
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
In a 72-puppy study, groups given the named L. plantarum strain had fewer new gastrointestinal episodes late in the trial than controls. That result cannot be assigned to an unidentified strain or dose in kibble.1
-
Brands say
Helps dogs recover from diarrhea
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
A blinded trial enrolled 66 dogs with diarrhea, of whom 44 completed treatment. Stool scores improved more with a sour milk product containing L. plantarum and 2 other species than with placebo. It did not isolate this ingredient.2
-
Brands say
Balances the gut bacteria
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
After 8 weeks, puppies given a named L. plantarum strain had higher fecal Lactobacillus counts and lower Enterobacteriaceae counts than controls. Those measured changes do not prove lasting gut health benefits from every product bearing the species name.1
-
Brands say
Delivers live probiotics through shelf life
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
One freeze-dried L. plantarum formulation lost 5 to 6 logs of viable cells during 90 days at room temperature. AAFCO calls for a viable cell guarantee when live microbes are claimed; the ingredient name states no delivered count.4,6
Straight answers
What owners ask
-
Q01
Is it just filler?
NoIt is added for its microbial culture, not to bulk out the recipe. Whether it benefits your dog depends on the strain and the viable dose, neither of which appears in this ingredient name.4,7
-
Q02
Are the bacteria still alive?
Check the guaranteeSome cells survive drying, but counts can fall during storage. Look for a live microbe guarantee in colony forming units, then ask the maker whether that count holds through the food's shelf life.4,6,7
-
Q03
Will it treat diarrhea?
No proofA sour milk product containing 3 named bacterial species improved stool consistency in a treatment trial. That does not show that an unspecified amount of this dried ingredient in kibble treats diarrhea.2
Who uses it
Brands, best sellers and the company it keeps
Top brands, by foods that list it
Plus 8 more brands.
Amazon best sellers that list it
- #8 Diamond Naturals Skin & Coat Formula All Life Stages Salmon & Potato Formula Dry Dog Food
- #17 Taste of the Wild High Prairie Canine Recipe with Roasted Bison & Roasted Venison Dry Dog Food
- #60 Fromm Four-Star Beef Frittata Veg® Recipe Dry Dog Food
- #86 Taste of the Wild Ancient Prairie Canine Recipe with Roasted Bison & Roasted Venison 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
- Chicken Fat 62%
- Peas 48%
- Chicken Meal 45%
- Natural Flavor 39%
- Chicken 36%
- Flaxseed 35%
- Potatoes 30%
- Egg Product 27%
- Brown Rice 23%
- Sweet Potatoes 23%
- Oatmeal 22%
- Dried Yeast 21%
Our read // On the bag
Check the viable count before trusting the claim
Read this as a small microbial addition to the recipe. Look for a viable cell guarantee and ask the maker for the strain and its count at the end of shelf life. Judge the food by its main ingredients and nutritional adequacy, not this line alone.
Sources
What we read
Checked October 1, 2026.
- 1 Characterization of Lactobacillus rhamnosus MP01 and Lactobacillus plantarum MP02 and Assessment of Their Potential for the Prevention of Gastrointestinal Infections in an Experimental Canine Model
- 2 A canine-specific probiotic product in treating acute or intermittent diarrhea in dogs: A double-blind placebo-controlled efficacy study
- 3 Effect of Lactobacillus plantarum Fermentation on the Surface and Functional Properties of Pea Protein-Enriched Flour
- 4 Pet Food Report Annual 2014 Appendix B: Revised Label Review Checklist
- 5 Okara: A Nutritionally Valuable By-product Able to Stabilize Lactobacillus plantarum during Freeze-Drying, Spray-Drying, and Storage
- 6 Development of freeze dried synbiotic formulation using a probiotic strain of Lactobacillus plantarum
- 7 Lactiplantibacillus Plantarum
- 8 Dried Lactobacillus plantarum Fermentation Product.