Ingredient file // Flavor
Spearmint
A mint flavor, not a dental treatment
Spearmint is an aromatic herb added to dog food for mint flavor and the promise of fresher breath. At flavoring amounts, it contributes little nutrition. Tests of concentrated spearmint oil do not show that dried spearmint in kibble improves dogs' breath or teeth.
- What it is
- Dried leaves from the spearmint plant, used in dog food for their characteristic mint aroma.
- Made from
- Harvested spearmint leaves
- Main job
- Mint flavor
- Typical amount
- Not published
- Watch for
- Large herb ingestions and concentrated oil
- Not the same as
- Spearmint essential oil
Our read // In our catalog
In 1 of every 108 foods we track
Share of foods that list it
1%
24 of the 2,595 foods with an ingredient list on file, from 3 brands. All dry dog food.
Each square is 1% of the catalog
Where it sits on the label
Median position 52. 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 21 priced foods, 10% below the catalog. The price is the food's, not the ingredient's.
Who leans on it
88%
of the foods that list it are from Wellness. 3 brands use it in total.
What it is
How it is made
Herb growers harvest spearmint for its aromatic leaves. Fresh leaves spoil quickly, so processors clean and dry them for longer storage, then grind the dried herb for mixing into food.1,2
- 01 // Source Spearmint leaves Growers harvest the leafy herb for its aroma, which comes from compounds in the leaves.
- 02 // Process Cleaned Unwanted stems, damaged leaves and foreign material are removed; the leaves are washed and drained.
- 03 // Process Dried Shade, sun or oven drying removes water, with each method changing the finished herb's composition.
- 04 // Process Ground The dry leaves are ground into smaller pieces so they are easier to measure and mix.
- 05 // Output Dried spearmint The ground herb reaches the food plant as a dry ingredient, distinct from concentrated spearmint oil.
What is in it
Composition, dry matter
43-53
% crude fiber
The range across shade and oven dried leaves in one study. It describes the herb, not the fiber contribution of a finished food.
Why it is in the bag
What the manufacturer gets
-
01
Adds mint aroma
The leaves carry aromatic compounds that give the recipe a mint scent. The herb's protein and fiber are incidental to that flavoring job.1,3,8
-
02
Supports breath marketing
A brand sells spearmint alongside parsley and fennel in a breath treat. The mint cue is easy to recognize, but the product claim does not prove an effect from spearmint alone.8
-
03
Stores as dried herb
Drying extends the leaves' shelf life and removes water before shipping. That makes the herb practical to store and measure as a minor recipe ingredient.2
How much No dog food inclusion rate was found; a poultry trial fed 1 to 2% dried spearmint, which does not set a canine dose.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
Spearmint keeps a dog's breath fresh
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
A branded breath treat combines spearmint with parsley and fennel. That shows how the herb is marketed, not whether it works. No trial cited here tested breath after dogs ate spearmint in kibble.8
-
Owners say
Spearmint keeps plaque off dogs' teeth
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
Spearmint oil at 0.5% reduced a bacterial biofilm grown on bovine enamel in a laboratory model. Dried leaves in dog food were not tested, so the experiment cannot show plaque control in dogs.3,9
-
Brands say
Spearmint gives dogs antioxidant protection
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
Researchers tested spearmint oil in chemical assays, cells and worms. The native spearmint oil did not improve worm survival under oxidative stress. None of those tests measured a benefit in dogs eating dried spearmint.4
-
Owners say
Spearmint in dog food is poisonous
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
ASPCA warns that large mint ingestions cause vomiting and diarrhea. EFSA separately judged a defined spearmint oil additive safe at up to 10 mg/kg of complete feed. Neither source measures dried spearmint in a particular kibble.5,6
-
Owners say
Spearmint soothes a dog's stomach
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
A poultry trial fed 1 to 2% spearmint and measured growth and feed intake, not relief of stomach symptoms. Traditional use of mint for digestion does not supply treatment evidence for dogs eating kibble.1,3
Straight answers
What owners ask
-
Q01
Is it just filler?
No, flavorIt has a job: adding mint aroma. Spearmint is not the food's main protein, starch or fiber source. Its position on the ingredient list shows relative weight, not an exact amount.1,7,8
-
Q02
Will it clean my dog's teeth?
No proofAn oil experiment on a laboratory biofilm does not show that dried spearmint in kibble removes plaque. For dental care, look for a product with a Veterinary Oral Health Council seal and brush your dog's teeth.3,9,10
-
Q03
Is spearmint oil the same thing?
NoDried spearmint is leaf material; essential oil is its concentrated aromatic fraction. ASPCA warns about swallowing concentrated oils. EFSA's feed assessment applies to a defined oil dose, not a bottle given directly to a dog.5,11
Who uses it
Brands, best sellers and the company it keeps
Top brands, by foods that list it
Amazon best sellers that list it
Rank on Amazon's dog food best seller list, checked October 2026.
Usually listed with, share of the foods that list it
- Dried Plain Beet Pulp 88%
- Chicken Meal 71%
- Chicken Fat 71%
- Flaxseed 67%
- Peas 63%
- Dried Yeast 58%
- Oatmeal 54%
- Organic Sorghum 50%
- Turkey 42%
- Barley 38%
- Salmon Meal 33%
- Turkey Meal 29%
Our read // On the bag
Read spearmint as flavor, then move on
Spearmint low on an ingredient list is a flavor cue, not a meaningful protein or fiber source. Judge the food by its main ingredients and nutritional adequacy. For dental promises, look for evidence on the finished product. Persistent bad breath calls for a mouth check, not more mint.
Sources
What we read
Checked September 1, 2026.
- 1 Effect of Dietary Levels of Spearmint (Mentha spicata) on Broiler Chicks Performance
- 2 Effect of the Drying Method on the Quality and Drying Characteristic of Mint Leaves (Mentha spicata L.)
- 3 Inhibitory Activity of Essential Oils of Mentha spicata and Eucalyptus globulus on Biofilms of Streptococcus mutans in an In Vitro Model
- 4 Chemical Composition and Antioxidant Properties of Essential Oils from Peppermint, Native Spearmint and Scotch Spearmint
- 5 Safety and efficacy of a feed additive consisting of an essential oil derived from the aerial parts of Mentha spicata L. (spearmint oil) for use in all animal species (FEFANA asbl)
- 6 Toxic and Non-toxic Plants: Mint
- 7 Reading Labels
- 8 Old Mother Hubbard Classic Minty Fresh Breath
- 9 Veterinary Oral Health Council
- 10 Pet Dental Health is a Reason to Smile
- 11 The Essentials of Essential Oils Around Pets