Ingredient file // Ingredient
Ascorbic Acid
(Source of Vitamin C.)
Our read // In our catalog
In 1 of every 19 foods we track
Share of foods that list it
5%
130 of the 2,533 foods with an ingredient list on file, from 18 brands. 112 dry dog food, 11 wet dog food, 4 dog food topper.
Each square is 1% of the catalog
Where it sits on the label
Median position 34. 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 93% of foods.
Price per lb
Median of the cheapest bag price across 95 priced foods, 5% below the catalog. The price is the food's, not the ingredient's.
Who leans on it
33%
of the foods that list it are from Wellness. 18 brands use it in total.
What it is
Why it turns up in dog food
- Vitamin C acts as an antioxidant and helps preserve the food. Dogs make their own vitamin C, so dietary vitamin C is a supplement rather than a requirement.
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
- #42 Iams Adult Large Breed Dry Dog Food
- #57 Wellness Complete Health Deboned Chicken & Oatmeal Dry Dog Food
- #76 Nutro Natural Choice Adult Chicken & Brown Rice 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
- Flaxseed 66%
- Chicken Fat 55%
- Chicken Meal 47%
- Peas 45%
- Dried Plain Beet Pulp 42%
- Chicken 42%
- Natural Flavor 33%
- Lentils 23%
- Barley 22%
- Oatmeal 22%
- Tomato Pomace 21%
- Canola Oil 20%