Ingredient file // Ingredient
L-Lysine
The biologically active form of the essential amino acid lysine.
Our read // In our catalog
In 1 of every 7 foods we track
Share of foods that list it
14%
360 of the 2,595 foods with an ingredient list on file, from 17 brands. 354 dry dog food, 4 wet dog food, 2 dog food topper.
Each square is 1% of the catalog
Where it sits on the label
Median position 23. 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 87% of foods.
Price per lb
Median of the cheapest bag price across 302 priced foods, 3% above the catalog. The price is the food's, not the ingredient's.
Who leans on it
29%
of the foods that list it are from Blue. 17 brands use it in total.
What it is
Why it turns up in dog food
- Supports growth, tissue repair and collagen formation.
Who uses it
Brands, best sellers and the company it keeps
Top brands, by foods that list it
Plus 7 more brands.
Amazon best sellers that list it
- #1 Blue Life Protection Formula Adult Chicken and Brown Rice Recipe Dry Dog Food
- #4 Hill’s Science Diet ght Small & Mini Chicken Recipe Dry Dog Food
- #5 Blue Life Protection Formula Adult Small Breed Chicken and Brown Rice Recipe Dry Dog Food
- #27 Blue Life Protection Formula Senior Chicken and Brown Rice Recipe Dry Dog Food
- #29 Royal Canin Small Adult Dry Dog Food
- #30 Blue Life Protection Formula Puppy Chicken and Brown Rice Recipe Dry Dog Food
- #35 Blue Life Protection Formula Small Breed Senior Chicken and Brown Rice Recipe Dry Dog Food
- #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
- Chicken Fat 56%
- Natural Flavor 54%
- Flaxseed 38%
- Brown Rice 37%
- Chicken Meal 35%
- Peas 33%
- Brewers Rice 30%
- Oatmeal 29%
- Chicken By-Product Meal 27%
- Chicken 27%
- Dried Plain Beet Pulp 25%
- Corn 22%