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Ingredient file

Sodium Selenite

An inorganic selenium salt used as a trace mineral supplement.

Our read // In our catalog

In 1 of every 3 foods we track

Share of foods that list it

31%

807 of the 2,595 foods with an ingredient list on file, from 45 brands. 607 dry dog food, 167 wet dog food, 17 frozen dog food.

Each square is 1% of the catalog

Where it sits on the label

Median position 36. In the top five of 0 foods, so it is usually a minor ingredient.

Top five List position, heaviest first

Above the salt

2%

Usually listed after the salt, which caps it at roughly 1% of the recipe in 98% of foods.

Price per lb

Foods with it $2.87
All foods $3.23

Median of the cheapest bag price across 548 priced foods, 11% below the catalog. The price is the food's, not the ingredient's.

Who leans on it

18%

of the foods that list it are from Blue. 45 brands use it in total.

What it is

Why it turns up in dog food

  • Supplies selenium for the antioxidant enzymes that protect cells, and for thyroid hormone function. Used in very small controlled amounts.

Who uses it

Brands, best sellers and the company it keeps

Top brands, by foods that list it

  1. Blue 149
  2. Wellness 83
  3. Nulo 76
  4. Stella & Chewy's 65
  5. Nutro 48
  6. Fromm 36
  7. Bil-Jac 30
  8. Diamond 30
  9. Earthborn Holistic 24
  10. Taste of the Wild 20

Plus 35 more brands.

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. #7 Stella & Chewy’s Marie’s Magical Dinner Dust Cage-Free Chicken Recipe Freeze-Dried Raw Dog Food Topper
  4. #8 Diamond Naturals Skin & Coat Formula All Life Stages Salmon & Potato Formula Dry Dog Food
  5. #12 Pedigree Adult Grilled Steak & Vegetable Flavor Dry Dog Food
  6. #17 Taste of the Wild High Prairie Canine Recipe with Roasted Bison & Roasted Venison Dry Dog Food
  7. #22 Cesar Filet Mignon Flavor & Spring Vegetables Garnish Dry Dog Food
  8. #27 Blue Life Protection Formula Senior Chicken and Brown Rice 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. Chicken 42%
  2. Flaxseed 40%
  3. Peas 39%
  4. Chicken Fat 38%
  5. Chicken Meal 35%
  6. Natural Flavor 33%
  7. Oatmeal 26%
  8. Brown Rice 23%
  9. Barley 21%
  10. Dried Plain Beet Pulp 19%
  11. Potatoes 17%
  12. Lentils 16%
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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