Ingredient file // Ingredient
Magnesium Sulfate
An inorganic magnesium salt used as a mineral supplement.
Our read // In our catalog
In 1 of every 17 foods we track
Share of foods that list it
6%
134 of the 2,264 foods we track, from 27 brands. 117 wet dog food, 16 dry dog food, 1 dog food topper.
Each square is 1% of the catalog
Where it sits on the label
Median position 18. 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 18 priced foods, 31% above the catalog. The price is the food's, not the ingredient's.
Who leans on it
14%
of the foods that list it are from Merrick. 27 brands use it in total.
What it is
Why it turns up in dog food
- Provides magnesium, which is involved in energy metabolism and muscle function.
Who uses it
Brands, best sellers and the company it keeps
Top brands, by foods that list it
Plus 17 more brands.
Amazon best sellers that list it
- #58 Purina Pro Plan All Ages Sport Performance 30/20 Chicken & Rice Formula Dry Dog Food
- #98 Open Farm Ancient Grains Front Range Ancient Grains for Dogs - RawMix 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 57%
- Carrots 42%
- Chicken Broth 40%
- Sunflower Oil 31%
- Dried Egg Product 31%
- Natural Flavor 28%
- Pumpkin 25%
- Beef 25%
- Sweet Potatoes 23%
- Guar Gum 20%
- Potatoes 20%
- Potassium Chloride 20%