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Ingredient file // Vitamin or mineral

Iodized Salt

Useful minerals, with the final dose unseen

Iodized salt is ordinary salt with a small amount of iodine added. It supplies sodium and chloride, while iodine supports thyroid hormone production. Its place on the ingredient list does not reveal the finished food's mineral levels.

Role in the food Supporting nutrient
What it is
Salt with a measured addition of iodine, mixed throughout for use as a mineral ingredient.
Made from
Mined or evaporated salt and an iodine compound
Main job
Sodium, chloride and iodine
Typical amount
One dog diet used 3 g per kg
Watch for
Dogs needing a measured sodium intake
Not the same as
Plain salt

Straight answer

Is Iodized Salt safe for dogs?

Check the food's minerals, not this name

Iodized salt near the mineral ingredients has a useful job. Its list position cannot tell you the food's sodium or iodine level. Check the nutritional adequacy statement for your dog's life stage. If your dog needs sodium control, get the finished food's sodium figure from the maker.

Why it is in the food
Sodium, chloride and iodine

Our read // In our catalog

In 1 of every 27 foods we track

Share of foods that list it

4%

117 of the 3,204 foods with an ingredient list on file, from 3 brands. 82 dry dog food, 18 frozen dog food, 17 wet dog food.

Each square is 1% of the catalog

Where it sits on the label

Median position 17. In the top five of 0 foods, so it is usually a minor ingredient.

Top five List position, heaviest first

Above the salt

0%

Usually listed after the salt, which caps it at roughly 1% of the recipe in 100% of foods.

Price per lb

Foods with it $3.47
All foods $3.25

Median of the cheapest bag price across 74 priced foods, 7% above the catalog. The price is the food's, not the ingredient's.

Who leans on it

84%

of the foods that list it are from Hill's. 3 brands use it in total.

What it is

How it is made

Salt producers mine rock deposits or evaporate salty water to recover crystals. They refine or grind the salt, then add an iodine compound. The resulting ingredient gives food makers a way to add several minerals together.7,10,11

  1. 01 // Source Salt deposits or brine Producers mine solid salt or recover crystals by evaporating seawater or underground brine.
  2. 02 // Process Refine the crystals Recovered salt is ground or refined before the iodine compound is added.
  3. 03 // Process Mix in iodine A measured iodine compound is mixed in dry or sprayed onto the salt as a solution.
  4. 04 // Output Iodized salt The dry ingredient reaches the food plant with iodine distributed throughout the salt.

What is in it

Composition, dry matter

0.007

% iodine

This is the minimum iodine content in AAFCO's ingredient definition. It does not describe iodine in the finished dog food.

Sodium chloride 95-100%7
Chloride 60.7%10
Sodium 39.3%10

AAFCO sets floors, not batch values: at least 95% sodium chloride, so up to 100%, and at least 0.007% iodine with no stated ceiling. Sodium and chloride shares are for pure sodium chloride.7,10

Why it is in the bag

A small amount doing real mineral work

  1. Main nutrition
  2. Supporting nutrient
  3. Does a job
  4. Mostly filler

Makers add iodized salt to supply sodium, chloride and iodine, which each have their own minimum in AAFCO dog food nutrient profiles, and salt also seasons the food. On labels it typically sits after the main ingredients, near the other minerals. Ingredients are listed by weight, so that means a small amount, but mineral needs are small too, so it is not filler. The label does not show whether the dose is right.7,8,9,10

  1. 01

    Supplies two major minerals

    Salt adds sodium and chloride together. Dog food nutrient profiles set separate minimums for both, so formulators account for their amounts across the whole recipe.8,10

  2. 02

    Adds a little iodine

    Iodization mixes a measured iodine compound into salt. Iodine has its own minimum in dog food nutrient profiles, although other ingredients can supply it too.7,8,11

  3. 03

    Adjusts the taste

    Salt is used for flavor. In a small dog test, sodium chloride on sampling swabs appealed more than untreated swabs; the test did not compare finished foods.3,10

  4. 04

    Uses industrial salt supply

    Mined and evaporated salt is produced at industrial scale. Adding iodine uses measuring equipment and mixers, making this a practical mineral ingredient for manufacturers.10,11

How much A published dog diet contained 3 g of iodized salt per kg of diet; that single recipe does not define a usual amount.5

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.

  1. Brands say

    Added iodine keeps a dog's thyroid working

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    Iodine is needed to make thyroid hormones. In 1 case, a dog fed an unbalanced diet regained normal thyroid hormone levels after changing to an iodine-supplemented food. That does not show a thyroid benefit for dogs already eating enough iodine.2,8

  2. Brands say

    Salt makes dog food taste better

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    In a test with 5 dogs, sodium chloride applied to cotton saliva-sampling swabs appealed more than untreated swabs, but citric acid outperformed it and no food was involved. The result cannot measure a taste benefit from iodized salt in kibble.3

  3. Owners say

    Iodized salt on a bag means high blood pressure

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    In a crossover study of 8 dogs with experimental kidney disease, short-term changes in dietary sodium had no apparent immediate effect on blood pressure. An ingredient listing gives no sodium dose, so it cannot predict a dog's blood pressure.4,6,9

  4. Critics say

    Iodized salt is just filler

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    AAFCO specifies iodine content for this ingredient, and its dog food profiles set separate minimums for sodium, chloride and iodine. Those are nutritional jobs. The ingredient list cannot show whether the finished recipe supplies the right amounts.7,8,9

Straight answers

What owners ask

  1. Q01

    Is it just filler?

    No

    It supplies sodium and chloride, plus added iodine. All 3 appear in dog food nutrient profiles. How much the food needs from iodized salt depends on what its other ingredients supply.7,8

  2. Q02

    Does it mean too much sodium?

    Not necessarily

    Ingredients are listed by weight without their amounts. Other ingredients can supply sodium too. If your dog needs a measured sodium intake, ask the maker for the finished food's sodium level.9

  3. Q03

    Should I add more iodine?

    Not by default

    Judge the whole diet. An iodine-deficient dog improved after a food change, while an experiment in 18 puppies found altered thyroid measures with excess potassium iodide. The label entry alone cannot tell you whether more iodine is needed.1,2,8,9

Who uses it

Brands, best sellers and the company it keeps

Top brands, by foods that list it

  1. Hill's 98 / 116
  2. Lotus 18 / 32
  3. Eukanuba 1 / 35

Foods that list it / all the brand's recipes we track.

Amazon best sellers that list it

  1. #4 Hill’s Science Diet Light Small & Mini Chicken Recipe Dry Dog Food
  2. #6 Hill’s Science Diet Adult Sensitive Stomach & Skin Chicken Recipe Dry Dog Food
  3. #13 Hill’s Science Diet Adult 1-6 Small Bites Chicken & Barley Recipe Dry Dog Food
  4. #21 Hill’s Science Diet Adult 1-6 Chicken & Barley Recipe Dry Dog Food
  5. #24 Hill’s Science Diet Adult Sensitive Stomach & Skin Small & Mini Chicken Recipe Dry Dog Food
  6. #40 Hill’s Science Diet Adult Large Breed Chicken & Barley Recipe Dry Dog Food
  7. #61 Hill’s Science Diet Adult Perfect Weight Chicken Recipe Dry Dog Food
  8. #62 Hill’s Science Diet Adult 7+ Chicken Meal, Barley & 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. Cracked Pearled Barley 62%
  2. Chicken Meal 54%
  3. Chicken 51%
  4. Brewers Rice 49%
  5. Brown Rice 48%
  6. Chicken Fat 47%
  7. Natural Chicken Liver Flavor 44%
  8. Whole Grain Corn 41%
  9. Dried Beet Pulp 33%
  10. Whole Grain Wheat 28%
  11. Corn Protein Meal 27%
  12. Water 26%

On the shelf

Foods that list Iodized Salt

117 foods in our catalog list it. These 60 list it highest on the label.

Hill’s Puppy Chicken & Barley Entrée Wet Dog FoodHill'sHill’s Puppy Chicken & Barley Entrée Wet Dog FoodWet // No. 10 on the labelHill’s Science Diet Puppy Small & Mini Beef & Barley Entrée Wet Dog FoodHill'sHill’s Science Diet Puppy Small & Mini Beef & Barley Entrée Wet Dog FoodWet // No. 11 on the labelLotus Vegetarian Fed Pork Recipe Raw Frozen Dog FoodLotusLotus Vegetarian Fed Pork Recipe Raw Frozen Dog FoodFrozen // No. 12 on the labelLotus Vegetarian Fed Pork Recipe Raw Frozen Dog FoodLotusLotus Vegetarian Fed Pork Recipe Raw Frozen Dog FoodFrozen // No. 12 on the labelHill’s Healthy Advantage Adult Small Bites Chicken & Brown Rice Recipe Dry Dog FoodHill'sHill’s Healthy Advantage Adult Small Bites Chicken & Brown Rice Recipe Dry Dog FoodDry // No. 14 on the labelHill’s Healthy Advantage Adult Chicken & Brown Rice Recipe Dry Dog FoodHill'sHill’s Healthy Advantage Adult Chicken & Brown Rice Recipe Dry Dog FoodDry // No. 14 on the labelHill’s Bioactive Recipe Adult 7+ Small Breed Thrive + Vigor Dry Dog FoodHill'sHill’s Bioactive Recipe Adult 7+ Small Breed Thrive + Vigor Dry Dog FoodDry // No. 17 on the labelHill’s Bioactive Recipe Adult 7+ Thrive + Vigor Dry Dog FoodHill'sHill’s Bioactive Recipe Adult 7+ Thrive + Vigor Dry Dog FoodDry // No. 17 on the label
Show 52 more
Hill’s Science Diet Adult Beef & Barley Entrée Wet Dog FoodHill'sHill’s Science Diet Adult Beef & Barley Entrée Wet Dog FoodWet // No. 11 on the labelHill’s Science Diet Adult Small & Mini Chicken & Barley Entrée Wet Dog FoodHill'sHill’s Science Diet Adult Small & Mini Chicken & Barley Entrée Wet Dog FoodWet // No. 12 on the labelHill’s Adult Chicken & Barley Entrée Wet Dog FoodHill'sHill’s Adult Chicken & Barley Entrée Wet Dog FoodWet // No. 12 on the labelHill’s Science Diet Adult 7+ Turkey & Barley Entrée Wet Dog FoodHill'sHill’s Science Diet Adult 7+ Turkey & Barley Entrée Wet Dog FoodWet // No. 12 on the labelLotus Vegetarian Fed Pork Recipe Raw Frozen Dog FoodLotusLotus Vegetarian Fed Pork Recipe Raw Frozen Dog FoodFrozen // No. 12 on the labelHill’s Science Diet Adult Light Wet Dog FoodHill'sHill’s Science Diet Adult Light Wet Dog FoodWet // No. 13 on the labelHill’s Prescription Diet d/d Salmon Skin Care Wet Dog FoodHill'sHill’s Prescription Diet d/d Salmon Skin Care Wet Dog FoodWet // No. 13 on the labelLotus Pasture Raised Venison Recipe Raw Frozen Dog FoodLotusLotus Pasture Raised Venison Recipe Raw Frozen Dog FoodFrozen // No. 13 on the labelLotus Pasture Raised Venison Recipe Raw Frozen Dog FoodLotusLotus Pasture Raised Venison Recipe Raw Frozen Dog FoodFrozen // No. 13 on the labelLotus Pasture Raised Venison Recipe Raw Frozen Dog FoodLotusLotus Pasture Raised Venison Recipe Raw Frozen Dog FoodFrozen // No. 13 on the labelLotus Free Range Turkey Recipe Raw Frozen Dog FoodLotusLotus Free Range Turkey Recipe Raw Frozen Dog FoodFrozen // No. 13 on the labelLotus Free Range Turkey Recipe Raw Frozen Dog FoodLotusLotus Free Range Turkey Recipe Raw Frozen Dog FoodFrozen // No. 13 on the labelLotus Free Range Turkey Recipe Raw Frozen Dog FoodLotusLotus Free Range Turkey Recipe Raw Frozen Dog FoodFrozen // No. 13 on the labelLotus Pasture Raised Lamb Recipe Raw Frozen Dog FoodLotusLotus Pasture Raised Lamb Recipe Raw Frozen Dog FoodFrozen // No. 13 on the labelLotus Pasture Raised Lamb Recipe Raw Frozen Dog FoodLotusLotus Pasture Raised Lamb Recipe Raw Frozen Dog FoodFrozen // No. 13 on the labelLotus Pasture Raised Lamb Recipe Raw Frozen Dog FoodLotusLotus Pasture Raised Lamb Recipe Raw Frozen Dog FoodFrozen // No. 13 on the labelLotus Grass-Fed Beef Recipe Raw Frozen Dog FoodLotusLotus Grass-Fed Beef Recipe Raw Frozen Dog FoodFrozen // No. 13 on the labelLotus Grass-Fed Beef Recipe Raw Frozen Dog FoodLotusLotus Grass-Fed Beef Recipe Raw Frozen Dog FoodFrozen // No. 13 on the labelLotus Grass-Fed Beef Recipe Raw Frozen Dog FoodLotusLotus Grass-Fed Beef Recipe Raw Frozen Dog FoodFrozen // No. 13 on the labelHill’s Prescription Diet i/d Sensitive Digestive Care Rice & Egg Formula Dry Dog FoodHill'sHill’s Prescription Diet i/d Sensitive Digestive Care Rice & Egg Formula Dry Dog FoodDry // No. 13 on the labelHill’s Hill’s Science Diet Adult Salmon & Barley Entrée Wet Dog FoodHill'sHill’s Hill’s Science Diet Adult Salmon & Barley Entrée Wet Dog FoodWet // No. 14 on the labelLotus Free Range Chicken Recipe Raw Frozen Dog FoodLotusLotus Free Range Chicken Recipe Raw Frozen Dog FoodFrozen // No. 14 on the labelLotus Free Range Chicken Recipe Raw Frozen Dog FoodLotusLotus Free Range Chicken Recipe Raw Frozen Dog FoodFrozen // No. 14 on the labelLotus Free Range Chicken Recipe Raw Frozen Dog FoodLotusLotus Free Range Chicken Recipe Raw Frozen Dog FoodFrozen // No. 14 on the labelHill’s Prescription Diet d/d Skin/Food Sensitivities Potato & Salmon Formula Grain-Free Dry Dog FoodHill'sHill’s Prescription Diet d/d Skin/Food Sensitivities Potato & Salmon Formula Grain-Free Dry Dog FoodDry // No. 14 on the labelHill’s Science Diet Puppy Large Breed Chicken Meal & Oats Recipe Dry Dog FoodHill'sHill’s Science Diet Puppy Large Breed Chicken Meal & Oats Recipe Dry Dog FoodDry // No. 14 on the labelHill’s Science Diet Adult 6+ Large Breed Chicken & Brown Rice Recipe No Corn, Wheat, Soy Dry Dog FoodHill'sHill’s Science Diet Adult 6+ Large Breed Chicken & Brown Rice Recipe No Corn, Wheat, Soy Dry Dog FoodDry // No. 14 on the labelHill’s Science Diet Adult Large Breed Chicken & Brown Rice Recipe No Corn, Wheat, Soy Dry Dog FoodHill'sHill’s Science Diet Adult Large Breed Chicken & Brown Rice Recipe No Corn, Wheat, Soy Dry Dog FoodDry // No. 14 on the labelHill’s Science Diet Adult 1-6 Chicken & Brown Rice Recipe No Corn, Wheat, Soy Dry Dog FoodHill'sHill’s Science Diet Adult 1-6 Chicken & Brown Rice Recipe No Corn, Wheat, Soy Dry Dog FoodDry // No. 14 on the labelHill’s Science Diet Adult Small Bites No Corn, Wheat, Soy Chicken & Brown Rice Recipe Dry Dog FoodHill'sHill’s Science Diet Adult Small Bites No Corn, Wheat, Soy Chicken & Brown Rice Recipe Dry Dog FoodDry // No. 14 on the labelHill’s Science Diet Puppy Chicken & Brown Rice Recipe No Corn, Wheat, Soy Dry Dog FoodHill'sHill’s Science Diet Puppy Chicken & Brown Rice Recipe No Corn, Wheat, Soy Dry Dog FoodDry // No. 15 on the labelHill’s Healthy Advantage Puppy Large Breed Chicken & Brown Rice Recipe Dry Dog FoodHill'sHill’s Healthy Advantage Puppy Large Breed Chicken & Brown Rice Recipe Dry Dog FoodDry // No. 15 on the labelHill’s Healthy Advantage Adult Oral+ Chicken Flavor Dry Dog FoodHill'sHill’s Healthy Advantage Adult Oral+ Chicken Flavor Dry Dog FoodDry // No. 15 on the labelHill’s Prescription Diet d/d Skin/Food Sensitivities Potato & Venison Formula Grain-Free Dry Dog FoodHill'sHill’s Prescription Diet d/d Skin/Food Sensitivities Potato & Venison Formula Grain-Free Dry Dog FoodDry // No. 15 on the labelHill’s Science Diet Adult 7+ Chicken & Brown Rice Recipe No Corn, Wheat, Soy Dry Dog FoodHill'sHill’s Science Diet Adult 7+ Chicken & Brown Rice Recipe No Corn, Wheat, Soy Dry Dog FoodDry // No. 15 on the labelHill’s Science Diet Puppy Small Bites Chicken & Barley Recipe Dry Dog FoodHill'sHill’s Science Diet Puppy Small Bites Chicken & Barley Recipe Dry Dog FoodDry // No. 16 on the labelHill’s Prescription Diet j/d Joint Care Small Bites Chicken Flavor Dry Dog FoodHill'sHill’s Prescription Diet j/d Joint Care Small Bites Chicken Flavor Dry Dog FoodDry // No. 16 on the labelHill’s Prescription Diet Derm Complete Original Flavor Dry Dog FoodHill'sHill’s Prescription Diet Derm Complete Original Flavor Dry Dog FoodDry // No. 16 on the labelHill’s Science Diet Adult Small Paws Lamb Meal & Brown Rice Recipe Dry Dog FoodHill'sHill’s Science Diet Adult Small Paws Lamb Meal & Brown Rice Recipe Dry Dog FoodDry // No. 16 on the labelHill’s Science Diet Adult 1-6 Small Bites Lamb Meal & Brown Rice Recipe Dry Dog FoodHill'sHill’s Science Diet Adult 1-6 Small Bites Lamb Meal & Brown Rice Recipe Dry Dog FoodDry // No. 16 on the labelHill’s Science Diet Adult 1-6 Lamb Meal & Brown Rice Recipe Dry Dog FoodHill'sHill’s Science Diet Adult 1-6 Lamb Meal & Brown Rice Recipe Dry Dog FoodDry // No. 16 on the labelHill’s Science Diet Puppy Chicken Meal & Barley Recipe Dry Dog FoodHill'sHill’s Science Diet Puppy Chicken Meal & Barley Recipe Dry Dog FoodDry // No. 16 on the labelHill’s Science Diet Adult Large Breed Lamb Meal & Brown Rice Recipe Dry Dog FoodHill'sHill’s Science Diet Adult Large Breed Lamb Meal & Brown Rice Recipe Dry Dog FoodDry // No. 16 on the labelHill’s Science Diet Adult Sensitive Stomach & Skin Chicken Recipe Dry Dog FoodHill'sHill’s Science Diet Adult Sensitive Stomach & Skin Chicken Recipe Dry Dog FoodDry // No. 17 on the labelHill’s Science Diet Adult 7+ Chicken Meal, Barley & Rice Recipe Dry Dog FoodHill'sHill’s Science Diet Adult 7+ Chicken Meal, Barley & Rice Recipe Dry Dog FoodDry // No. 17 on the labelHill’s Prescription Diet z/d Hydrolyzed Chicken Flavor Wet Dog FoodHill'sHill’s Prescription Diet z/d Hydrolyzed Chicken Flavor Wet Dog FoodWet // No. 17 on the labelHill’s Science Diet Adult 7+ Small & Mini Chicken & Barley Entrée Wet Dog FoodHill'sHill’s Science Diet Adult 7+ Small & Mini Chicken & Barley Entrée Wet Dog FoodWet // No. 17 on the labelHill’s Science Diet Adult Sensitive Stomach & Skin Chicken & Barley Recipe Dry Dog FoodHill'sHill’s Science Diet Adult Sensitive Stomach & Skin Chicken & Barley Recipe Dry Dog FoodDry // No. 17 on the labelHill’s Science Diet Adult Sensitive Stomach & Skin Salmon & Brown Rice Recipe Dry Dog FoodHill'sHill’s Science Diet Adult Sensitive Stomach & Skin Salmon & Brown Rice Recipe Dry Dog FoodDry // No. 17 on the labelHill’s Bioactive Recipe Adult 6+ Large Breed Thrive + Vigor Dry Dog FoodHill'sHill’s Bioactive Recipe Adult 6+ Large Breed Thrive + Vigor Dry Dog FoodDry // No. 17 on the labelHill’s Healthy Advantage Puppy Chicken & Brown Rice Recipe Dry Dog FoodHill'sHill’s Healthy Advantage Puppy Chicken & Brown Rice Recipe Dry Dog FoodDry // No. 17 on the labelHill’s Prescription Diet c/d Multicare Urinary Care Chicken Flavor Dry Dog FoodHill'sHill’s Prescription Diet c/d Multicare Urinary Care Chicken Flavor Dry Dog FoodDry // No. 17 on the label

Sources

What we read

Checked October 1, 2026.

  1. 1 Morphologic Changes in the Thyroid Glands of Puppies Fed a High-Iodine Commercial Diet International Journal of Applied Research in Veterinary Medicine, 2003 // Journal
  2. 2 Case Report: Diet-associated iodine-deficiency goitrous hypothyroidism in a dog: a longitudinal clinical, endocrine, and ultrasonographic evaluation Frontiers in Veterinary Science, 2026 // Journal
  3. 3 Serial collection method of dog saliva: Effects of different chemical stimulants on behaviour, volume and saliva composition Open Veterinary Journal, 2018 // Journal
  4. 4 Effects of dietary sodium intake on blood pressure measurements in partially nephrectomized dogs American Journal of Veterinary Research, 1994 // Journal
  5. 5 Effect of dietary mannanoligosaccharide supplementation on nutrient digestibility, hindgut fermentation, immune response and antioxidant indices in dogs Journal of Animal Science and Technology, 2017 // Journal
  6. 6 ACVIM consensus statement: Guidelines for the identification, evaluation, and management of systemic hypertension in dogs and cats Journal of Veterinary Internal Medicine, 2018 // Journal
  7. 7 Official Feed Terms, Common or Usual Ingredient Names and Ingredient Definitions AAFCO, 2025 // Regulator
  8. 8 AAFCO Dog Food Nutrient Profiles AAFCO, 2013 // Regulator
  9. 9 Reading Labels AAFCO, n.d. // Regulator
  10. 10 Mineral Resource of the Month: Salt U.S. Geological Survey Mineral Commodities Team, 2018 // Government
  11. 11 Elimination of iodine deficiency disorders: a manual for health workers World Health Organization, 2008 // Government
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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