Dried Sweet Potatoes

Sweet potatoes are grown mainly for food, but roots also enter animal feed. Processors dry the starchy roots to make a material that stores and ships with much less water.^3,4

1. 01 // Source Sweet potato roots Harvested storage roots supply the starchy material; roots directed away from food sales also enter feed.
2. 02 // Process Cleaned and cut Processors clean the roots, then shred or slice them into smaller pieces for drying.
3. 03 // Process Dried Sun or hot air removes water from the cut roots before storage or grinding.
4. 04 // Output Pieces or flour The dried roots arrive as pieces or ground flour that manufacturers mix into kibble.

1. 01

   Supplies starch energy

   Dehydrated sweet potato is mostly starch. Cooking makes more of that starch accessible to digestion, so the root chiefly adds energy to the finished food.^3,4

2. 02

   Replaces cereal starch

   Manufacturers use sweet potato in recipes built without grain. The substitution changes the starch source and the label, but the tested diets do not show a health advantage.^1,3

3. 03

   Stores as dry flour

   Drying removes water before storage and shipping. Feedipedia reports that fresh sweet potato historically struggled to compete with imported grain on cost once its water was counted.^3,4

How much A commercial dog diet trial listed sweet potato but did not publish its percentage, so a usual recipe amount is unknown.¹

1. Brands say

   Sweet potato supplies useful energy

   Evidence

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

   Feedipedia's dehydrated tuber samples averaged 73.5% starch on a dry matter basis. Starch supplies calories, while crude protein averaged only 4.6%. Energy is this ingredient's main nutritional job.³

2. Brands say

   Sweet potato keeps blood sugar steady

   Outruns the evidence

   Evidence

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

   In a 15-dog crossover, the sweet potato diet produced the smallest glucose response. It also contained 25% starch against about 28% in the other diets. The trial cannot credit sweet potato alone and included no diabetic dogs.¹

3. Brands say

   Its fiber improves gut health

   Outruns the evidence

   Evidence

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

   Dehydrated tubers contain fiber, with NDF ranging from 5.2 to 15.7% across Feedipedia samples. That composition does not show a gut health benefit in dogs eating a finished food.³

4. Brands say

   Beta carotene protects eyesight and immunity

   Outruns the evidence

   Evidence

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

   A study of 10 orange sweet potato clones found that drying method changed beta carotene retention. It measured roots, not eye or immune outcomes in dogs. The ingredient name does not reveal the root's flesh color.^2,4

5. Owners say

   Dried sweet potatoes cause heart disease

   Outruns the evidence

   Evidence

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

   FDA reviewed food labels named in canine DCM reports. Peas or lentils appeared in 93% of reported products; a far smaller share contained potatoes, including sweet potatoes. Those reports cannot show that this ingredient causes DCM.⁵