Goji Berry

Growers sell ripe goji fruit into a food processing trade. Drying makes the fruit easier to store and ship; processors also turn fresh berries into pulp. A dog food label rarely identifies which form the maker used.^2,3,4

1. 01 // Source Ripe goji fruit Growers harvest the berries for drying or processing into other fruit products.
2. 02 // Process Preserved Most commercial fruit is dried; another route beats and pasteurizes fresh berries into pulp.
3. 03 // Process Sized for mixing Dried berries are sometimes ground into powder, while pulp is homogenized before packaging.
4. 04 // Output Goji berry material Dried fruit, powder or pulp reaches the food maker for addition to a recipe.

1. 01

   Adds fruit solids

   Goji contributes carbohydrate, sugars and other fruit components. At the amounts declared in published dog food formulas, it is too small an addition to supply much of the food's energy or protein.^2,6,7

2. 02

   Supports a label story

   A maker can name the fruit and connect it to antioxidant claims. Using a fraction of a percent keeps it a minor recipe input; that economic reading is an inference from the published formulas.^6,7,8

3. 03

   Adds fruit pigment

   Goji carries carotenoid pigments. They enter the recipe with the berry, but the cited studies did not test whether these small additions change the finished food's appearance or benefit the dog.^3,6,7

How much One published formula lists a minimum of 0.075% goji berry, another lists 0.14%; the dog trial tested purified compounds in capsules rather than whole fruit.^1,6,7

1. Brands say

   Goji berries sharpen a dog's memory

   Outruns the evidence

   Evidence

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

   A 42-day trial gave purified goji compounds or placebo in capsules to kenneled poodles, with 5 dogs per group. The treated groups improved on a memory task, but the trial did not test whole berries in food.¹

2. Brands say

   Goji berries protect a dog's eyesight

   Outruns the evidence

   Evidence

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

   A randomized study gave people with early eye disease 25 g of berries daily for 90 days and measured eye pigment. It measured a human eye outcome, not a canine one, and dog food formulas add only a fraction of a percent of goji berry.^5,6,7,8

3. Brands say

   Goji antioxidants protect dogs from disease

   Outruns the evidence

   Evidence

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

   In the 42-day poodle trial, purified goji compounds changed blood antioxidant markers. Researchers did not test disease prevention or whole berries in food. A marker change does not show that the berry protects dogs from illness.^1,8

4. Brands say

   Goji berries boost a dog's immunity

   Outruns the evidence

   Evidence

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

   The 42-day poodle trial found changes in immune signaling markers after purified compounds were given in capsules. It did not measure infections or immune health, and it cannot show a benefit from whole berry in food.^1,8