Purina one : metabolism

Overall Score: 67/100

Ingredients

turkey (protein)
chicken by-product meal (source of glucosamine) (protein)
corn gluten meal (carbohydrate)
soy flour (carbohydrate)
rice flour (other)
whole grain corn (other)
soy protein isolate (other)
soybean hulls (other)
dried yeast (other)
cellulose (fiber)
beef fat naturally preserved with vitamin e (protein)
essential nutrients and other ingredients: minerals (phosphoric acid, calcium carbonate, salt, potassium chloride, zinc sulfate, ferrous sulfate, manganese sulfate, copper sulfate, calcium iodate, sodium selenite) (other)
liver flavor (other)
caramel color (additive)
amino acids (l-lysine monohydrochloride, l-carnitine) (other)
vitamins (choline, vitamin e, vitamin b-3, vitamin a, vitamin b-5, vitamin b-1, vitamin b-2, vitamin b-12, vitamin b-6, folic acid, vitamin d-3, vitamin b-7, vitamin k) (other)
dried carrots (other)
dried peas (carbohydrate)
taurine (additive)

Corn Gluten Meal (medium concern): Primarily used as an inexpensive plant-based protein booster that can inflate the protein percentage on guaranteed analysis without providing the complete amino acid profile of animal proteins. Its presence in large quantities may indicate the manufacturer is supplementing with cheap protein instead of using more meat.
Soy (medium concern): Soy is a common allergen in dogs and cats. It contains phytoestrogens that may affect hormonal balance, though the clinical significance in pets is not fully established. Often used as an inexpensive protein and carbohydrate filler. Most soy in pet food is genetically modified.
Caramel Color (high concern): Certain classes of caramel color (Class III and IV, produced with ammonia or ammonia-sulfite processes) contain 4-methylimidazole (4-MEI), which has been classified as 'possibly carcinogenic to humans' (Group 2B) by IARC. California's Proposition 65 lists 4-MEI as a carcinogen. Like other color additives, it provides no nutritional benefit to pets.
Peas (low concern): Peas and other legumes have been associated with the FDA investigation into a potential link between grain-free diets high in legumes and dilated cardiomyopathy (DCM) in dogs. While a definitive causal relationship has not been established, the FDA continues to investigate. Peas are frequently used in grain-free formulations as a primary carbohydrate and protein source.

Dry food, with grains, for the adult life stage.