Moderate riskPenalizedDogs and cats
Sodium metabisulfite
Also labeled as
sulfur dioxidesodium bisulfite
Why it matters
Sulfite preservative that destroys thiamine (vitamin B1). Thiamine deficiency from sulfite-preserved meat has caused documented neurological disease in cats and dogs.
How PawScore treats it
Foods containing Sodium metabisulfite are penalized when we grade the label. We don't publish the exact numeric weights so scores stay honest as the rubric evolves.