STPP (Phosphate)
infoThis concern applies to dogs specifically.
STPP (Phosphate) is an ingredient found in a small number of pet foods for dogs. Based on veterinary research, this ingredient has generally considered low-risk but good to know about. Below, we explain what we found and list the products that include it.
Why it's flagged
An inorganic phosphate additive, commonly used in dental treats for tartar control. Dogs handle inorganic phosphorus better than cats, but it still puts extra load on the kidneys compared to the natural phosphorus in meat.
Sources
- Coltherd et al. 2019, British Journal of Nutrition (plasma P spikes)
- Alexander et al. 2019, British Journal of Nutrition (kidney damage in cats)
- Dobenecker et al. 2018, J Feline Medicine and Surgery
- Laflamme et al. 2020, J Veterinary Internal Medicine (review)
- Stockman 2024, J Feline Medicine and Surgery (no regulatory limit)