Propylene glycol is a controversial additive used to help preserve the moisture content in many dog foods.
You may already recognize this chemical by its more “infamous” use: as the key component in newer automotive antifreeze.
However, propylene glycol is considerably safer (less toxic) than its far more dangerous cousin — ethylene glycol.
Yet because of its proven ability to cause a serious type of blood disease — Heinz body anemia — propylene glycol has been banned by the FDA for use in cat food.
However, it can still be used to make dog food.
The Bottom Line
No matter how safe propylene glycol may seem, it’s the continuous, day-after-day feeding of this controversial chemical that worries me.
And if you love your dog as much as I love Bailey and Molly, long term use should worry you, too.
Bottom line? Avoid feeding any dog food that contains propylene glycol.