MSG is not listed as a toxin by animal poison control, and the amount used to season food is not a poisoning risk for a dog. What matters is that it is a sodium salt: a large quantity contributes to the same sodium load that makes very salty food a problem for dogs.
Source-backed guidance. Not individualized veterinary advice.(more)
Compiled from veterinary poison-control and medical references, including the ASPCA Animal Poison Control Center, Pet Poison Helpline, and Merck Veterinary Manual.
Part of our guide to Can Dogs Eat Salad Dressing? Italian, Ranch, Caesar and Blue Cheese.
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Why MSG needs caution
Monosodium glutamate is the sodium salt of glutamic acid, an amino acid already present in ordinary food. Neither the ASPCA nor Pet Poison Helpline lists MSG among the substances toxic to dogs. The real consideration is sodium: dogs need far less than people, and the ASPCA notes that excessive salt causes increased thirst and urination and, in large amounts, tremors and seizures.
Part of the Onion Powder guide
For related dog-safety questions and product-by-product answers, see the complete onion powder guide.
The seasoned food is usually the bigger problem
MSG rarely arrives on its own. It turns up in takeaway, instant noodles, gravy granules, crisps, and seasoning blends, and those products routinely also contain onion and garlic powder. Allium powders damage canine red blood cells and are a genuine toxicity, unlike the MSG beside them on the label. When a dog raids seasoned leftovers, the onion and garlic content is what your vet will want to know about.
Signs to watch for
Increased thirst and urination, upset stomach or vomiting; after a large sodium load, wobbliness or tremors
Related items
Check the exact item or ingredient before assuming two similar exposures carry the same risk.
What to do next
Leave fresh water down and never restrict it, since sudden water restriction after a salt load is itself dangerous. Call your vet if a large amount of powder was eaten or if your dog seems unsteady.
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A closer look at msg
Monosodium glutamate is the sodium salt of glutamic acid, an amino acid already present in ordinary food. Neither the ASPCA nor Pet Poison Helpline lists MSG among the substances toxic to dogs. The real consideration is sodium: dogs need far less than people, and the ASPCA notes that excessive salt causes increased thirst and urination and, in large amounts, tremors and seizures. The details below use the specific facts for this exposure, rather than treating it like every other food question.
1. Start with the exact exposure
For a closely related comparison, read Onion Powder. No toxic dose has been published for dogs, because MSG is not treated as a toxin. Seasoning-level amounts in a piece of takeaway are not the issue. A dog that ate a large quantity of the pure powder is really a salt-load question, and that is worth a call.
2. Use the facts to decide whether to monitor or call
Another helpful reference is Garlic Powder. Yes, for a lick of seasoned food. Make sure fresh water is freely available and watch for stomach upset. If your dog ate a large amount of pure MSG powder, is drinking or urinating far more than usual, or shows wobbliness or tremors. Also call sooner for a dog with heart or kidney disease.
3. If the details are uncertain
Follow the first 10 minutes guide. Leave fresh water down and never restrict it, since sudden water restriction after a salt load is itself dangerous. Call your vet if a large amount of powder was eaten or if your dog seems unsteady.
FAQ
No toxic dose has been published for dogs, because MSG is not treated as a toxin. Seasoning-level amounts in a piece of takeaway are not the issue. A dog that ate a large quantity of the pure powder is really a salt-load question, and that is worth a call.
Yes, for a lick of seasoned food. Make sure fresh water is freely available and watch for stomach upset.
If your dog ate a large amount of pure MSG powder, is drinking or urinating far more than usual, or shows wobbliness or tremors. Also call sooner for a dog with heart or kidney disease.
MSG is not a standard pet-food additive, though glutamates occur naturally in the palatants and protein hydrolysates used to make food taste good. Nothing about that is a toxicity, and a complete commercial diet is formulated to keep sodium in an appropriate range.
- ASPCA APCC, people foods to avoid feeding your pets (salt). MSG itself is not listed as a toxin by the ASPCA APCC or Pet Poison Helpline
- ASPCA Animal Poison Control: people foods to avoid feeding your pets
- Merck Veterinary Manual: food hazards