Like humans, dogs need a nutritious diet to stay fit and healthy. That’s why so many pet owners spend hours researching brands and learning how to choose the best food for their canine. 

Dog food labels typically list ingredients and mineral content, including magnesium. But is magnesium good for dogs and how much should your canine be consuming? Keep reading this handy ‘magnesium for dogs’ guide to find out more, including:

 

While it’s common to discuss the best plant-based food for dogs or to seek out low-fat dog foods for an overweight canine, microminerals such as magnesium often get overlooked.

Magnesium is vital to your pet’s diet, however, playing a role in cognitive function, metabolism, cardiovascular function, nerve function and more. In fact, your dog needs to consume magnesium as part of their daily diet to avoid a magnesium deficiency. 

As with many other minerals in a dog’s body, like calcium, phosphorus and iron, magnesium is key to strong and healthy bones. In fact, magnesium is the third most common mineral in a dog’s bones after calcium and phosphorus. Magnesium also helps with muscle function, including keeping a dog's heart healthy.

Minerals such as magnesium are an important component of red blood cells. Magnesium also helps with the absorption other minerals, including potassium, zinc, and calcium.

Magnesium for dogs is essential. This is because dogs can’t produce this micromineral on their own. Dietary support is therefore required to ensure your pet stays happy, energetic, affectionate, muscular, healthy and fun loving. Magnesium (Mg) might just seem like a word on the back of a dog food packet, but it can do so many wonderful things.

Here’s why magnesium is a must for your canine:

Magnesium for dogs can be found in a wide range of food sources that are safe for dogs to eat. These include:

While magnesium for dogs is essential, they don’t need very much to stay healthy. According to the Association of American Feed Control Officials (AAFCO), an organization that creates nutrient profiles for dogs, magnesium should comprise 0.04% of your dog’s dry-matter died. Dry matter refers to dog food that’s had all moisture content removed.

This equates to about one milligram of magnesium per day.

If in doubt, always contact your veterinarian to avoid a magnesium deficiency in your pet, or (in rare cases) hypermagnesemia — a magnesium overdose.

The right magnesium dosage for dogs is important. A lack of this nutrient can lead to a magnesium deficiency known as hypomagnesemia. This is rare, usually occurring in seriously ill dogs. But it’s important to be aware of the signs, especially if you’ve noticed a distinctive change in your dog’s appearance, energy levels or personality. 

While there are few obvious symptoms of magnesium deficiency, they may include:

Magnesium may also cause a deficiency in other minerals, primarily calcium and potassium.

Magnesium deficiency may also increase the risk of heart attack. One study involving 13 Beagles fed a low-magnesium diet found that a higher volume of heart muscle tissue died in deficient dogs than dogs fed adequate amounts of magnesium.

The magnesium-deficient Beagles also showed signs of behavioral issues like excessive barking and restlessness.

A magnesium supplement for dogs tends to be the treatment option of choice. This can be given orally or intravenously. Magnesium-deficient dogs may also require calcium and potassium supplements to treat other nutritional deficiencies.

Magnesium citrate for dogs is a chemical compound consisting of magnesium and citric acid. This is often used in pet products and supplements as a source of magnesium and can help dogs with low magnesium levels.

Is magnesium bad for dogs? Only in certain cases. Excess magnesium in a dog’s body is known as hypermagnesemia. This is incredibly rare and occurs after a dog has ingested a substance containing high levels of magnesium chloride (like deicing chemicals). Hypermagnesemia can also happen if a dog is receiving an IV and has kidney failure, making them unable to absorb minerals.

Possible symptoms of magnesium overdose in dogs include:

*Cardiac arrest may occur when a dog’s magnesium levels are very high. Contact your vet immediately if your dog is showing signs of hypermagnesemia or respiratory distress.

If you’re worried about accidentally giving your dog too much magnesium, don’t fret. Most dogs tolerate magnesium well and any excess magnesium will pass through the urine of a dog with healthy kidneys. A dog with kidney disease, however, should not be given a magnesium supplement for dogs. This is because their kidneys can’t dispose of it, which could quickly lead to an overdose. 

Always consult your vet before giving your dog magnesium supplements. It’s also worth taking out pet insurance and Wag! Wellness to cover your pet’s routine healthcare routines.

Magnesium supplements for healthy dogs aren’t necessary if they’re getting enough magnesium in their diet, according to Dr. Callum Turner DVM, veterinary consultant with Wag!

A magnesium supplement for dogs shouldn’t be necessary if your canine is healthy. However, a supplement can benefit dogs with certain severe or chronic health conditions, including diabetes, epilepsy and heart disease. Malnourished dogs may also be given magnesium supplements to help with recovery.

The authors of a 2017 pilot study on magnesium levels on guide dogs and guide dog candidates also recommend supplements for:

Even if your dog falls into one of these categories, always consult your vet before offering a magnesium supplement for dogs to your canine.

Currently, no studies have investigated whether magnesium can help with anxiety in dogs. However, the same 2017 pilot study we mentioned earlier found that stress and environmental factors — like temperature, atmospheric pressure, and physical exertion — can affect a dog's magnesium levels.

The study found that magnesium levels:

All dogs in the study were fed the same food, which means the fluctuations in magnesium levels weren't caused by their diet.

If any behavioral changes were observed as a result of magnesium intake, the authors didn't comment on them in the study. More research is needed to confirm how magnesium goes hand in paw with a dog's stress levels.