MCT Oil Used To Support Seizures In Dogs

If your dog has seizures, MCT oil is one nutritional tool worth understanding.

Medium-chain triglycerides have actually been studied in dogs with idiopathic epilepsy, and several canine studies have found reductions in seizure frequency for at least some of the dogs receiving MCT-enriched diets or supplemental MCT oil.

But this is where the internet tends to run off the rails.

MCT oil is not a cure for seizures. Coconut oil is not the same thing as the MCT oil used in the research. And there is no universal spoonful that is appropriate for every seizure dog.

So let's look at what we actually know, what I look for in an MCT oil, and where it may fit into a much bigger seizure-support strategy.

Can MCT Oil Help Dogs With Seizures?

Potentially, yes. Controlled canine studies have found that MCT supplementation can reduce seizure frequency in some dogs with idiopathic epilepsy.

Some dogs respond very well. Some improve modestly. Some do not respond at all.

That makes MCT oil an interesting adjunct to seizure management — not a replacement for diagnosis, appropriate medication or the rest of the dog's nutrition and health picture.

Why MCT Oil Is Being Studied for Canine Epilepsy

MCT stands for medium-chain triglycerides. These fats are handled differently by the body than many longer-chain dietary fats.

Two of the medium-chain fatty acids getting particular attention in epilepsy research are:

• C8 — caprylic or octanoic acid
• C10 — capric or decanoic acid

MCTs can provide the brain with alternative fuel sources, including ketones, but that is probably not the whole story. Researchers have also been investigating effects on brain energy metabolism, mitochondrial function, oxidative stress and neurotransmission.

That matters because research suggests glucose metabolism may be altered in epileptic areas of the brain. Giving the brain additional ways to obtain and use energy is one reason MCTs have become so interesting in both human and canine epilepsy research.

MCT Oil Does Not Mean Your Dog Is on a Ketogenic Diet

Adding MCT oil can increase the availability of medium-chain fatty acids and ketones, but that does not automatically put your dog into the kind of nutritional ketosis associated with a traditional ketogenic diet.

You do not need to turn your dog's bowl into an extreme high-fat ketogenic experiment in order to explore the potential benefits of MCTs.

What Does the Research on MCT Oil and Seizures in Dogs Actually Show?

This is one of the nice things about MCT oil: we have more than anecdotes and Facebook success stories.

MCT-Enriched Diet

A randomized controlled study involving dogs with idiopathic epilepsy found significantly lower seizure frequency while dogs ate an MCT-enriched diet.

Three dogs became seizure-free and several others experienced a reduction of at least 50%.

Supplemental MCT Oil

A later randomized, double-blinded crossover trial studied supplemental MCT oil added to the dogs' existing diets.

Two dogs became seizure-free, three experienced reductions of 50% or more, and another group had smaller reductions.

Not Every Dog Responded

This part is important.

In the supplemental-oil trial, some dogs had no improvement and others actually experienced increased seizure frequency during the MCT period.

That is why I don't tell someone with a seizure dog, "Just add MCT oil."

The evidence is encouraging enough that MCT deserves consideration. It is not evidence that MCT works the same way for every dog.

Another interesting finding: MCT supplementation has also been studied for cognition in dogs with epilepsy. Researchers found improvements in spatial working memory, problem solving and owner-reported trainability during MCT supplementation.

That makes MCT especially interesting when we start thinking about brain health more broadly — not simply counting seizures.

What Is the Best MCT Oil for Dogs With Seizures?

This is one of the searches bringing dog parents to this article, so let's answer it directly.

I would not choose an MCT product simply because the bottle says “MCT oil.”

The supplemental MCT oil used in one of the better canine epilepsy studies contained approximately:

• 50–65% C8 — octanoic/caprylic acid
• 30–50% C10 — decanoic/capric acid

That makes the actual fatty-acid composition of the bottle more meaningful to me than clever marketing on the front label.

What I Look For in an MCT Oil

• A product that clearly identifies its C8 and C10 content
• A simple ingredient list
• No unnecessary flavors, sweeteners or added ingredients
• A manufacturer that clearly identifies what is actually in the bottle
• A product that allows us to calculate how much fat and how many calories we are adding to the dog's existing diet

Is Pure C8 MCT Oil Better for Dogs With Seizures?

You'll see plenty of marketing for pure C8 oil.

I wouldn't make the leap that pure C8 must therefore be the “best” seizure oil. The canine research showing benefit has included both C8 and C10, and decanoic acid — C10 — is itself being investigated for potentially relevant anticonvulsant effects.

In other words, I would rather follow what has actually been studied than assume that removing C10 automatically improves the product.

MCT Oil vs Coconut Oil for Dogs With Seizures

MCT oil and coconut oil are not interchangeable.

Coconut oil naturally contains medium-chain fatty acids, but it also contains a substantial amount of lauric acid and does not provide the same concentrated C8/C10 profile used in the supplemental canine epilepsy research.

If my specific goal is to use the type of MCT supplementation studied for seizure support, I choose an actual MCT oil with the fatty-acid composition identified on the label.

I don't use “coconut oil contains MCTs” as a reason to assume a spoonful of coconut oil is equivalent.

How Much MCT Oil Should I Give a Dog With Seizures?

This is also where the old version of this article needed some correction.

One of the controlled MCT-oil studies calculated supplementation at approximately 9% of the dog's daily metabolic energy requirement. The average amount in that particular research population was around 7 mL daily, divided between two feedings.

Please Don't Turn “7 mL” Into a Universal Dog Dose

The dogs in the study were different sizes and their amounts were individually calculated.

A 9-pound Dachshund and a 75-pound Labrador should obviously not be handed the same bottle instructions simply because both have seizures.

The dog's body size, caloric needs, current food, existing fat intake, digestive tolerance, weight and health history all matter.

MCT oil is also calorie-dense. Those calories need to be counted as part of the diet rather than endlessly added on top of everything else in the bowl.

Start Low and Watch the Dog

Even when we've determined an appropriate eventual amount, I prefer to introduce MCT gradually rather than dump the full amount into the bowl on day one.

Watch for:

• Loose stool or diarrhea
• Nausea or appetite changes
• Abdominal discomfort
• Changes in body weight
• Changes in seizure frequency or pattern
• Changes in recovery after a seizure

Keep a seizure log. If you're changing nutrition, supplements or other variables, document the changes rather than relying on memory three weeks later.

Can Dogs Taking Seizure Medication Also Use MCT Oil?

Many of the dogs in the published MCT studies were already receiving antiseizure medication.

That is important because MCT was being evaluated largely as an add-on nutritional strategy, not as a reason to abruptly discontinue medication.

A small later study has even evaluated an MCT-enriched therapeutic diet in dogs being treated with zonisamide.

Do not reduce or stop phenobarbital, zonisamide, potassium bromide, levetiracetam or another antiseizure medication simply because you have added MCT oil.

Medication changes belong with the veterinarian managing the dog's seizures.

Who Needs More Caution With MCT Oil?

MCT is still a concentrated dietary fat.

I want more thought put into its use when a dog has:

• A history of pancreatitis
• Difficulty tolerating dietary fat
• Chronic diarrhea or significant GI disease
• An already calorie-dense diet
• Obesity or unwanted weight gain
• Multiple diet and supplement changes happening at the same time

The goal isn't to see how many “brain supplements” we can fit into one bowl.

The goal is to build a diet and support plan the individual dog can actually tolerate and benefit from.

Dana's Take: MCT Oil Is One Piece of the Seizure Puzzle

I like MCT oil for seizure dogs because it has actual canine research behind it.

But I don't look at seizures through an MCT-only lens.

When I'm looking at a seizure dog, I may also be looking at the dog's:

• Complete diet and food quality
• Omega-3 intake
• Gut and microbiome health
• Liver support
• Environmental and chemical exposures
• Flea, tick and vaccine history
• Medications and supplement timing
• CBD and other nutritional supports
• Stress and nervous-system patterns
• Seizure timing, frequency and recovery

And no, that doesn't mean every seizure dog needs every one of those things.

Sometimes the smartest plan is adding something. Sometimes it's removing something. And sometimes what a dog needs most is for us to stop changing six things at once so we can actually tell what is helping.

MCT Oil Is Not a Substitute for Finding Out Why Your Dog Is Seizing

A dog having seizures deserves appropriate veterinary diagnostics.

Idiopathic epilepsy is one possible diagnosis, but seizures can also occur with metabolic disease, toxin exposure, structural brain disease and other medical conditions.

If this is your dog's first seizure, the seizures are changing, your dog is having cluster seizures, a seizure lasts several minutes, or recovery is abnormal or prolonged, this is not the time to simply order MCT oil from Amazon and hope for the best.

Start with the dog in front of you.

Frequently Asked Questions About MCT Oil for Dogs With Seizures

Can MCT oil stop seizures in dogs?

MCT oil may help reduce seizure frequency in some dogs with idiopathic epilepsy, but it does not stop seizures in every dog. In published canine trials, some dogs responded substantially while others showed little or no improvement.

What is the best MCT oil for dogs with seizures?

I prefer an MCT oil that clearly identifies its C8 and C10 fatty-acid content. One controlled canine epilepsy study used an oil containing approximately 50–65% C8 and 30–50% C10. I would rather choose based on composition than front-label marketing.

Is C8 or C10 better for canine seizures?

We do not have good evidence showing that pure C8 is universally better for seizure dogs. Canine studies demonstrating benefit have used combinations containing both C8 and C10, and C10 itself has properties of interest in epilepsy research.

Can I use coconut oil instead of MCT oil?

I don't consider them equivalent for this purpose. Coconut oil contains medium-chain fatty acids, but it does not provide the same concentrated C8/C10 profile as the MCT oil used in the supplemental canine epilepsy research.

How much MCT oil should I give my dog for seizures?

There isn't one responsible teaspoon-per-pound rule for every dog. Research amounts have been calculated as a percentage of the dog's daily energy needs. Body size, diet, fat tolerance, health history and total calories should all be considered.

Can MCT oil be given with phenobarbital or zonisamide?

MCT nutritional strategies have been studied in dogs already receiving antiseizure medications, including studies involving dogs treated with phenobarbital and a small study involving zonisamide. MCT should not be used as a reason to stop or alter prescription seizure medication without veterinary supervision.

Can MCT oil cause diarrhea in dogs?

It can. Introducing too much fat too quickly can cause loose stool or other digestive upset. That is one reason I introduce MCT gradually and pay attention to the dog's entire diet rather than treating the oil as a stand-alone supplement.

Does MCT oil put dogs into ketosis?

Not necessarily. MCTs can increase ketone availability, but simply adding MCT oil does not mean a dog is following a traditional ketogenic diet or maintaining nutritional ketosis.

Keep Reading: Seizures Are Bigger Than One Supplement

Seizures in Dogs: Causes, Emergency Care & Natural Support → Start with the bigger picture — diagnosis, nutrition, medication, brain support and the many pieces I consider with a seizure dog. Could Toxin Accumulation Affect a Dog's Seizure Threshold? → Environmental exposures deserve consideration without assuming that every seizure has one simple toxin explanation.

Already Doing “All the Things” and Your Dog Is Still Seizing?

MCT oil may be one useful piece. But if you're already juggling food changes, medication, CBD, supplements, oils, detox ideas and advice from twelve different places, adding one more bottle may not be the answer.

I can help you look at the whole picture and decide what deserves attention, what may be missing and what may simply be creating noise.

Request a Discovery Callback → Explore Membership + Seizure Resources →

Research Behind MCT Oil for Canine Epilepsy

Berk BA, et al. A multicenter randomized controlled trial of medium-chain triglyceride dietary supplementation on epilepsy in dogs.
Journal of Veterinary Internal Medicine — View on PubMed →

Law TH, et al. A randomised trial of a medium-chain TAG diet as treatment for dogs with idiopathic epilepsy.
British Journal of Nutrition — View on PubMed →

Han FY, et al. Dietary medium chain triglycerides for management of epilepsy: New data from human, dog, and rodent studies.
Epilepsia — View on PubMed →

Packer RMA, et al. Medium-chain triglycerides dietary supplement improves cognitive abilities in canine epilepsy.
Epilepsy & Behavior — View on PubMed →

Educational information only. Seizures can have many causes and may require urgent veterinary care. This article is not a diagnosis, emergency treatment plan or instruction to change prescribed antiseizure medication. Individual nutrition and supplement decisions should take the dog's diagnosis, medications, diet and health history into account.