Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

3 Food Sources of Thiamine for Cats (Vitamin B1): Vet Reviewed Options

Share

Munchkin cat eating

We all want our cats to be healthy, happy, and with us for as long as possible. That’s why we take them to the vet for checkups, feed them high-quality, protein-filled food, and keep them indoors most of the time.

However, when cats are not fed enough vitamin B1, they can suffer from a thiamine deficiency (the lack of vitamin B1). There are a few foods that will ensure your cat gets the thiamine they need to be healthy and happy. We’ll discuss them and the signs of thiamine deficiency below.

|Important to Note:

“Vitamin B1 is an essential dietary nutrient, and cats must get enough of it in their diets to stay healthy. The vitamin is involved in many processes throughout your cat’s body. Cats require two to four times more thiamine per day than dogs. Feeding your cat a balanced and complete diet is key to their wellbeing.”

divider cats oct 2024

Top 3 Food Sources of Thiamine for Cats

1. Whole Grains

Whole grains are a great source of thiamine for your feline pal. Of course, cats don’t require large portions of whole grains, but you can find them in many cat foods. Some of the most common grains you’ll see in pet food brands include maize, brown rice, and oatmeal.

Although whole grains are a reliable source of thiamine, cats typically shouldn’t get more than 10% of their calories from carbohydrates.1 Therefore, it’s best to avoid carb-heavy cat treats and focus on meals and treats higher in meat-based proteins. Unless your veterinarian determines that your cat has a thiamine deficiency, they will get enough vitamin B1 from high-quality cat food.


2. Pork/Beef/Fish

Pork, beef, and fish are excellent sources of thiamine for your kitty. Several cat food brands use the proteins in their formulations, and you should look for brands that list pork, beef, or fish as the first ingredient. Cats are obligate carnivores and must eat a lot of protein to stay healthy.

If you serve meat or fish, ensure it’s cooked thoroughly. Raw and inadequately cooked fish pose a risk of thiamine deficiency for your cat. This happens because some fish and shellfish’s raw flesh and viscera contain an enzyme (thiaminase) that destroys thiamine (Vitamin B1).

As with anything else you cook and feed your cat, do not add seasonings and spices such as salt, garlic, and onions. Feeding your cat cooked meat without any seasoning is best to prevent an upset stomach or toxic reaction to garlic and onions.

can cats eat pork
Image Credit: WiP-Studio, Shutterstock

3. Legumes

Several legumes can help with your cat’s thiamine levels as well. Legumes are often listed as ingredients in cat food, but if your cat consumes any of the legumes below, ensure they are cooked without seasonings.

Thiamine levels are decreased when legumes are cooked, and it’s better to serve your pet cat food with thiamine because it’s formulated to include the proper amount. However, the legumes below can boost their thiamine levels:

  • Chickpeas
  • Green beans
  • Kidney beans
  • Black beans
  • Lentils
  • Lima beans
  • Peas
  • Soybeans
  • Pinto beans

These are not the only sources of Vitamin B1. It can also be found in other foods like liver, eggs, brewer’s yeast, and asparagus.

divider cats oct 2024

Signs of Thiamine Deficiency in Cats

Now that you know which foods will ensure your cat has enough thiamine to be healthy, we’ll list the signs of a thiamine deficiency below.

  • Ventroflexion: the cat’s neck is bending towards the floor or curling
  • Circling
  • Falling
  • Incoordination
  • Spastic or abnormal gait
  • Dilated pupils
  • Head is tilting
  • Opisthotonos: when the head, neck, and spine arch backward
  • Seizures
  • Stupor

How Is Thiamine Deficiency Treated?

Thiamine deficiency is treated with oral or injected medication if your cat already shows neurological signs. However, providing adequate quantities of thiamine with a diet change is the treatment of choice for this condition.

You can prevent the deficiency from happening by feeding your cat high-quality, protein-filled, balanced and complete cat food. An experienced veterinarian can be a great assistance with this, so don’t hesitate to give a call to one.

Need veterinary advice but can't get to the clinic? Catster recommends PangoVet, our online veterinary service. Talk to a vet online and get the answers and advice you need for your cat without having to leave your living room — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

divider cats oct 2024

Conclusion

Thiamine deficiency is a condition that affects cats and dogs. A lack of vitamin B1 causes severe health issues that can lead to death. If you see any signs of thiamine deficiency in your cat, rush your cat to the emergency clinic immediately. If caught in time, the condition can be treated, but it can be prevented by feeding your cat well-balanced cat food containing thiamine sources like the ones we discussed.


Featured Image Credit: Twinsterphoto, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Ask Dr. Paola – Help! My Momma Cat Is Very Thin! (May 18, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

The Cat Biting Mistakes Most Owners Make (And What Works Instead)

Cat bites sent more than 400,000 people to emergency rooms in the US each year.1 Not scratches. Bites. And the reason they’re so...

Do Cats Cause Schizophrenia? Scientists Find a Link – Here’s What It Means

Being a fierce advocate (and occasional recipient of) mental health support and awareness, the term ‘crazy’ is not one I like to fling...

One in 100 Cats Gets Diabetes – Here’s How to Catch It Early

One in every 100 cats develops diabetes.1 That’s not a rare, unlucky condition reserved for cats with obvious health problems. It’s common enough...

More related

10 Best Foods for Pregnant Cats in 2026 – Reviews & Top Picks

When it comes to feeding a pregnant cat, it’s important to note that pregnant cats need special nutrition—they require extra protein, fat, and...

Ask Dr. Paola – Moving, Pulling Fur Out & Scratching Couch (August 18, 2025)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Does Lavender Calm Cats? Vet-Reviewed Facts & FAQ

Cats that spend time outside have likely come across many different types of plants, flowers, and foliage during their adventures. Some of the...

Horner’s Syndrome in Cats: Our Vet Explains Signs, Diagnosis & Management

The neurologic system is a complex network of nerves, signals, and responses. When something goes wrong or there is an injury within the...

Keep reading

Is Baby’s Breath Toxic to Cats? Vet-Reviewed Houseplants Examined

Baby’s breath is an extremely common flower in arrangements. The small, white flowers are especially useful at bringing out the colors of other flowers and make a good “background” flower for arrangements. Less commonly, you can also find this flower...

Catster_Is Baby’s Breath Toxic to Cats

Can Cats Eat Rosemary? Vet-Verified Potential Benefits & Risks

If you like to cook for your cat, you might be tempted to sprinkle a little rosemary on their chicken. Or maybe you’ve brought home a rosemary plant and noticed that your cat likes to munch on it, which, by...

Can Cats Eat Rosemary

Can Cats Eat Pumpkin? Vet-Reviewed Facts & FAQ

Yes, cats can eat pumpkin. It isn’t suitable as their whole diet or even most of their diet. However, it can be a nice treat or be used in specific circumstances to add nutrients to your cat’s diet. Pumpkin has...

Can Cats Eat Pumpkin

Why One Squinting Eye in Cats Is Never Worth Ignoring

A cat squinting both eyes is usually a sign of contentment. A cat squinting just one eye is a different story. That asymmetry matters more than most cat owners realise, and understanding what’s behind it can make a real difference...

cat with squinted eye

My Cat Makes Weird Noises When Drinking: 6 Vet-Verified Explanations

Are you worried that your cat has an odd way of drinking water? You’re not alone in this thought process. It’s a common question for cat owners, and usually, it’s nothing you need to worry about. Still, you’re probably just...

cat drinking water from bowl in carpet

Can Cats Eat Yams? Vet-Approved Nutrition Facts

Yams are a big part of meals in autumn and winter. As you prepare for holiday dishes, you may be wondering if you can share some of your yams with your cat. Or, if your cat likes to sample food...

Can Cats Eat Yams

Why Is My Cat So Clingy? 5 Vet Reviewed Reasons for This Behavior

Cats are often praised for being incredibly low-maintenance pets. Besides finding food, cats practically do everything on their own, including bathing, going to the bathroom, and relaxing. Despite the normalcy of cats being independent, there are times when they can...

a tabby cat lying on a woman's chest

How to Tell if a Cat Is Microchipped: 4 Vet Approved Signs to Look For

If you find a stray cat with no obvious identification, finding the owner can be challenging. Feral cats typically stay away from people and do not like being handled. Therefore, if a cat approaches you, then it likely isn’t feral....

cat microchip getting scanned at vet

Love Cats? So Do We! Join the Catster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Catster Email Newsletter

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.