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We’ve chosen Purina FortiFlora as the best cat supplement on the market because it’s a veterinarian-recommended, widely-used nutritional supplement that’s appropriate for all cats.
Since all cats have different needs, our product roundup includes the best probiotic supplement, urinary tract health supplement, multivitamin, and fish oil.
To choose the best vitamins and supplements on the market, we evaluated the most popular products on Amazon and Chewy, tested the authenticity of their reviews, and read relevant discussions from veterinarians and pet nutrition experts.
Quick Look at Our Top Picks
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Do cats need vitamins and supplements?
Sherry Sanderson, DVM, PhD, of the University of Georgia College of Veterinary Medicine, says that “there are some circumstances where a cat has an underlying condition that may warrant a supplement,” adding that supplements may not help at all due to a lack of testing or proven efficacy. Sanderson says that “many supplements are untested and unproven in veterinary medicine.”
Vitamins supplementation may be necessary for cats with certain conditions.
Some diseases inhibit nutrient absorption, which necessitates vitamin supplementation. Cats with allergies or pregnant cats may benefit from other supplements.
Ultimately, the requirement for cat vitamins and supplements is one that you can only determine on an individual basis. Consult with your veterinarian or a veterinary nutritionist to find the right supplement for your cat.
Types of Vitamins and Supplements
Here’s a quick summary of the types of supplements your cat might need.
Vitamins and Multivitamins
Multivitamins commonly contain B-complex vitamins, vitamin D, vitamin E, vitamin A, and the amino acid taurine. These are naturally present in fresh, raw, or cooked and fortified food, but some cats may require a boost due to excess urination, dietary deficiencies, or nutrient absorption problems. Your vet can help you determine if your cat has these health or dietary problems.
If you determine that your cat needs a multivitamin, decide whether you’ll give them a pill, chewable tablet, powder, or gel. Generally, supplement gels are the most palatable and receive the highest customer ratings, but they tend to contain corn syrup and other sugary ingredients that cats don’t need.
Can you give your cat too much of a vitamin?
Talk to your veterinarian before adding vitamins to your cat’s diet.
Most vitamins are water-soluble and will pass out of your cat’s body and into their litter box, meaning that the biggest problem you’ll encounter is what some describe as “really expensive pee”. You’ve wasted money on vitamins your cat doesn’t need.
Some vitamins, however, remain in the body and can cause toxicity after a period of sustained over-supplementation. These include vitamins A, D, E, and K. These vitamins are fat-soluble, meaning that they can accumulate in the body’s fat stores for a long time.
Omega-3 Fatty Acid Supplements
These supplements can reduce inflammation and promote a healthy skin and coat.
Give your cat omega-3s from animal sources, including fish and krill oil. Fish and krill oil contain the omega-3 fatty acids DHA and EPA, which are easily utilized by the body.
Plant-based omega-3 supplements contain ALA, which is another type of omega-3 fatty acid. ALA must be converted into DHA and EPA before the body can utilize it. While herbivores and omnivores can convert ALA into DHA and EPA, cats can’t.
Probiotics and Digestive Enzymes
Probiotics are live, active microorganisms that benefit the host. They support and fortify the population of friendly microorganisms that already exist in your cat’s body.
A healthy microbiome supports immune health, digestive health, and can reduce inflammation.
Digestive enzymes are similar to probiotics—they’re naturally found within your cat’s body and in fresh food and help the digestive system break down food.
Added digestive enzymes may help cats with reduced pancreatic function, but it’s generally believed that they’re not necessary or helpful for healthy cats.
There’s a supplement or herbal remedy for virtually every condition. Supplements claim to soothe anxiety, reduce the chances of developing feline lower urinary tract disease (FLUTD), and treat other common conditions. It’s impossible to evaluate all of these supplements as a whole, as each one is different and requires individual analysis.
How to Choose the Best Vitamins and Supplements for Your Cat
Do your research.
Because this space is full of products with hard-to-quantify health benefits and often little or no veterinary testing or validation, be diligent in your research. When shopping for the best cat vitamins and supplements, look for products that have a strong reputation and, preferably, clinical testing to back up their benefits.
Beware of fake reviews.
Customer reviews are a great resource for analysis. Authentic ones can tell you a lot about the company and its products. Fake ones tell you something, too.
Before choosing any of the products on the above list of top vitamins and supplements, we checked their listings on FakeSpot to weed out any with suspicious reviews.
Best Cat Supplements on the Market Today
Overall Best Supplement for Cats: Purina Pro Plan Veterinary Diets FortiFlora Probiotic Cat Supplement Review
This best-selling probiotic supplement is well-respected among veterinarians and loved by cat owners.
It’s made with the additive commonly called “natural flavor”, which is made from hydrolyzed animal tissue. This flavor additive is a major component of Temptations treats, giving FortiFlora powder the potent palatability of crushed Temptations.
Each sachet contains 100 million colony forming units (CFUs) of a single species of bacteria—Enterococcus faecium. For supplements, CFUs are unit of measurement for the amount of live microorganisms in a single dose of the supplement. In addition to probiotics, Purina FortiFlora is supplemented with several vitamins and minerals.
This supplement is appropriate for both sick and healthy cats. It’s particularly popular among cats with inflammatory bowel disease or other digestive issues and can help cats with kidney disease to feel better.
- Highly-rated and recommended by veterinarians
- Contains probiotics for overall health
- Supplemented with vitamins, minerals, and taurine
- Highly palatable
- Contains only one probiotic species and relatively low CFUs
Best Multivitamin for Cats: Tomlyn Felovite II Nutritional Gel Cat & Kitten Supplement Review
This popular veterinarian-formulated multivitamin gel is appetizing and packed with vitamins, minerals, and amino acids to support your cat’s overall health. The ingredient list includes supplemental calcium, phosphorus, taurine, vitamin A, and essential fatty acids.
Like many other supplement gels, this is a sugar-packed product with corn syrup and malt syrup leading the ingredient list. Tomlyn claims that it has a “tasty fish flavor”, and customer reviews confirm that it’s appetizing and palatable.
It’s appropriate for all cats, including kittens.
- Contains numerous vitamins, minerals, and amino acids
- Appetizing fish flavor that cats enjoy
- Low price
- Sugar-heavy with corn syrup and malt syrup as the first two ingredients
Best Omega-3 Fish Oil Supplement for Cats: American Journey Wild Alaskan Salmon Oil Liquid Dog & Cat Supplement Review
This fish oil supplement from American Journey comes in an easy-to-use squeeze tube, which helps it avoid the oozing and dripping problems that you’ll often encounter when using pump containers.
The oil is sourced from wild-caught Alaskan salmon. It’s manufactured in the United States and regularly tested to ensure that it meets consumption standards. Customer reviews indicate that this fish oil is palatable and offers all the benefits you’d expect from an omega-3 fatty acid supplement.
- Easy to administer
- An easily absorbed, species-appropriate source of omega-3s
- Some cats hate the taste and smell
Best Probiotic for Cats: Nusentia Probiotic Miracle for Dogs and Cats Review
While our top supplement contained one strain of probiotic bacteria, it’s not necessarily the best probiotic supplement on the market. This supplement has multiple species and a high CFU count for maximum benefit.
The probiotic contains six bacterial species:
- Bifidobacterium animalis lactis
- Lactobacillus acidophilus
- Lactobacillus rhamnosus
- Lactobacillus salivarius
- Lactobacillus plantarum
- Lactobacillus reuteri
Each scoop contains 1 billion CFUs, and this bacteria count is guaranteed for up to one year after the date of manufacture. To increase efficacy, the formula includes inulin, a prebiotic fiber that promotes probiotic activity in the gut.
- Synergized with prebiotics for maximum efficacy
- A well-known and popular supplement
- High CFU count
- Some complain that it’s difficult to scoop the powder out of its jar
Best Urinary Health Supplement for Cats: Animal Nutritional Products UroMAXX Urinary, Kidney & Bladder Dog & Cat Supplement Review
FLUTD is one of the leading cat health problems, so urinary tract health supplements are extremely common. This popular formula contains cranberry extract and glucosamine HCl, which, according to the product label “help nourish and strengthen the urinary tract lining”.
Most customers say that their cat accepted the supplement and many say that it helped to both prevent and treat cystitis and other urinary health issues. The company says it’s utilized by “animal hospitals and veterinary specialists” around the United States.
Unlike other cranberry-based urinary health supplements, this supplement tastes like chicken and has no astringent flavor.
- Many customers say that the supplement treated their cats’ urinary tract conditions or helped to prevent recurrence
- Palatable flavor
- Appears to be safe for all cats
Choosing the Best Supplement for Your Cat
All of the products on the above list are well-respected with a reputation for effectiveness but aren’t necessarily the best choices for you and your cat.
Before choosing any product, ensure that the product suits your needs. Your veterinarian or a veterinary nutritionist can evaluate your cat’s unique situation and help you choose the right product.