We’ve chosen Purina Pro Plan Veterinary Diets FortiFlora Probiotic Cat Supplement 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.
At a Glance: Our Top Picks for Best Cat Vitamins and Supplements
Want a quick look at the products reviewed in this article? In the comparison table below, we’ve highlighted some of the most important features of each product. You’ll find more detailed information about each product later in the article.
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.
Want more information? Read our complete guide to the best probiotics for 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
Want more information? Read our complete guide to the best cat food for urinary tract health
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.
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