Key Takeaways
- Cats can eat small amounts of ripe tomatoes as part of their diet 🍅✔️
- They should never eat unripe or green tomatoes, as they contain the dangerous toxin solanine ❌
- Other parts of the tomato plant, such as the stem and leaves, are toxic too ❌
- Ketchup and some other tomato products contain spices that are harmful to cats (e.g., onion and garlic) ❌
Health Benefits of Tomatoes
A single medium-sized tomato contains around 22 calories, which is very little. It also has significant amounts of vitamins C and A (in the form of beta-carotene). Small amounts of most other essential nutrients can be found in ripe tomatoes, too, and they’re a good source of antioxidants.

Antioxidants such as lycopene (found mostly in tomatoes) can help scavenge harmful free radicals from the body and protect cells from damage. This can reduce the risk of some diseases, such as cancer. So can cats eat tomatoes?
Fact Check 🔍
Cats don’t need vitamin C in their diet. Their bodies are able to produce this vitamin on their own, unlike ours. So if you choose which vegetables to give your cat based on their vitamin C content, it’s worth looking at other nutrients instead!
When Tomatoes May Be Bad for Cats
Unripe tomatoes, as well as the rest of the plant, are toxic to cats. The green parts of the tomato plant contain solanine, which can cause gastrointestinal problems, depression, a slowed heart rate and even death in cats. The stem and leaves also contain high levels of oxalates, which can cause kidney stones in cats.
On the other hand, ripe tomatoes are safe for cats to eat, as long as they aren’t fed in large quantities. Cats that eat too many tomatoes can experience stomach upset and diarrhea. Tomatoes are a good source of vitamin A and antioxidants, so they can be a healthy addition to a cat’s diet, but only in moderation.
Other Health Concerns
The acidity of tomatoes can cause gastrointestinal upset in cats, especially if they have a sensitive stomach. Some cats shouldn’t eat tomatoes or any tomato products at all. If your cat is allergic to tomatoes, eating them can cause an adverse reaction. And if your cat has a history of urinary tract problems, tomatoes may exacerbate the condition.

That said, most cats can eat small amounts of tomatoes (we’re talking one cherry tomato) without any problems at all. Nevertheless, it’s always best to speak with your veterinarian before feeding your cat any new food. This is especially important if your cat has a history of health problems.
Can Cats Eat Tomato Products Like Ketchup?
Tomato sauce can be part of a healthy diet for people, but can cats eat tomato products? The answer is maybe. Cats can eat some forms of tomatoes, but not all tomato products are safe for them. Ketchup, for example, contains spices that are poisonous for cats and should be avoided. These include:
- onions;
- garlic;
- allspice;
- cloves;
- mustard.
However, pure canned tomatoes shouldn’t cause any harm problems in small amounts. If you’re cooking something with fresh tomatoes, be sure to remove the seeds and stems before offering them to your cat. Do not give your cat tomato sauce or paste that you make for yourself – unless it’s just tomato, without any spices that can cause poisoning in cats.

If you’re unsure whether a tomato product is safe for cats, ask your veterinarian. They can help you determine which products are safe and which ones are not.
Conclusion: Can Cats Eat Tomatoes?
Generally speaking, can cats eat tomatoes? No, tomatoes shouldn’t be a regular part of your feline’s diet. Occasional consumption is acceptable, but remember that even ripe tomatoes can cause gastrointestinal upset in cats. If you’re giving your cat tomatoes, make sure that they’re diced into small pieces. Don’t give them any other part of the tomato plant, as it’s poisonous to cats. If your cat has eaten a large amount of tomatoes, or if they’re showing any symptoms of gastrointestinal upset, contact your veterinarian immediately.
There are other vegetables that can be excellent for felines as part of their diet. Some good examples include cucumbers, zucchini, and green beans. Always consult with a veterinarian to ensure that your cat is getting the right nutrients in his or her diet.
Editor’s Note
Remember, cats are obligate carnivores, which means they require animal-based protein to survive. This doesn’t mean that they can’t eat plants occasionally, but it’s important to make sure they’re getting the nutrients they need from proper cat food.
Frequently Asked Questions
What Happens If a Cat Eats Tomatoes?
A cat that eats a small amount of ripe tomatoes is not likely to experience any health problems. They might suffer from mild stomach upset and diarrhea. If a cat eats a large amount of tomatoes, or if the tomato isn’t fully ripe or the cat has an allergy to tomatoes, they could experience more serious problems.
How Much Tomato Is Toxic to Cats?
If we’re talking about ripe tomato fruit, the amount that causes stomach irritation may vary from cat to cat. Generally, it’s thought that a typical cherry tomato will be well tolerated. If your cat eats a lot of tomatoes, or if the cat is allergic to them, they could experience heartburn, vomiting, diarrhea and other symptoms.
Why Do Cats Love Tomato?
Not all cats are interested in tomatoes, but some are. The answer to this question is not entirely clear, but it’s likely due to the way that tomato smells or its texture. Some cats might like to play with cherry tomatoes, or they may just be looking for something new and interesting to try.
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