World's Best Boosters Health Check-In Cat Litter Additive, .42-oz bag

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About This Item

Details

  • This is an easy-to-use litter additive that helps monitor your kitty’s health at home.
  • It can detect urinary tract issues in seconds.
  • The vibrant blue color lasts for up to 48 hours, giving you a visual indicator and peace of mind.
  • Practice proactive care that is made simple with this veterinarian-approved product.
  • This additive can last up to 3 weeks in the litter box.

Ingredients

Learn More About World's Best From Our Team of Experts

Choose From Six Different Formulas

Regular formulas include Comfort Care, Multiple Cat Unscented, Multiple Cat Lavender Scent and Multiple Cat Lotus Blossom Scent. Or try solution-based Low Tracking & Dust Control or Poop Fighter Maximum Odor Defense Litters.

Made from Renewable Corn

World’s Best Cat Litter is made from renewable corn sourced from Midwest farmlands, then harvested and processed into super absorbent granules. Their litter formulas are made with kindness for you, your cat, and the planet.

World’s Best Cat Litter Boosters

World’s Best Cat Litter Boosters litter additives solve the litter box's biggest problems with a simple sprinkle. These litter additives can help you get a read on your cat's health, get rid of odor, and lure your cats to the litter box.

Do More With Less

Unlike clay litter, World’s Best Cat Litter uses a special process to compress corn into super-absorbent granules. These granules trap odor deep inside and form tight clumps on contact—so you can do more with less litter.

About World’s Best Cat Litter

World’s Best Cat Litter is more than just a name—it’s a promise the company made when they set out to create a cat litter brand unlike any other. World’s Best Cat Litter makes cleanup easy, leaving you more time to spend with your feline friends!

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Reviews
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4.0
Rated 4 out of 5 stars
121 Ratings
Terms & Conditions

53 Customer Reviews

Rated 5 out of 5 stars
By rxmfvtdhnp on Jan 1, 2026

Didn’t make my dog sick when she ate it

My lab puppy broke into the cat room and ate a fair amount of cat litter before being caught in the act. She passed this litter easily. That’s why I buy it. No clay

My lab puppy broke into the cat room and ate a fair amount of cat litter before being caught in the act. She passed this litter easily. That’s why I buy it. No clay or fragrances to make her sick. And it’s less slimy and gross if barfed up than clay litter.

Rated 5 out of 5 stars
By Shari on Jan 13, 2026

Check health of cat

I sprinkled as instructed. I have 2 cats and neither one of them had any problems. There was no color change.

I sprinkled as instructed. I have 2 cats and neither one of them had any problems. There was no color change.

Rated 5 out of 5 stars
By Lori on Aug 25, 2025

This product saved my cat's life

I noticed Rey's urine clumps were slightly larger than usual and she lost a little weight. I put out fresh liter, their low tracking.. sprinkled this on top..Rey

I noticed Rey's urine clumps were slightly larger than usual and she lost a little weight. I put out fresh liter, their low tracking.. sprinkled this on top..Rey jumped in, did her thing.. the dot turned blue immediately (indicating blood in urine).. took her to the vet the next morning. Rey was diagnosed with hyperthyroidism. In the two weeks to follow, she received radio iodine treatment in NYC, and is doing great now. That's it.. Lori M

Rated 3 out of 5 stars
By Natasha on Sep 4, 2025

I don't think it worked

No sure if I got a bad batch because they did not change color at all or indicate anything maybe wrong with my fur ball but I took him to the vet anyway and he was

No sure if I got a bad batch because they did not change color at all or indicate anything maybe wrong with my fur ball but I took him to the vet anyway and he was diagnosed with crystals in his urine. This should have atleast changed some kind of color. So I only gave it a 3 just in case that particular bag didn't work properly.

Rated 5 out of 5 stars
By Gayle on Nov 1, 2025

great product

Well I did not know my boy had any issues until using this product. So great product but it is expensive and there is not much in each bag.

Well I did not know my boy had any issues until using this product. So great product but it is expensive and there is not much in each bag.

Rated 1 out of 5 stars
By Sherie on Oct 29, 2025

Not impressed nor worked

I purchased 3 or 4 of these just to make sure I used them correctly. As it turns out, it did not detect a UTI in my elderly cat.

I purchased 3 or 4 of these just to make sure I used them correctly. As it turns out, it did not detect a UTI in my elderly cat.

Rated 3 out of 5 stars
By Stacy on Sep 4, 2025

Not sure it works

I have been purchasing this product for awhile now. I add it to the boxes with multiple cats. Currently have a kitty with a UTI I have not seen any changes in color

I have been purchasing this product for awhile now. I add it to the boxes with multiple cats. Currently have a kitty with a UTI I have not seen any changes in color in the grandules. The UTI was confirmed by the vet when her behavior was off.

Rated 2 out of 5 stars
By Robin on Aug 9, 2025

Inaccurate

The "diagnosis" from the additive was not in agreement with the actual diagnosis by the vet. And the color change wasn't clear enough to be sure it was light blue

The "diagnosis" from the additive was not in agreement with the actual diagnosis by the vet. And the color change wasn't clear enough to be sure it was light blue or real blue.

Rated 5 out of 5 stars
By Gulmira on Sep 20, 2025

It’s natural

Since my cat is longhair it am not too worried about him digesting it while he licks himself after the bathroom

Since my cat is longhair it am not too worried about him digesting it while he licks himself after the bathroom

Rated 5 out of 5 stars
By Virginia on Jun 27, 2025

Easy to use!

I like that it can be used with the litter I’m currently using. It’s much less expensive than buying a whole bag of the litter that indicates health problems.

I like that it can be used with the litter I’m currently using. It’s much less expensive than buying a whole bag of the litter that indicates health problems. The instant results gave me peace of mind. I would use it again if I needed to.