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Introducing Health Check-In™ Boosters™

Checks health in mere seconds.

Know your cat’s business the second they do theirs. Sprinkle our Health Check-In™ Boosters™ litter additive onto your litter and instantly get an indication of your cat’s health. Our easy-to-read health monitoring formula shows results for 48 hours and turns granules a distinct blue when blood is detected and stays white when your cat is healthy. Vet-approved and clinically tested, meet the safe and reliable way to monitor your feline friend’s health.

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2 out of 3 cats are at risk of developing urinary tract diseases. Health Check-In™ Boosters™ litter additive turns an unmistakable blue when blood is detected in your cat’s urine, a key indicator of urinary tract issues. 1) Sprinkle Ensure your litter box is clean and filled with fresh litter. Evenly sprinkle the entire pouch of Health Check-In™ Boosters™ litter additive onto the litter. 2) Spot Wait for your cat to urinate and observe any color changes on the granules. The color will remain visible for up to 48 hours. 3) Seek If you spot blue granules, seek advice from your veterinarian promptly.
Detects Blood. Not pH. Blood is a more reliable indicator of urinary health issues than pH, which can be influenced by diet, hydration, or stress – leading to misleading results. This provides you with precise health monitoring and the confidence to take action when needed. What To Look For - WHITE: Normal, Healthy. LIGHT BLUE: Caution, Monitor. BLUE: Health Issue, Contact Vet.
Because We Love Your Cat Too. Veterinarian-Approved: World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive is backed by rigorous scientific research and validation from top veterinary institutions, including the University of Montreal, the Veterinary School of Toulouse, and Concordia University. Our product is tested and proven to deliver reliable results that you can trust. No Harsh or Harmful Chemicals Our product is different from typical silica health monitoring litter brands. That’s because our starch-based formula contains no harmful chemicals, ensuring it’s safe for your cat, you, and the planet. This product is not intended to diagnose, cure, prevent, or treat disease.
Animated gif of how the World’s Best Cat Litter® Health Check-In™ Boosters™ work.
No Confusion. Only Conclusions. Health Check-In™ Boosters™ litter additive instantly turns a distinct blue when blood is detected, giving you a clear and accurate result that lasts 48 hours after they pee. Granules remain white when your cat’s healthy and turn a distinct blue when blood is detected.

Why Health Check-In™? Safe for all paws. Clinically tested, veterinarian-approved, and made without silica.

Why Health Check-In™? Plays well with others. Sprinkle Health Check-In™ Boosters™ litter additive onto litter, including World’s Best Cat Litter®.

Why Health Check-In™? More accurate than others. Health Check-In™ Boosters™ litter additive detects blood instead of urine’s pH level for a more reliable result.

World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive

Health Check-In™ Boosters™ FAQs

How does Health Check-In™ Boosters™ litter additive work?

World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive uses patented technology that turns blue when there is blood in a cat’s urine (hematuria). Developed in collaboration with veterinary universities, it provides a very reliable and precise indicator of early urinary tract issues.

How does Health Check-In™ Boosters™ litter additive compare to other products?
  • Simple: Just sprinkle it on top of your existing litter. One packet lasts up to three weeks.
  • Fast: If blood is present, you will see a blue color within seconds.
  • Convenient: See results for at least 48 hours.
  • Safe: Veterinarian-approved and proven safe.
How do I use Health Check-In™ Boosters™ litter additive?
  1. Sprinkle: Ensure your litter box is clean and filled with fresh litter. Evenly sprinkle the entire pouch of World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive onto the litter.
  2. Spot: Wait for your cat to urinate and observe any color changes on the granules.
  3. See: If you spot blue granules, seek advice from your veterinarian promptly.
How often should I check my cat’s litter box?

World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive changes color in seconds and has a long-lasting vibrant color for at least 48 hours, so you can check when it’s convenient for you. Checking daily is a great way to help keep track of your cat’s health.

How long does one packet of Health Check-In™ Boosters™ litter additive last?

One packet of World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive lasts up to three weeks for one cat, when used as directed.

How frequently should I use Health Check-In™ Boosters™ litter additive?

We recommend the daily use of World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive because the early detection of urinary disease is key to helping keep your cat healthy. One packet lasts up to three weeks, so you should add a new packet at least every three weeks.

Does Health Check-In™ Boosters™ litter additive work with all litter types?

World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive can be used with most litter types. For best results, we recommend using a litter that is free of artificial colors and avoiding litter or cleaning products with bleach or “oxy” ingredients. And it works great with World’s Best Cat Litter®!

If my cat tends to dig in the litter or bury the granules, can I still effectively use Health Check-In™ Boosters™ litter additive?

Yes! The granules may get buried, but they still will be effective and will become visible when scooping the litter box.

Is it possible to use Health Check-In™ Boosters™ litter additive in a multi-cat household?

Yes, World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive can be used in multi-cat households. Because the granules work within seconds of coming into contact with urine, you can monitor the litter box after each cat visits. If this is not possible, it may be necessary to temporarily separate the cats and use individual litter boxes with World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive granules.

Is Health Check-In™ Boosters™ litter additive compatible with smart litter boxes?

Yes, World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive is compatible with most automatic litter boxes. Before disposing of the contents, inspect the granules present in the waste receptacle.

How do I interpret the different colors?
  • White or Yellow = Normal. Great news! Your cat does not show signs of urinary tract disease.
  • Light Blue = Caution. We advise that you continue monitoring and pay attention to your cat’s behavior. When in doubt, contact your veterinarian.
  • Blue = Health Issue. Please contact your veterinarian as soon as possible, as this indicates your cat may have a urinary tract disease.
The granules have turned blue, but my cat doesn’t seem to be sick. What should I do?

World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive granules help detect urinary health concerns as quickly as possible, even before the cat shows other signs. Even if your cat does not appear to be ill, blood in the urine is abnormal and you should consult your veterinarian.

My cat looks sick, but the granules are still white. What should I do?

Although World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive granules are a powerful aid in detecting blood in the urine, it does not detect every possible cat health concern. If you have any doubts about your cat’s health, consult your veterinarian.

Are Health Check-In™ Boosters™ litter additive granules safe for my cat?

Yes, World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive granules are safe when used as directed. They have been thoroughly tested and deemed safe by veterinary universities.

What happens if my pet (cat, dog, or other) eats the granules?

World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive granules are safe for your pet’s health even if they eat them. If you have any doubts about your pet’s health or notice a change in behavior, contact your veterinarian.

Are Health Check-In™ Boosters™ litter additive granules safe for my family?

Although World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive granules are considered safe, they contain an ingredient that may cause food intolerance in some people. If ingested, rinse the mouth with water and consult a healthcare professional if in doubt.

Can I use part of the packet and save the rest for later?

We recommend that you pour the entire pouch onto your litter. Unused granules will remain effective for 30 days when stored in a cool, dry place.

Can I add Health Check-In™ Boosters™ litter additive after my cat urinates?

No, it won’t be as reliable if added after the cat has urinated.

What are Health Check-In™ Boosters™ litter additive granules made of?

World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive granules are primarily made of starch and cellulose, both of which are completely safe. The agent that turns blue has long been used by doctors and veterinarians.

What is the shelf life of Health Check-In™ Boosters™ litter additive?

World’s Best Cat Litter® Health Check-In™ Boosters™ litter additive lasts for 24 months. The “best by” date is printed on the back of each package. For best results, store in a cool, dry place.

Is Health Check-In™ Boosters™ litter additive backed by a money-back guarantee?

Yes, it is backed by a 90-day satisfaction guarantee.

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