World's Best Cat Litter® Boosters™ Health Check-In™ offers a revolutionary approach to monitoring your cat's health. This veterinarian-approved additive leverages advanced technology to provide instant, color-changing results that detect blood in your cat's urine, ensuring you get the most accurate health insights.  Designed for ease of use, simply sprinkle the additive over any type of cat litter and watch for color changes. Within seconds, the granules will turn blue to signal the presence of blood. Light blue indicates the need for closer observation, while dark blue suggests immediate veterinary attention.  Our product stands out with its 97% starch-based formula, which is completely safe for your pet, even if ingested. Free from harsh chemicals, it ensures the well-being of your cat, your family, and the environment. Each application lasts up to 3 weeks, providing continuous health monitoring and making it a cost-effective solution for pet owners.  With World's Best Cat Litter® Boosters™ Health Check-In™, you can effortlessly keep track of your cat's health, ensuring early detection of potential issues and timely intervention. This smart, at-home health monitoring solution allows you to give your pets the care they need, stress-free and in the comfort of your home.