UT Strength Feline supports healthy urinary tract function and is specifically recommended for cats prone to UT issues and crystals. It contains D-Mannose, a naturally occurring simple sugar that removes harmful bacteria through elimination. Its absorbed eight times slower than glucose and is not converted to glycogen or stored in the liver when ingested. D-Mannose goes directly into the bloodstream from the kidneys to the bladder. The bacteria displaced by D-Mannose are responsible for UTIs and other issues. N-acetyl glucosamine (NAG) is a form of glucosamine that supports the production of glycoproteins, which help create a protective barrier against acids and bacteria. GanedenBC30 is a patented, highly-stable probiotic strain that supports digestive health and helps maintain microflora balance in the gut. Cranberry extract helps acidify and deodorize urine. Even fussy eaters love these delicious chicken liver-flavored chews!