When they are not working properly, urine may contain large amounts of glucose, which can be attractive to ants.

Do ants eat urine?

Sugar ants even prefer it to sugar water

Now, 3 years later, Petit has found that the insects crave the urine of people, kangaroos, and other animals, likely to survive the island's nutrient-scarce environment. They even prefer it to sugar water.

Why do ants follow my urine?

Ants congregate near unflushed toilet bowls or toward spilled urine. Sometimes they are seen in hamper baskets with soiled underwear. These observations are indeed evidence of sugar being in the urine of these individuals, thanks to the efficient sugar-detecting capabilities of our tiny crawling friends.