When does glucose concentration in urine become zero?

Glucose concentration in urine does not become zero in healthy individuals. The kidneys are responsible for filtering glucose from the blood and reabsorbing it back into the bloodstream. In people with diabetes, the kidneys may not be able to reabsorb all of the glucose, leading to glucose in the urine (glycosuria). However, even in people with diabetes, glucose concentration in urine does not typically reach zero.