Glucose is usually completely reabsorbed from the filtrate by the time the filtrate has reached the

Glucose is usually completely reabsorbed from the filtrate by the time the filtrate has reached the proximal convoluted tubule (PCT) in the nephron of the kidney.

In the renal tubules, which are part of the nephron, glucose is reabsorbed from the initial filtrate back into the bloodstream. The majority of glucose reabsorption occurs in the proximal convoluted tubule. Glucose is actively transported from the tubular fluid into the cells lining the tubule and is then passively transported into the peritubular capillaries, reentering the bloodstream.

Under normal physiological conditions, the renal tubules are highly efficient at reabsorbing glucose, preventing it from being excreted in the urine. If there is an excess of glucose in the filtrate that cannot be reabsorbed, it may appear in the urine, which is a condition known as glycosuria and is often associated with diabetes or other health issues affecting glucose regulation.