Question

WHY GLUCOSE IS ABSENT IN URINE OF HEALTHY PERSON ?

Answer 1

In a healthy person, under normal physiological conditions, all the glucose filtered in glomerular filtrate is completely reabsorbed by the renal tubules and glucose is, therefore, found completely absent in urine.100% of the glucose gets reabsorbed into your bloodstream, and turned into glycogen by insulin. However if you have diabetes, you don't produce enough insulin, glycogen can't be formed, and therefore the glucose simply gets excreted.

Sugar in your urine only occurs if your blood sugar levels exceed a certain threshold. It is a sign that your body is struggling to keep your blood sugar levels under control by trying to get rid of the sugar in your urine. If your diabetes is well controlled, you should not have sugar in your urine.