What is it?

Glycosuria refers to a condition in which there is too much sugar secreted in urine. Renal glycosuria is a rare inherited condition characterized by high levels of sugar in the urine, even in the presence of normal levels of sugar in the blood. It is caused by a genetic mutation leading to defects in the renal tubules, where sugar is supposed to be reabsorbed.

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Signs & symptoms

Renal glycosuria typically does not present with any symptoms. Sometimes, the people who have it may suffer from excess urination and extreme thirst.


Renal glycosuria diagnosis includes: a normal oral glucose tolerance test in regard to plasma glucose concentration, normal plasma levels of insulin, free fatty acids, glycosylated hemoglobin, and relatively stable urinary glucose levels with glucose present in all urine samples. Genetic testing may confirm the diagnosis.


This condition does not require any treatment.

☝️ This is not a substitute for professional medical advice. Please consult with your physician before making any medical decision.

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