Protein in the urine can be an important sign that the kidneys need attention. Healthy kidneys normally filter waste products from the blood while keeping most proteins, especially albumin, inside the bloodstream. When the kidney’s filtering system is damaged, more protein can pass into the urine.
This condition is often called proteinuria. When the protein is specifically albumin, doctors may use the term albuminuria.
You may see social-media posts claiming that a particular kitchen drink can “stop a kidney protein leak” within 30 minutes. There is no reliable evidence that a homemade drink can repair damaged kidney filters or permanently stop protein loss that quickly.
A urine test can detect protein, but finding protein in the urine does not automatically mean that permanent kidney damage is present. Temporary proteinuria can occur after strenuous exercise, dehydration, fever, infection, or other circumstances. That is why an abnormal result is often repeated or investigated further.
Persistent protein in the urine can be associated with chronic kidney disease. Diabetes and high blood pressure are two important causes of kidney damage, but other kidney diseases and medical conditions can also contribute.
One reason proteinuria deserves attention is that kidney disease can develop silently. A person may feel completely well even while kidney function is gradually changing. Regular testing can therefore be especially important for people with diabetes, high blood pressure, cardiovascular disease, or other risk factors for kidney problems.
Doctors may evaluate protein in the urine using an albumin-to-creatinine ratio or another urine test. Blood tests can also be used to assess kidney function, including measurements related to creatinine and estimated glomerular filtration rate.
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