On this page: - What is proteinuria? - Who is at risk for
proteinuria? - What are the signs and symptoms of proteinuria? -
What are the tests for proteinuria? - What additional tests for
kidney disease may be needed? - What should a person with
proteinuria do? - Points to Remember - Hope through Research -
For More Information What is proteinuria? Proteinuria-also
called albuminuria or urine albumin-is a condition in which
urine contains an abnormal amount of protein. Albumin is the
main protein in the blood. Proteins are the building blocks for
all body parts, including muscles, bones, hair, and nails.
Proteins in the blood also perform a number of important
functions. They protect the body from infection, help blood
clot, and keep the right amount of fluid circulating throughout
the body. As blood passes through healthy kidneys, they filter
out the waste products and leave in the things the body needs,
like albumin and other proteins. Most proteins are too big to
pass through the kidneys' filters into the u