They are too big to pass through the filter in the kidneys
Anuria means absence or defective excretion of urine.
Within the proximal tubules and the Loop of Henle are glucose cotransporters. With one sodium atom, the glucose is reabsorbed into the vasa recta to be returned to the body. Albumin is a protein and cannot easily cross the glomerulus. The effect of these two mechanisms is the same: the substances are not in urine.
Urine and faeces
Urine should certainly not contain more protein in it than a protein shake. If there are too high levels of protein in the urine, it is known as proteinuria.
urine protein X 24 hr urine volume/ 100
protein over spill in urine level 10
Protein in the urine is called proteinuria, and is very serious. Have it seen to, promptly.
Having your period can cause high protein levels in a urine test. Protein in the urine can also be caused by infection.
Presumably you have a good reason for testing the protein level of a toddler. In these circumstances you need to see a doctor.
There should be no protein in the urine unless the patient is ill or diabetic.
Small amounts of protein usually aren't a cause for concern. Larger amounts of protein in the urine may indicate a kidney problem. Protein is often found in the urine of young people after they exorcise.
Hyperproteinuria is the term for an abnormal high concentration of protein in urine.