Doctor Checking Urine For Protein?

Question

Hey, I'm 15, male, my doctor checked my urine for any protein, and it came out negative, which is good, because urine is not supposed to have protein.

I'm just wondering, what would cause urine to have protein? It can't be due to consuming extra protein, since any extra protein would be excreted through wastes.

Answer 1

having protein in your urine means that your kidneys are not filtering it out properly and if you take in too much protein and your kidney is not filtering it right it can make you really sick