Hi I just got my results of my physical back. It says i need to retake a urinalysis and the code is R263.00. what does this mean? is there something wrong in my urine? i row and lift weights everyday and i also take a protein shake after lifting but i didnt work out the day before my physical so no protein shake! what should i do for the retake? i know it says no protein shakes 48 hours before but should i not eat a lot of protein. Also i work at my grade school as a janitor and lift a ton of stuff there. Do you think that could of skewered my results? Thanks!