I've found that a few days after starting ingesting urine my urine becomes lighter in color and has less taste so I would suspect that's what you are experiencing. Also the taste of your urine will tell you what you've been eating - if you don't eat a healthy diet. If you go off of UT for a few days, you will find that it will darken again.
I personally would never drink anything but fresh urine. After urine has been sitting for 15 minutes it begins to turn to ammonia - which I don't wish to have in my body. Aged may be all right for topical application, but I'd leave it alone for ingestion.
If you can get hold of the VHS video "Urine: Good Health" you will find that there is a guy with full blown AIDS who began drinking his own urine and had such good results that he went completely off of his medications. It's a great video, not as professionally done as you would like it, but it has a number of doctor and practitioners comments - runs about 60 minutes. So, he began UT while taking AIDS meds.