Yes, that's exactly my observation too, brighter yellow first thing in the morning (which is the usual thing as it's the nights concentrated first urine), and then a lighter shade, but still looks like I am taking a vitamin b
supplement by the color
of it. Not too worried, but just wanted to confer with others. Glad to hear you are having the same thing. I drink plenty of water, but don't go totally overboard, because I do believe there's such a thing as overworking your kidneys.