Yes they do sell a powdered form of urea but to tell you the truth except in extreme cases I think your own urine is best as it work on the cellular and subcellular levels coded with your own holographic imprint! Why would you want someones else urine even if it is capsulated ,when you can have your own far superior urine!
If you find it hard to swallow ,pardon the pun, start out small, just a shot glass full so it goes right down and work up to larger amounts!