My website: https://nile.red Giveaway: https://goo.gl/ZddndH Giveaway winners have been drawn and all packages have already been shipped out. Thanks to everyone who participated! ------------------------------------------ Note: when i mention dilute nitric acid, it is a 50/50 mixture of conc. HNO3 (~65%) and water. Urea is the largest non-water component of pee and it's generated by the metabolism and breakdown of proteins. It's an extremely useful compound and it's used in many commercial