When blood plasma levels are above 0.1-0.2 millimoles per liter, ketones appear in the urine. High levels of ketones can create an acidic environment in your body, leading to a condition called ...

The acid is excreted in your pee, turning it brownish-black when exposed to air. You'll likely never have purple pee, but there is a rare phenomenon called purple urine bag syndrome. It happens ...

High urine concentration and low urine pH help to preserve the formed elements. Therefore, the first morning void which is more likely to be acidic and concentrated should be used whenever possible.

However, when alkali was administered and serum bicarbonate levels were brought into the range of normal, the urine, normally neutral or slightly acid at this time, contained inappropriately large ...