Alkaptonuria is an inherited condition that causes urine to turn black when exposed to air.
if you have black urine i strongly suggest you seek medical help immediatley... it is not normal to have black urine
fish urine is black a very ight black
Dehydration
Its black specs
Mini turds.
Insulin affects the concentration of glucose in the urine.
The chemicals in the urine
The most usual cause of blood in the urine is a kidney stone.
Aids
Matt dobbins
Any number of causes. Food and the start of a period.