Which of the following could cause an increased kidney enzyme?

An increased kidney enzyme level is often indicative of kidney stress or damage. Dehydration can lead to a decreased blood flow to the kidneys and result in an accumulation of toxins in the bloodstream. This situation can put strain on the kidneys and lead to an elevation of certain enzymes, such as creatinine and blood urea nitrogen (BUN), which are common indicators of kidney function.

In a dehydrated state, the kidneys may not filter blood as effectively, contributing to an increase in these enzymes. The other options, while they may have implications for renal health, do not have the same direct impact on kidney enzyme levels associated with impairment. Overhydration can dilute blood constituents and potentially lower enzyme levels, while dietary changes and high potassium levels are more complex in their effects and not directly correlated to a straightforward increase in kidney enzyme activity.