What is the effect of high potassium foods on kidney health?

High potassium foods have a beneficial effect on kidney health primarily by helping to maintain fluid balance in the body. Potassium plays a critical role in fluid regulation, as it helps to balance sodium levels and support proper cellular function. This balance is essential for kidneys to function optimally. Adequate potassium intake can assist the kidneys in managing fluid levels, which is particularly important for individuals with conditions that affect fluid retention.

Moreover, potassium can help in regulating blood pressure, but this is often secondary to its role in maintaining fluid balance. While the other options mention potential effects of potassium, they either pertain to adverse consequences that aren't typically associated with high potassium foods (like kidney stones or increased urine acidity) or represent effects that are not the primary function of potassium in relation to kidney health. In contrast, the role of potassium in maintaining fluid balance is fundamental and well-supported by nutritional science.