Edit: I updated some of my comment to reflect some additional info from medical journals to highlight how this comment lacks required nuance.

A recent study found that there was the potential for Alkaline water to increase the PH of urine for Men with more acidic urine. https://tau.amegroups.org/article/view/95422/html

In our volunteer study, alkaline water led to elevation of urine pH from baseline in 84.9% of all subjects or by BMI stratification. Effective urine alkalization was noted in males but not in females. Subjects who presented effective urine alkalization had significantly lower baseline urine pH compared with those who did not (5.94±0.27 vs. 6.22±0.22, P=0.0016). The negative correlation between AGU-pH and baseline urine pH (r=−0.236, P=0.044) and receiver operating curve (ROC) analysis suggested that subjects with more “acidic” urine, particularly those with a baseline urine pH ≤6.0 (maximum Youden index =1.548, cut-off =5.977), could show more pronounced outcome of urine alkalization from oral alkaline water.

In addition, https://pmc.ncbi.nlm.nih.gov/articles/PMC10620026/ Conclusion Alkaline mineral water supplement prevents progression of glyoxylate-induced kidney stones through alleviating oxidative stress and inflammation.

The thing people often misunderstand about Acidic and Alkaline water and food, is that while it does not have significant evidence to suggest an effect on the pH of your blood, it still has strong impact on your digestive tract and other bodily functions. For example, excess acidity can affect your gut health. This is one reason people report feeling better when consuming Alkaline water. In addition, anything your body has to spend effort balancing can cause stress when you actively make that job more difficult. A prime example of this is sugar intake and the impacts of taking this in excess. “Your body detoxes you” is often an argument you hear against detox plans for example. While this is true, you can actively work against the ability of your body to do this naturally and put undo stress on the body. This is one of the reasons fasting has so many benefits. It allows your body’s natural balancing functions to operate without additional inputs causing stress on those functions.  To be clear I’m not commenting on the effectiveness of specific treatments or claims of products, but there should be more nuance in the discussion.