Figure 1. Fasted morning urine pH during the dietary intervention for the low- and high-PRAL interventions. The objective was to attain the pH goal in 4 days; however, up to 9 days were required for some participants. “Last day” indicates urine pH on the last day of the dietary intervention (i.e. 4 to 9 days), which was also the morning during which outcomes assessments were performed. Values are means±SE. Paired t-tests were used for means comparisons. PRAL, potential renal acid load.