← brief for 2026-08-11 · Slowing decline
The Urine Ammonium-pH Index is a Measure of Kidney Tubular Function
Key takeaways
Researchers tested a new urine measure, the urine ammonium-pH index, to judge how well the kidney's tubes are working. In their data it predicted who would lose kidney function faster. This is an observational finding, so it shows the measure tracks with decline, not that it causes it. It is a preprint and not yet peer reviewed.
Source
Preprint · medRxiv nephrology preprints · 2026-08-10
https://www.medrxiv.org/content/10.64898/2026.08.06.26359870v1?rss=1