What are the best ways to raise egfr to over 90, other than water and other liquids, in a person60-80? currently egfr is79. still want level @ 90+.

Blood Pressure: As we age, the defining factor stressing the kidneys is blood pressure. Good control of blood pressure, regulate exercise and a healthy diet are the best thing you can do to optimize your kidney function.

Stop worrying: The GFR estimates are subscientific -- you can tell this yourself because the adjustment for muscularity is based not on looking at you, but on the box someone checks to indicate your race (!) i'd be very happy with your current labs. Treat the person, not the numbers. Comply with any rx for hypertension, limit your salt intake, and keep doing the fitness stuff you enjoy.