Kidney stone risk on GLP-1 — dehydration and oxalate concerns

One concrete data point for the thread. Worth knowing that eGFR estimates depend on creatinine, and creatinine depends on muscle mass. Losing muscle raises eGFR artificially, which flatters the number while the kidney is unchanged.

One thing that is still open after Dr.EndoEP’s answer:

How to read eGFR during rapid weight loss, given that creatinine depends on muscle mass and muscle mass is changing?

VendorMark said:

Worth knowing that eGFR estimates depend on creatinine, and creatinine depends on muscle mass.

Helpful anti-nausea foods for hydration users:

• Ginger (tea, chews, supplements — all work)
• Peppermint (tea or oil capsules)
• Plain crackers or rice cakes
• Bananas (easy to digest, replenish potassium)
• Clear broth (hydration + sodium)
• Small amounts of protein (chicken breast, plain Greek yogurt)

Avoid: greasy foods, spicy foods, large meals, lying down after eating. Keep meals small and frequent — I do 5-6 mini meals/day.

VendorMark said:

Worth knowing that eGFR estimates depend on creatinine, and creatinine depends on muscle mass.

Electrolyte monitoring on hydration — especially important during early titration when GI effects are most pronounced:

• Sodium: 141 mEq/L (normal, but was low at week 2 from vomiting)
• Potassium: 4.1 mEq/L (supplement if below 3.5)
• Magnesium: 2.1 mg/dL (supplementing with glycinate)
• Phosphorus: 3.7 mg/dL (normal)

Low electrolytes cause muscle cramps, heart palpitations, and fatigue — symptoms often blamed on the medication itself. Check your levels before assuming it's a drug side effect.

TrialNerd_Beth said:

Helpful anti-nausea foods for hydration users: Ginger (tea, chews, supplements — all work) Peppermint (tea or oil capsules) Plain crackers or rice…

That holds where the measurement is reliable. Where it is noisy — and a lot of what gets tracked here is noisy — the same reasoning produces confident nonsense.