Potassium Citrate 99 mg by Thorne

If your diet is light on fruits and vegetables, you train hard and sweat a lot, or you take a potassium‑wasting diuretic like hydrochlorothiazide, a potassium citrate supplement can help close a common electrolyte gap. It’s a maintenance‑level dose that fits people with low‑normal Serum Potassium, muscle cramping during exercise, or higher sodium intake. It also suits low‑carb eaters who lose minerals early in ketosis. For recurrent kidney stones, clinical prevention usually needs much higher, prescription‑strength potassium citrate; this 99 mg capsule is for everyday upkeep, not stone therapy.

Potassium is the main inside‑the‑cell electrolyte that stabilizes the electrical signals nerves and muscles use to fire. When potassium is low relative to sodium, cramps, fatigue, and higher blood pressure are more likely. The citrate form adds a base, which buffers acid load from high‑protein or low‑veg diets and raises urine citrate, a natural calcium binder that makes certain kidney stones less likely. Compared with potassium chloride, potassium citrate is gentler on the stomach and more effective for urine alkalinization (a shift to less acidic urine).

Take one capsule with meals, one to three times daily, and spread doses through the day if you’re active or sweat heavily. Food reduces stomach upset. If you track labs, look for steady Serum Potassium and stable CO2 (bicarbonate, your blood’s acid–base marker) within 1–2 weeks. For blood pressure, pair potassium citrate with cutting back sodium and recheck readings in 2–4 weeks. If you need more than small maintenance doses, discuss higher‑potency options with your clinician.

Skip potassium citrate unless cleared by your clinician if you have chronic kidney disease (reduced eGFR), take ACE inhibitors (lisinopril), ARBs (losartan), potassium‑sparing diuretics (spironolactone, eplerenone, amiloride, triamterene), or the antibiotic trimethoprim—these raise potassium and can cause dangerous levels. Also use caution with NSAIDs, heparin, and calcineurin inhibitors (tacrolimus). If you form calcium phosphate stones or have consistently high Serum Potassium, this isn’t the right pick. Stop and get labs if you notice weakness, palpitations, or tingling.