| | Diet & Nutrition | Nutrition

Potassium Citrate-Rich Foods: Natural Sources for Alkalinization & Stone Prevention

Potassium citrate (citrate salt of potassium) occurs naturally in many fruits and vegetables. Dietary citrate increases urinary citrate, inhibiting calcium stone formation and alkalinizing urine.

High Potassium Citrate Foods (per 100g)

Clinical Context

Hypocitraturic calcium stones: Goal urinary citrate >320 mg/day (women) / >450 mg/day (men).
Dietary citrate: 4 oz lemon juice concentrate/day ≈ 30–40 mEq citrate (therapeutic).
Potassium citrate supplements (Urocit-K): 10–20 mEq 2–3×/day; monitor K⁺, renal function.
Contraindicated: Hyperkalemia, severe CKD, potassium-sparing diuretics, ACEi/ARB + CKD.

Practical Tips

Add lemon/lime to water throughout day.
Choose whole fruits over juice for fiber, less sugar spike.
Pair with calcium-rich foods (binds oxalate in gut).
Monitor urinary pH (target 6.0–7.0) with dipsticks if stone former.

Food-first approach supports stone prevention and overall metabolic health.

Nutrition - Related Articles

Food	Potassium (mg)	Citrate (mg)	Notes
Lemon juice	138	~4,000–8,000	Highest citrate concentration; dilute!
Lime juice	102	~3,000–6,000	Similar to lemon
Orange juice	200	~1,500–2,500	Well-tolerated; 1 cup ≈ 10–15 mEq citrate
Grapefruit juice	162	~1,000–2,000	⚠️ CYP3A4 interaction – check meds
Tomatoes / juice	237	~500–1,000	Also lycopene
Potatoes (baked, skin)	535	~400–800	High K⁺; moderate citrate
Bananas	358	~200–400	Convenient K⁺ source
Avocado	485	~300–500	Healthy fats
Cantaloupe	267	~300–500
Honeydew melon	228	~250–400