Can You Take Potassium and Vitamin C Together?

Dose or timing may matter

The short answer

High-dose vitamin C generates oxalate requiring renal excretion, while potassium supplements add to the kidney's electrolyte clearance workload. The combination may stress renal function.

How to arrange timing

Keep vitamin C below 1,000 mg/day and potassium within recommended limits. Stay hydrated and monitor renal function.

Reference

Reference noted for this combination: Massey LK et al. J Nutr. 2005;135(7):1673-1677; Palmer BF. N Engl J Med. 2004;351(6):585-592

Important context

Whether supplements suit you together also depends on dose, product formulation, health conditions, and medication use. Ask a doctor or pharmacist first if you take medication, are pregnant or breastfeeding, or have a chronic condition.