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Potassium supplementation (clinical)

Blood pressure · Cardiovascular · Electrolyte

Tier 1 — Strong Evidence

What it is

WHO recommends adults consume at least 3,510 mg/day potassium. A 2024 meta-analysis of 32 trials confirmed supplementation reduces systolic blood pressure by 4.5 mmHg in hypertensive adults. The DASH diet, rich in potassium, is a cornerstone of hypertension management. Dangerous in kidney disease — always check renal function before supplementing. Balances sodium for cardiovascular protection.

Efficacy

4/5

Safety

4/5

Research

5/5

Onset

3/5

Cost

5/5

Drug-int.

3/5

Dose

99 mg/dose OTC limit in US; higher doses require prescription or dietary sources; target 3,500–4,700 mg/day total from diet and supplements

Time of day & tips

Prioritise dietary sources — bananas, potatoes, beans, leafy greens. OTC supplements are limited to 99 mg per dose. Avoid in kidney disease without monitoring. Space from ACE inhibitors and potassium-sparing diuretics.

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