Deficiency/Heart/Longevity

Potassium

Essential mineral that helps regulate blood pressure and fluid balance, mainly for adults with low dietary potassium.

Potassium

Essential mineral that helps regulate blood pressure and fluid balance, mainly for adults with low dietary potassium.

score

evidence

Caution

risk

Proven Benefits

01Corrects low potassium levels

02Lowers blood pressure

03Reduces calcium stone recurrence

04Reduces urinary calcium loss

05May support bone density

06May lower stroke risk

Chemical Forms

Recommended

Potassium citrate
Potassium chloride
Potassium gluconate

Avoid

Potassium bitartrate / cream of tartar (not an appropriate supplement form; overdose risk)
Slow-release potassium chloride wax-matrix tablets (higher GI irritation risk)

Expert Note

Most soluble potassium salts are well absorbed. Citrate is preferred when kidney stone prevention or lower urinary calcium is the goal, while chloride is better for true potassium replacement when chloride is also depleted. Gluconate is fine for low-dose OTC use but usually provides less elemental potassium per capsule.

Protocol

Amount

99-300 mg

Frequency

Once or twice daily with meals

When

With meals and a full glass of water; most daily potassium should still come from food.

Condition-Based Dosing

Dietary intake clearly below AI (<2600 mg/day women, <3400 mg/day men), normal kidney function

99-300 mg daily while increasing potassium-rich foods.— Food first is safer and more evidence-based than high-dose self-supplementation; many OTC tablets provide 99 mg per serving.

Mildly elevated blood pressure with high sodium intake, normal kidney function

300-1000 mg daily from supplements, alongside sodium reduction and a higher-potassium diet, for 4-8 weeks.— Trials often use larger total potassium intakes than capsules alone provide, so diet matters more than pills.

Recurrent calcium kidney stones

Potassium citrate 20-40 mEq/day in divided doses, clinician-guided.— Equivalent elemental potassium varies by product; monitor urine studies and serum potassium.

Serum potassium < 3.5 mmol/L

Seek medical evaluation rather than self-treating with large OTC doses.— The cause matters, and moderate to severe hypokalemia may require prescription dosing and ECG/lab follow-up.

Safety & Limits

Upper Safe Limit

No UL established for dietary potassium (National Academies); avoid self-directed supplemental intakes above 1000 mg/day elemental unless clinically monitored.

Cycling

Safe for continuous use

Contraindications

Chronic kidney disease or reduced eGFR — impaired excretion can cause dangerous hyperkalemia

ACE inhibitors or ARBs — additive potassium retention can raise serum potassium

Potassium-sparing diuretics such as spironolactone, eplerenone, amiloride, or triamterene — high hyperkalemia risk

Addison disease or hypoaldosteronism — reduced potassium excretion

Tacrolimus, cyclosporine, or trimethoprim-sulfamethoxazole — can sharply raise potassium

Known GI stricture, ulcer, or delayed gastric emptying — solid potassium tablets can irritate the GI tract

Synergies

Magnesium

Magnesium deficiency increases renal potassium wasting, so correcting magnesium can make potassium repletion more effective.

Avoid Combining With

✕High-sodium diet (blunts blood pressure benefit and increases urinary potassium loss)
✕Loop or thiazide diuretics (increase urinary potassium loss)
✕Licorice or glycyrrhizin (can promote potassium wasting)
✕Chronic diarrhea or laxative abuse (ongoing GI loss undermines repletion)

Updated Invalid Date