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Potassium

Supplement mineral heart & metabolicfitness
Aka: potassium gluconate, potassium citrate
Brands seen in Singapore: 21st Century, NOW Foods, Life Extension, Vitacost, NaturesPlus
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Cell fluid balance, nerve transmission, muscle contraction
When to take
Timing not addressed by NIH ODS
Take with
Water · most pills hold 99 mg vs a 4,700 mg daily value
Pros & cons
Pros
  • NIH ODS: most trials found a blood-pressure reduction
  • HSA allows 'normal muscle function' and nerve claims
  • Adequate intake 3,400 mg (men) · 2,600 mg (women) a day
Cons
  • No UL — very large doses linked to heart harm, death
  • Kidney disease or ace inhibitors: hyperkalemia risk
  • Minor stomach upset · US makers cap pills at 99 mg
Sources
  1. NIH ODS — Potassium Fact Sheet for Health Professionals (Updated: June 2, 2022) — Introduction + Table 1 Adequate Intakes · read 2026-08-27
    what it says
    “Potassium, the most abundant intracellular cation … required for proper nerve transmission, muscle contraction, and kidney function … [AI, 19–50 years] 3,400 mg (male), 2,600 mg (female), 2,900 mg (pregnancy), 2,800 mg (lactation)”
  2. NIH ODS — Potassium Fact Sheet for Health Professionals (Updated: June 2, 2022) — Dietary Supplements · read 2026-08-27
    what it says
    “In dietary supplements, potassium is often present as potassium chloride, but many other forms—including potassium citrate … and gluconate—are also used … Many dietary supplement manufacturers and distributors limit the amount of potassium in their products to 99 mg”
  3. NIH ODS — Potassium Fact Sheet for Health Professionals (Updated: June 2, 2022) — Health Risks from Excessive Potassium (UL) · read 2026-08-27
    what it says
    “Although case reports indicate that very large doses of potassium supplements can cause heart abnormalities and death, the NASEM committee concluded that these reports do not provide sufficient evidence to set a UL.”
  4. NIH ODS — Potassium Fact Sheet for Health Professionals (Updated: June 2, 2022) — Health Risks from Excessive Potassium (hyperkalemia) · read 2026-08-27
    what it says
    “in people with impaired urinary potassium excretion due to chronic kidney disease or the use of certain medications, such as angiotensin converting enzyme (ACE) inhibitors or potassium-sparing diuretics, even dietary potassium intakes below the AI can cause hyperkalemia”
  5. NIH ODS — Potassium Fact Sheet for Health Professionals (Updated: June 2, 2022) — Health Risks from Excessive Potassium (symptoms) + Dietary Supplements (side effects) · read 2026-08-27
    what it says
    “severe cases can cause muscle weakness, paralysis, heart palpitations, paresthesias (a burning or prickling sensation in the extremities), and cardiac arrhythmias that could be life threatening … Potassium supplements can cause minor gastrointestinal side effects”
  6. NIH ODS — Potassium Fact Sheet for Health Professionals (Updated: June 2, 2022) — Interactions with Medications · read 2026-08-27
    what it says
    “[ACE inhibitors/ARBs] These medications reduce urinary potassium excretion, which can lead to hyperkalemia … [potassium-sparing diuretics] reduce the excretion of potassium in the urine and can cause hyperkalemia … [loop/thiazide diuretics] increases urinary potassium excretion and can lead to hypokalemia”
  7. NIH ODS — Potassium Fact Sheet for Health Professionals (Updated: June 2, 2022) — Potassium and Health (hypertension) + Groups at Risk of Potassium Inadequacy · read 2026-08-27
    what it says
    “Results from most clinical trials suggest that potassium supplementation reduces blood pressure … in inflammatory bowel disease (including Crohn's disease and ulcerative colitis), potassium secretion increases, which can lead to poor potassium status … Large doses of laxatives … can also cause hypokalemia”
  8. FDA — Daily Value on the Nutrition and Supplement Facts Labels, Reference Guide: Daily Values for Nutrients (content current as of 03/05/2024) · read 2026-08-27
    what it says
    “DVs are the recommended amounts of nutrients to consume or not to exceed each day … Potassium 4700mg”
  9. HSA Singapore — Health Supplements Guidelines GL-CHPB-3-001 Rev. No. 020 (January 2026), clause 4.8 + Table 5 Minerals Limits (full nutrient column quoted — potassium is not listed) · read 2026-08-27
    what it says
    “should not contain vitamins and minerals exceeding the stipulated limits stated in Tables 4 and 5 … Table 5: Minerals Limits … Boron, Calcium, Chromium, Copper, Iodine, Iron, Magnesium, Manganese, Molybdenum, Phosphorus, Selenium, Zinc”
  10. HSA Singapore — Health Supplements Guidelines GL-CHPB-3-001 Rev. No. 020 (January 2026), List of Health Claims (vitamins and minerals) · read 2026-08-27
    what it says
    “73. Contribute to normal muscle function • Calcium, potassium, magnesium … 80. Maintain/support nervous system function • Copper, iodine, magnesium, potassium”
  11. HSA Singapore — Guidelines on Prohibited and Restricted Ingredients in Health Supplements and Traditional Medicines, GL-CHPB-1-012 Rev. No. 001 (October 2025), Annex A · read 2026-08-27
    what it says
    “Annex A: List of substances which are prohibited or restricted for use with … Annex B: List of substances with potential safety issues [potassium does not appear in either annex]”
  12. iHerb Singapore — Potassium category page (Supplements > Minerals > Potassium), default order, 87 results — positions 1, 2, 5, 7, 9 · read 2026-08-27
    what it says
    “21st Century, Potassium Gluconate, 595 mg, 110 Tablets … NOW Foods, Potassium Citrate, 99 mg, 180 Veg Capsules … Life Extension, Potassium with Extend-Release Magnesium … Vitacost, Potassium Citrate, 99 mg, 300 Capsules … NaturesPlus, Iodine, 150 mcg, 100 Tablets”
  13. NIH ODS — Potassium Fact Sheet for Health Professionals (Updated: June 2, 2022) — Sources of Potassium: Salt substitutes · read 2026-08-29
    what it says
    “Many salt substitutes contain potassium chloride … from about 440 mg to 2,800 mg potassium per teaspoon … those with kidney disease or who are taking certain medications, should consult their health care provider … because of the risk of hyperkalemia”
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Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.