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Mineral

Potassium (as potassium iodide)

Also known as: potassium, K, KI (when combined with iodine)

A
Evidence

An essential electrolyte critical for nerve and muscle function, heart rhythm, and blood pressure regulation. Potassium iodide is a dual-purpose compound that delivers both potassium and iodine in one ingredient.

Primary uses

  • Electrolyte balance
  • Nerve and muscle function
  • Heart rhythm regulation
  • Blood pressure support

How it works

  • Maintains intracellular fluid osmolarity
  • Essential for sodium-potassium ATPase pump function
  • Supports cardiac action potentials
  • Required for proper muscle contraction

Dosage

Typical range
In multivitamins, typically minimal amounts (under 10 mg); adequate intake for adults 51+ is 1,000-1,200 mg daily from food sources primarily
Timing
With meals to avoid GI upset
With food
Should be taken with food to prevent stomach irritation
Duration
Multivitamin amounts are typically very low and safe; high-dose supplementation requires medical supervision
Special populations
Individuals with kidney disease, heart disease, or taking ACE inhibitors/ARBs should consult healthcare provider; those on certain blood pressure medications need monitoring

Forms

  • Potassium iodide· 70/100
  • Potassium citrate· 70/100
  • Potassium gluconate· 70/100
  • Potassium chloride· 70/100

Safety

Common side effects

  • GI upset when taken on empty stomach

Contraindications

  • Kidney disease or renal impairment
  • Use with ACE inhibitors, ARBs, NSAIDs without medical supervision
  • Certain cardiac conditions

Evidence notes

Extensive evidence for essential role in electrolyte balance and cardiovascular health; well-characterized mechanisms; strong evidence for cardiovascular benefits from adequate intake.

Grade A: Multiple well-designed human trials support the main claims.

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider.