Mineral
Potassium (as potassium iodide)
Also known as: potassium, K, KI (when combined with iodine)
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.
Related in Mineral
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