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Micronutrients

Potassium

Key mineral for water balance and cardiovascular health.

Definition

Potassium is the primary intracellular cation. It regulates water balance, cell membrane potential, muscle contraction, and contributes to blood pressure regulation.

How it works

Potassium counterbalances the effects of sodium on blood pressure — a high potassium/sodium ratio is associated with lower tension. It is necessary for nerve transmission and cardiac contraction. Deficiency (hypokalemia) can cause dangerous arrhythmias.

Role

Regulation of blood pressure, cardiac and skeletal muscle contraction, acid-base balance.

Examples

  • Banana (380mg/100g)
  • Avocado (485mg)
  • Potato (480mg)
  • Legumes (400-800mg)

Recommendations

ANC: 3500mg/day. Increasing fruits and vegetables is the best strategy to meet needs.

Key takeaway

Increasing fruits and vegetables is more effective for blood pressure than just reducing salt.

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