The main cation electrolyte is located primarily in the intra-cellular fluid with only a small amount found in the plasma, though the relationship is proportionate. Potassium is involved in muscle contraction, nerve conduction, osmotic pressure, pH balance and cellular transport via the sodium-potassium pump. Levels may indicate cellular damage, adrenal dysfunction, tissue destruction acid base balance, insulin dysregulation, dehydration, kidney dysfunction or dehydration.

Available Tests