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Potassium

What it measures

Potassium is an electrolyte important for how your muscles, including your heart, contract.

Often reported in mmol/L. Reference ranges differ between laboratories, ages and sexes, so always compare with the range printed on your own report.

Why it matters

Because potassium is tightly regulated by the body, an unusual result is sometimes caused by how the sample was drawn or handled rather than a change in the body itself.

Questions worth asking

  • Could this be a lab or sample-handling artifact worth repeating?
  • Are any of my current medications known to affect potassium?
  • Should this be checked again soon rather than at a routine follow-up?

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Educational information only. Not a diagnosis, not treatment advice, and not a substitute for a licensed healthcare professional.