Potassium

ElectrolytesKidneyBlood

Potassium supports heart, nerve and muscle function, as well as metabolism.

Why it matters: The body needs potassium for cells, muscles and nerves to work correctly, and for a healthy digestive system and bone health.

Source · Cleveland Clinic — what it is

Source · Cleveland Clinic — why it matters, what moves it

Reference Range
3.5 – 5.1mmol/L
3.5
5.1LowNormalHigh
What Moves It

May increase with:

Potassium supplements taken by mouth
A diet rich in potassium

May decrease with:

Vomiting or diarrhea
Laxative use
Eating disorders such as bulimia nervosa
Diuretic medicines
Some medicines including insulin, certain antibiotics and corticosteroids
Adrenal disorders such as primary aldosteronism and Cushing's syndrome
Chronic kidney disease
Related Markers
SodiumChlorideCreatinine
Common questions

What is Potassium?

Potassium supports heart, nerve and muscle function, as well as metabolism.

What might a high or low Potassium mean?

The body needs potassium for cells, muscles and nerves to work correctly, and for a healthy digestive system and bone health.

What is the typical reference range for Potassium?

The general-population reference range shown here is 3.5 – 5.1 mmol/L. Reference ranges describe the general population and are not a personal target — discuss your results with your physician.

What can affect Potassium?

It may be higher with: Potassium supplements taken by mouth, A diet rich in potassium. It may be lower with: Vomiting or diarrhea, Laxative use, Eating disorders such as bulimia nervosa, Diuretic medicines, Some medicines including insulin, certain antibiotics and corticosteroids, Adrenal disorders such as primary aldosteronism and Cushing's syndrome, Chronic kidney disease.

More in Electrolytes
CalciumCalcium/Albumin RatioCalcium/Phosphorous RatioChlorideIonized CalciumMagnesiumPhosphorusPTHSodiumSodium/Potassium Ratio

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