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Find the right blood test for you.

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Showing 1–2 of 2 tests.

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Magnesium, RBC

1 biomarker

Measures magnesium inside red blood cells rather than in serum. Reflects longer-term magnesium status, since most of the body's magnesium sits inside cells. View details →

Vitamins & Nutrients Electrolytes

$13

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Potassium, Serum

1 biomarker

Measures potassium in the blood, an electrolyte essential for nerve signals, muscle contraction and heart rhythm. Levels outside the normal range can affect the heart. View details →

Electrolytes Kidney +1 more

$3

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