Shows the balance between sodium and potassium, two electrolytes that support fluid, nerve, and muscle function.
The sodium to potassium ratio is a calculated value, not a separate blood test. It compares serum sodium and serum potassium, two electrolytes that together help control fluid balance, nerve signalling and blood pressure.
The formula is: sodium ÷ potassium, using the units reported by the lab.
Sodium and potassium work in opposition to manage fluid and pressure in the body. Looking at their ratio can add context to the individual values, and the dietary sodium to potassium balance has been linked with blood pressure and cardiovascular risk in population studies.
In blood, the ratio shifts when either electrolyte moves out of range, which can point toward kidney, adrenal or hydration issues. It is read as supporting context rather than a standalone diagnostic.
Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.
There is no firmly established healthy reference range for the serum sodium to potassium ratio, and it is interpreted mainly through its components. Each electrolyte has its own reference range, and a shifted ratio prompts a look at why. Read it as supporting context with a clinician rather than against a fixed cutoff.
Potassium is easily affected by sample handling, and haemolysis can falsely raise it and distort the ratio. Diuretics, ACE inhibitors and other medicines change both electrolytes, as do dehydration and kidney problems. The ratio should always be read with the actual electrolyte values.
Read with its components, sodium and potassium, and alongside kidney function tests, chloride, bicarbonate and blood pressure.
What does my sodium/potassium ratio mean? It compares sodium to potassium in your blood. A higher or lower ratio can signal an electrolyte imbalance that deserves a closer look.
Do I need to fast for this test? No. Eat and drink normally unless your clinician gives different instructions.
What can affect my results? Diuretics, ACE inhibitors, ARBs, NSAIDs, corticosteroids, potassium supplements, salt substitutes, hydration, heavy exercise, and sample handling can all shift results.
How often should I test this? It’s often checked when starting or adjusting medicines, or when electrolyte issues are suspected. Follow your clinician’s advice for timing.
How long do results take? Results are usually ready in about 7 days.
What should I discuss with my clinician? Share all medicines and supplements, salt intake, and any symptoms like weakness, cramps, dizziness, or swelling. Ask if follow-up tests are needed.
One annual membership, 100+ biomarkers, every result explained in plain language with a personalized action plan and concierge guidance.
