<h2>Key Insights</h2>
<ul>
<li>Measure the aldosterone hormone to understand blood pressure control and potassium balance, and to spot adrenal-driven causes of hypertension early.</li>
<li>See patterns with electrolytes and kidney markers that can explain fatigue, muscle cramps, or hard-to-control blood pressure.</li>
<li>Clarify whether results point toward hormonal, renal, or volume-related changes rather than purely “essential” hypertension.</li>
<li>Support proactive care planning for resistant hypertension, low or high potassium, or suspected adrenal gland function issues.</li>
<li>Track trends over time to monitor recovery or response after clinical treatment or lifestyle changes.</li>
<li>Inform conversations with your clinician about follow-up testing, including the aldosterone renin ratio, imaging, or medication review.</li>
</ul>
<h2>What Is an Aldosterone Test?</h2>
<p>An aldosterone test measures the amount of the aldosterone hormone produced by your adrenal glands. Most commonly, it’s a blood test (plasma aldosterone concentration). In some cases, a 24-hour urine test is used to assess total daily output. Results are often paired with renin to calculate the aldosterone renin ratio (ARR), the preferred screening tool for primary aldosteronism. Clinically, it’s used for evaluating stubborn high blood pressure, unexplained low potassium, suspected adrenal disorders, or for monitoring after treatment. Results reflect your current state and can be influenced by posture, time of day, sodium intake, and certain medications.</p>
<p>Why it matters: aldosterone function helps your kidneys retain sodium and excrete potassium, which influences blood volume and blood pressure. When aldosterone is too high, blood pressure often rises and potassium falls. When it’s too low, blood pressure can drop and potassium can climb. The test doesn’t diagnose on its own, but it’s a key signal that, when combined with electrolytes, kidney function, renin, and blood pressure history, helps pinpoint whether the issue is adrenal, renal, or something else.</p>
<h2>Why Is It Important to Test For Aldosterone?</h2>
<p>Aldosterone sits at the intersection of blood pressure, electrolytes, and adrenal gland function. If you’ve got hypertension that laughs at two or more medications, frequent muscle cramps or weakness, or swings in potassium, testing can separate normal variation from a true hormone-driven imbalance. Elevated levels raise suspicion for hyperaldosteronism (overproduction from the adrenal glands), which can come from a small adrenal nodule or adrenal hyperplasia. Low levels, especially alongside fatigue, dizziness on standing, and high potassium, can point toward mineralocorticoid deficiency in adrenal insufficiency. Testing is especially helpful when symptoms ramp up during periods of stress, major dietary shifts, or aging, when regulatory systems are more vulnerable.</p>
<p>Big picture: this is preventive, precision care. A single number helps, but patterns are powerful. Aldosterone, interpreted with renin (ARR), sodium and potassium, kidney filtration, and your blood pressure readings, offers a far more accurate story than any one result. Tracking over time — especially after medication adjustments or targeted therapy — clarifies whether you’re moving toward stability or need further evaluation with a clinician.</p>
<h2>What Insights Will I Get From an Aldosterone Test?</h2>
<p>Your report shows a numerical result with a reference range. Clinicians interpret aldosterone relative to personal baseline, posture and timing of the draw, and companion markers. The most useful read often comes from the aldosterone renin ratio, which indicates whether aldosterone is inappropriately high compared to renin’s drive signal.</p>
<p>Within reference range typically suggests steady sodium retention and potassium excretion for your current state, especially if potassium and blood pressure are also stable. Reference ranges are population-based; “normal” may not equal “optimal” for you if you’re symptomatic, so trends and context matter.</p>
<p>Elevated aldosterone can suggest hyperaldosteronism, a common and under-recognized cause of resistant hypertension. In primary hyperaldosteronism, aldosterone is high while renin is suppressed, often lowering potassium and raising blood pressure. Secondary elevations can arise when the kidneys are under-perfused (for example, with renal artery narrowing) or during states of fluid loss, where renin is high and aldosterone is appropriately responsive. Low aldosterone may point to adrenal insufficiency or reflect medication effects or very high sodium intake. None of these patterns are diagnoses — they guide the next right test, repeat measurement, or targeted clinical review.</p>
<p>Limitations and context matter. Salt intake, posture during collection, time of day, and several blood pressure drugs can shift results. Assay methods differ across labs, so small variations happen. Pairing results with electrolytes like potassium and sodium adds clarity. If you’re tracking the full picture, our Baseline Blood Panel includes sodium, potassium, and kidney markers that work hand in hand with aldosterone interpretation for blood pressure and volume status insights https://app.superpower.com/services/v2-baseline-blood-panel-bioref. You can also explore individual biomarkers such as Potassium https://superpower.com/biomarkers/potassium-test, Sodium https://superpower.com/biomarkers/sodium-test, eGFR for kidney function https://superpower.com/biomarkers/estimated-glomerular-filtration-rate-egfr-test, and Cortisol for broader adrenal context https://superpower.com/biomarkers/cortisol-test.</p>
<h2>How Aldosterone Works in Your Body</h2>
<p>Think of aldosterone function as a finely tuned fluid-and-mineral thermostat. When blood volume dips or the kidneys sense low pressure, renin rises, angiotensin II forms, and the adrenal cortex releases aldosterone. The kidneys respond by pulling sodium back into the bloodstream and sending potassium into the urine. Sodium brings water with it, restoring volume and stabilizing blood pressure. When this system is overactive independent of renin, blood pressure can climb even if everything else looks “normal.” That’s the logic behind using the aldosterone renin ratio to detect primary aldosteronism early.</p>
<h2>When Testing Is Especially Useful</h2>
<p>Certain real-world patterns flag value in measuring the aldosterone hormone: blood pressure that stays high despite multiple medications; low potassium without a clear trigger; new hypertension in younger adults; or family history of early strokes. In pregnancy, aldosterone often rises physiologically while renin is also elevated, so interpretation requires obstetric context. In older adults, medication mixes and vascular changes can shift results, making careful ARR-based reading even more important.</p>
<h2>Common Factors That Influence Results</h2>
<p>Because the renin–angiotensin–aldosterone system responds to posture, salt, and volume, preparation and documentation improve interpretability. High or very low salt intake, dehydration, and recent strenuous exercise can move the needle. Several medications — including diuretics, ACE inhibitors, ARBs, beta blockers, oral contraceptives, and licorice products — can alter renin, aldosterone, or both. Labs may recommend morning collection and consistent posture before the draw; your clinician will set the strategy that fits your situation.</p>
<h2>How This Test Fits Into Care</h2>
<p>If aldosterone and ARR suggest primary hyperaldosteronism, clinicians often confirm with standardized suppression testing and, when appropriate, adrenal imaging. If a unilateral adrenal source is suspected, targeted procedures may be discussed. If secondary drivers are likely, kidney blood flow, volume status, and medication effects are reviewed. For low aldosterone patterns, evaluation may focus on adrenal gland function and related hormones. Throughout, repeating the test after adjusting confounders is a common, evidence-based step.</p>
<h2>Related Markers You May Track</h2>
<p>Because hormones act in networks, many people follow a short list of companion markers. Potassium and sodium reflect aldosterone’s downstream effects; eGFR gauges kidney handling of fluid and electrolytes; and cortisol or DHEA-S can round out an adrenal snapshot. Explore Potassium https://superpower.com/biomarkers/potassium-test, Sodium https://superpower.com/biomarkers/sodium-test, eGFR https://superpower.com/biomarkers/estimated-glomerular-filtration-rate-egfr-test, Cortisol https://superpower.com/biomarkers/cortisol-test, and DHEA-S https://superpower.com/biomarkers/dhea-sulfate-dhea-s-test to build a more complete picture over time.</p>
<h2>Bottom Line</h2>
<p>Measuring the aldosterone hormone helps explain why blood pressure behaves the way it does and why potassium strays high or low. The real power shows up when results are interpreted with renin as the aldosterone renin ratio, and then aligned with electrolytes, kidney function, and your lived experience. Use the number as a compass, not a verdict — a clear, science-based signal that guides smarter next steps with your clinician.</p>