Aldosterone
Private Aldosterone testing in London for £99, measuring one adrenal hormone involved in fluid and electrolyte balance with results in around 6 days.
Turnaround time
6 business days
Biomarkers count
1
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Overview of the Aldosterone Blood Test
The Aldosterone blood test measures aldosterone, a steroid hormone produced by the outer part of the adrenal glands.
The test assesses 1 adrenal hormone marker: Aldosterone.
Aldosterone plays a central role in regulating sodium, potassium, fluid balance and blood pressure.
Its production is closely linked to the renin-angiotensin-aldosterone system.
When blood volume or kidney perfusion falls, the kidneys can release renin.
This activates a hormonal pathway that ultimately stimulates Aldosterone production.
Aldosterone then acts mainly on the kidneys to retain sodium and water while promoting potassium excretion.
Because Aldosterone is part of this regulatory system, the result can be difficult to interpret in isolation.
Renin measurement is frequently important alongside Aldosterone, particularly when primary aldosteronism is being investigated.
The Aldosterone-to-Renin Ratio can provide considerably more information than either hormone alone in that setting.
Aldosterone can be influenced by posture, time of day, sodium intake, potassium concentration and several medications.
These factors mean preparation and clinical context matter more for Aldosterone than for many routine blood markers.
A high Aldosterone result can occur in several circumstances.
Primary aldosteronism is one important cause, particularly when Aldosterone is inappropriately elevated relative to Renin.
Secondary increases can occur when the renin-angiotensin system is activated.
Low Aldosterone can also occur with selected adrenal, kidney or medication-related conditions.
The result should therefore be interpreted alongside Renin, blood pressure, Sodium, Potassium and the clinical reason testing was requested.
What Does the Aldosterone Blood Test Check?
The test measures Aldosterone, an adrenal hormone involved in sodium retention, potassium regulation, fluid balance and blood-pressure control. This test measures 1 specialist biomarker.
Aldosterone
Measures the adrenal hormone Aldosterone, supporting investigation of fluid balance, sodium and potassium regulation and selected causes of abnormal blood pressure.
Who May Benefit From the Aldosterone Blood Test?
Aldosterone testing is particularly relevant where adrenal hormone activity, electrolyte abnormalities or difficult-to-explain blood-pressure changes are being investigated.
People with persistent high blood pressure - Aldosterone and Renin testing can contribute to investigation of secondary hypertension.
People with hypertension and low Potassium - This combination can raise suspicion of inappropriate Aldosterone excess.
People with resistant hypertension - Blood pressure remaining high despite several medications can prompt investigation for primary aldosteronism.
People with an adrenal abnormality discovered on imaging - Hormone testing may be required to determine whether an adrenal lesion is functionally active.
People with unexplained low blood pressure or electrolyte abnormalities - Aldosterone may be assessed alongside Cortisol and other adrenal markers.
People with previous abnormal Aldosterone results - Repeat testing under controlled conditions can help clarify the pattern.
People undergoing investigation of the Renin-Aldosterone system - Measuring the hormones together provides more useful information than Aldosterone alone in many situations.
People referred for endocrine assessment of blood pressure - Aldosterone is a recognised part of selected endocrine hypertension investigations.
How to Prepare
Preparation can materially affect Aldosterone results.
If the test is being used to investigate primary aldosteronism, follow the exact medication, posture, timing and dietary instructions provided by the clinician or laboratory.
Symptoms and Reasons to Consider the Aldosterone Blood Test
Aldosterone abnormalities can influence blood pressure and electrolytes, although symptoms are often non-specific.
Persistent or difficult-to-control high blood pressure - Excess Aldosterone can contribute to sodium retention and hypertension.
Low Potassium on previous blood tests - Aldosterone excess can promote renal potassium loss.
Muscle weakness or cramps with low Potassium - Significant potassium disturbance can affect neuromuscular function.
Frequent headaches associated with severe hypertension - Blood-pressure symptoms warrant proper clinical assessment.
Unexplained dizziness or low blood pressure - Reduced Aldosterone activity can contribute to salt and fluid loss in selected conditions.
Abnormal Sodium or Potassium results - Electrolyte changes can prompt investigation of adrenal and renal hormone regulation.
An adrenal lesion found on imaging - Hormonal assessment may be required where adrenal function is uncertain.
A previous abnormal Aldosterone result - Repeat measurement can be useful when collection conditions are carefully documented.
Aldosterone should usually not be interpreted without considering Renin, Potassium, Sodium, blood pressure and medication.
Severe hypertension, marked weakness from electrolyte disturbance, fainting or acute illness requires prompt clinical assessment.
Do not stop blood-pressure medication simply to improve the test result unless this has been specifically planned by the clinician supervising the investigation.
How to Book Your Aldosterone Blood Test in London
The Aldosterone test can be booked privately for focused assessment of this adrenal hormone.
Choose the Aldosterone
Select the individual Aldosterone blood test online.
Select your sample collection option
Choose an in-clinic blood draw or professional home or hotel phlebotomy where suitable and compatible with any timing or posture requirements.
Attend your appointment
A trained healthcare professional collects the required venous blood sample after the relevant preparation instructions have been followed.
Laboratory analysis
Your serum or plasma undergoes specialist measurement of Aldosterone.
Receive your results securely
Your authorised result is delivered securely and can be interpreted alongside Renin, electrolytes and blood-pressure findings.
When Will I Receive My Results?
The current live London Blood Tests page lists a turnaround of approximately 6 days after laboratory receipt for Aldosterone.
This is a specialist hormone assay.
The sample undergoes laboratory analysis, quality-control procedures and result authorisation.
Turnaround begins when the specimen reaches the laboratory rather than necessarily from the exact time of collection.
A complete investigation of the Renin-Aldosterone system can take longer if repeat or paired testing is required.
Understanding Your Results
The Aldosterone result must be interpreted in relation to the conditions under which the sample was collected.
Posture, sodium intake, Potassium, medication and time of day can all influence the concentration.
A raised Aldosterone result does not automatically diagnose primary aldosteronism.
Renin is crucial.
In primary aldosteronism, Aldosterone is typically inappropriately elevated relative to suppressed Renin.
The resulting Aldosterone-to-Renin Ratio can therefore provide more clinically useful screening information.
Aldosterone can also rise secondarily when Renin is increased because the body is responding to reduced effective circulating volume or altered kidney perfusion.
A low Aldosterone result can occur with selected adrenal disorders, kidney-related problems or medication effects.
The result should therefore be interpreted alongside Renin, Potassium, Sodium, blood pressure and wider adrenal assessment where appropriate.
Why Book With London Blood Tests?
London Blood Tests provides private access to specialist Aldosterone measurement for adrenal, electrolyte and blood-pressure investigation.
Measures a key adrenal hormone - Aldosterone regulates sodium retention, Potassium excretion and fluid balance.
Relevant to secondary hypertension investigation - Aldosterone can be important where an endocrine cause of high blood pressure is being considered.
Can complement Renin testing - The Aldosterone-to-Renin relationship provides important additional information.
Relevant to unexplained low Potassium - Aldosterone excess can contribute to renal Potassium loss.
Useful in adrenal assessment - Hormone testing may be relevant where an adrenal abnormality has been identified.
Specialist laboratory analysis - Samples undergo dedicated hormone measurement.
Professional blood collection - Clinic and appropriate home or hotel phlebotomy appointments are available.
Clear pricing - The Aldosterone test costs £99.
Private Aldosterone Blood Test in London
London Blood Tests provides private Aldosterone testing for people requiring assessment of adrenal hormone regulation, blood pressure or electrolyte balance.
The test costs £99 and assesses 1 specialist biomarker.
Results are expected approximately 6 days after laboratory receipt.
Aldosterone is most useful when interpreted alongside Renin, Sodium, Potassium, blood pressure and the precise circumstances of sample collection.