Unsaturated Iron Binding
Private Unsaturated Iron Binding Capacity testing in London for £43, measuring one iron-transport marker with results expected in around 1–2 days.
Turnaround time
1-2 business days
Biomarkers count
1
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Overview of the Urea & Electrolyte Test
The Urea & Electrolyte blood test provides a core assessment of kidney function, waste handling, hydration and electrolyte balance.
The test assesses 1 profile biomarker: Urea and Electrolytes.
Urea is a nitrogen-containing waste product generated during protein metabolism.
The kidneys remove most Urea from the bloodstream.
Blood concentrations can rise when kidney filtration is reduced, but dehydration and other physiological factors can also increase Urea.
Electrolytes such as Sodium and Potassium are tightly regulated because they are essential for nerve activity, muscle contraction, fluid balance and normal cardiac electrical function.
Depending on the laboratory profile, Urea & Electrolytes commonly incorporates key measurements used to evaluate renal and electrolyte status.
Creatinine and eGFR are often interpreted alongside these markers when a broader kidney-function assessment is required.
A significant Potassium abnormality can be medically important because high or low concentrations can disturb heart rhythm.
Sodium abnormalities can reflect changes in water balance, medication, kidney disease, endocrine disorders or acute illness.
Urea can be affected by hydration and protein metabolism as well as renal function.
For this reason, individual components should be interpreted together rather than treating the profile as one simple kidney score.
Many commonly prescribed medicines can influence kidney function or electrolytes, including diuretics, ACE inhibitors, ARBs and anti-inflammatory medicines.
What Does the Urea & Electrolyte Test Check?
The test assesses a combined Urea and electrolyte profile relevant to kidney function and fluid balance. This test measures 1 profile biomarker.
Urea and Electrolytes
Provides a combined assessment of renal waste handling and major electrolyte balance, supporting evaluation of kidney function, hydration and medication effects.
Who May Benefit From the Urea & Electrolyte Test?
Urea and Electrolytes testing is widely used for routine kidney and medication monitoring.
People with known kidney disease - U&E testing can monitor changes in renal and electrolyte status.
People with high blood pressure - Kidney function and blood-pressure treatment are closely linked.
People taking ACE inhibitors or ARBs - These medicines can affect Potassium and kidney function.
People taking diuretics - Diuretics can alter Sodium, Potassium and hydration.
People with vomiting or diarrhoea - Fluid loss can disturb electrolytes.
People with dehydration concerns - Urea and Sodium can change with fluid balance.
People with unexplained weakness or muscle cramps - Electrolyte abnormalities are one possible cause.
People requiring routine renal monitoring - The profile is commonly used as a baseline test.
How to Prepare
Do not deliberately over-hydrate immediately before testing.
The result should reflect your usual physiological state unless a clinician has requested testing during an acute illness.
Symptoms and Reasons to Consider the Urea & Electrolyte Test
Kidney or electrolyte abnormalities can be asymptomatic or produce non-specific symptoms.
Persistent weakness or fatigue - Electrolyte and renal abnormalities can contribute.
Muscle cramps - Sodium or Potassium disturbance can affect muscle function.
Vomiting or diarrhoea - Fluid and electrolyte losses can become clinically important.
Swelling or fluid retention - Kidney dysfunction is one possible cause.
Reduced urine output - This can occur with significant renal dysfunction or dehydration.
Palpitations - Potassium disturbance can affect cardiac rhythm.
Confusion or dizziness during illness - Significant Sodium abnormalities can affect neurological function.
Severe weakness, confusion, fainting, markedly reduced urine output or significant Potassium abnormalities can require urgent medical assessment.
Routine private testing should not delay emergency treatment of major electrolyte disturbances.
How to Book Your Urea & Electrolyte Test
The Urea & Electrolyte profile can be booked privately for kidney and electrolyte assessment.
Choose the Urea & Electrolyte
Select the Urea & Electrolytes blood test online.
Select your sample collection option
Choose an in-clinic blood draw or professional home or hotel phlebotomy where suitable.
Attend your appointment
A trained healthcare professional collects the required venous blood sample.
Laboratory analysis
Your sample undergoes assessment of Urea and Electrolytes.
Receive your results securely
Your authorised results are delivered securely and can be interpreted alongside Creatinine and eGFR where required.
When Will I Receive My Results?
The current London Blood Tests turnaround for Urea & Electrolytes is approximately 1–2 days after laboratory receipt.
The profile currently costs £38.
Individual renal and electrolyte components are routinely processed once the specimen reaches the laboratory.
Understanding Your Results
Urea and electrolyte results should be interpreted together.
A raised Urea can occur with reduced kidney filtration, dehydration or increased protein breakdown.
A low Urea is often less clinically significant but can occur with low protein intake or high fluid intake.
A high or low Sodium usually reflects abnormalities of water and Sodium balance rather than dietary salt alone.
A high Potassium can occur with kidney dysfunction or selected medication and can become medically important when substantially elevated.
A low Potassium can occur with gastrointestinal losses and selected diuretics.
A broader kidney profile including Creatinine and eGFR may be required where renal filtration itself needs fuller assessment.
Why Book With London Blood Tests?
London Blood Tests provides private Urea & Electrolytes testing for kidney, hydration and electrolyte assessment.
Assesses core renal chemistry - Urea provides information about waste handling and hydration.
Evaluates electrolyte balance - Sodium and Potassium are essential to normal physiological function.
Useful for medication monitoring - Many cardiovascular medicines alter kidney function or electrolytes.
Relevant during dehydration or fluid loss - Gastrointestinal illness can significantly change results.
Can complement Creatinine and eGFR - A broader kidney profile can provide additional renal information.
Useful for repeat monitoring - Changes can be followed over time.
Fast laboratory turnaround - Results are expected approximately 1–2 days after laboratory receipt.
Clear pricing - The Urea & Electrolytes test costs £38.
Private Urea & Electrolyte Blood Test in London
London Blood Tests provides private Urea & Electrolytes testing for people requiring assessment of renal chemistry and electrolyte balance.
The test costs £38 and assesses 1 combined profile biomarker.
Results are expected approximately 1–2 days after laboratory receipt.
Significantly abnormal Sodium or Potassium results can require prompt clinical review.