Kidney Function Blood Test, Quietly Check What Your Kidneys Are Coping With
High blood pressure. Borderline diabetes. Extra weight. Painkillers. Long term meds.
On the outside, you are functioning. On the inside, your kidneys take the hit, day after day.
The problem is simple. Kidney damage is silent until it is advanced.
No obvious pain. No big warning sign. By the time you feel really unwell, a lot of damage can already be done.
A Kidney Function Blood Test is a straightforward way to find out if your kidneys are coping well or starting to struggle.
At Holden’s Wellness Clinics in Doncaster and Newark, you can book a fast, private kidney check without waiting for an NHS review or chasing appointments.
🧪 What A Kidney Function Blood Test Checks
Kidney function tests look at key markers in your blood that show how well your kidneys are filtering waste and balancing salts and fluids.
- Creatinine – waste product filtered by the kidneys, rises when filtering slows
- Urea – reflects protein breakdown and kidney clearance
- Sodium and potassium – essential salts that kidneys help to control
- eGFR – estimated glomerular filtration rate, an overall score of kidney performance
Together, these markers show if your kidney function is in a healthy range, mildly reduced, or low enough that it needs serious attention.
Price: £49
Lab: London Medical Laboratory, CQC registered UK partner lab
Results: usually within 24 to 48 hours by secure email
⚠️ Kidney Damage Is Often Silent
You can have moderate chronic kidney disease and still feel mostly fine day to day. No dramatic symptoms. Just a slow decline in background.
If it is not picked up early, reduced kidney function can lead to:
- Hard to control high blood pressure
- Fluid retention, ankle swelling, puffiness around the eyes
- Breathlessness and low energy
- Dangerous shifts in potassium and other salts
- Increased risk of heart attack and stroke
- End stage kidney failure, dialysis, transplant
The aim is simple. Catch any decline early, while lifestyle and medication can still protect kidney function, instead of waiting until it is too late to reverse.
👤 Who This Test Is Really For
This test is ideal if any of this sounds like you:
- You have high blood pressure now or in the past
- You have type 2 diabetes or have been told you are pre diabetic
- There is a family history of kidney disease, dialysis or transplant
- You take regular painkillers like ibuprofen or naproxen
- You are on long term tablets for blood pressure, diabetes or heart disease
- You sometimes notice ankle swelling or getting up more at night to pass urine
- You had blood tests before and were told your kidney numbers were “borderline” or “acceptable for your age”
You do not need to tick every box. Even one or two of these is enough reason to stop guessing and get your kidneys checked properly.
💊 Painkillers, Medication And Kidney Load
Your kidneys work hardest when you have a mix of risk factors. For example:
- High blood pressure plus regular ibuprofen for aches and pains
- Diabetes plus dehydration plus heavy exercise
- Blood pressure tablets plus other long term medication
None of these automatically means your kidneys are damaged.
But together, they increase the workload. A Kidney Function Test is a sensible check if you live on this kind of mix.
🤷 “My GP Said It Was Fine For My Age”
We often hear:
“They said my kidney function was a bit down but nothing to worry about yet.”
That leaves you in limbo.
Too abnormal to feel relaxed, but not urgent enough for the system to chase.
A private test lets you see clearly if your kidney numbers are:
- Back in the normal range
- Stable but mildly reduced
- Sliding slowly in the wrong direction
If things are steady, you gain peace of mind. If they are drifting, you have hard evidence to take back to your GP and ask for help before it is serious.
🏥 NHS Kidney Testing Versus Private Testing
NHS Route
- Usually tied to annual or occasional reviews for blood pressure or diabetes
- Harder to get tests if you do not tick enough high risk boxes
- Results may not be fully explained if they sit inside a wide “acceptable” range
- Repeat tests can be delayed by waiting lists and appointment backlogs
Holden’s Private Route
- No referral needed – you choose when to be checked
- Short, discreet appointments in our Doncaster or Newark clinics
- Blood taken by trained clinicians in a private room
- Samples sent same day to London Medical Laboratory
- Results usually in 24 to 48 hours, delivered by secure email
- Easy to repeat if you want to track changes over time
We are not replacing your GP. We are giving you fast, clear information so you can protect your kidneys and have better conversations with your doctor.
Book A Kidney Function Blood Test
🧭 Building A Bigger Picture Of Your Health
A Kidney Function Blood Test works well alongside:
- HbA1c Diabetes Blood Test – checks long term blood sugar control
- Cholesterol And Lipid Profile – heart and artery risk
- Liver Function Blood Test – alcohol, fatty liver and medication load
- Full Blood Count (FBC) – anaemia, infection and general health
These tests together show how your main organs are coping with your lifestyle, medications and past health history.
🩺 How The Appointment Works
- Book online and choose either Doncaster or Newark as your clinic location.
- Attend your appointment at Holden’s Wellness Clinic inside the pharmacy.
- Blood sample taken by a clinician, usually in 10 to 15 minutes.
- Sample sent same day to London Medical Laboratory.
- Results emailed securely, usually within 24 to 48 hours.
📍 Clinics Offering Kidney Function Blood Tests
- Holden’s Wellness Clinic – Doncaster (DN5)
Inside Holden’s Chemist Scawsby, Unit 4 Barnsley Road - Holden’s Wellness Clinic – Newark (NG24)
Inside Holden’s Chemist Express, 77b Eton Avenue
Related Blood Tests
- Liver Function Test (LFT) – liver and kidney health are closely connected, especially in fatigue, nausea or long-term medication use.
- HbA1c (Diabetes Test) – diabetes is one of the most common causes of kidney damage; highly recommended if you have thirst, frequent urination or weight changes.
- CRP Inflammation Test – useful if you have pain, swelling, infection symptoms or inflammation-related kidney issues.
- Full Blood Count (FBC) – checks for infection, anaemia, or inflammation that may contribute to kidney symptoms.
- Thyroid Function Test – thyroid imbalances can cause high/low blood pressure, swelling and fatigue, and often appear alongside kidney issues.
- Iron & Ferritin Test – low iron can cause fatigue, breathlessness and dizziness, and may impact kidney health in chronic conditions.
- Vitamin D Test – kidney problems can lower vitamin D levels; low vitamin D also contributes to tiredness, bone aches and low immunity.
- Vitamin B12 Test – useful for fatigue, tingling, low mood and nerve-related symptoms that can overlap with kidney conditions.
- Male Hormone Profile – for men with low energy, low drive or muscle loss, which can worsen with chronic kidney or metabolic issues.
- Female Hormone Profile – for women experiencing fatigue, fluid retention or cycle changes alongside kidney symptoms.