Condition Deep-Dives 10 min read·Updated 22 July 2026 Clinician-reviewed

Hypertensive Nephrosclerosis

A UK Consultant Nephrologist's deep-dive into hypertensive nephrosclerosis — the second-commonest cause of kidney failure in the UK, and the one where the cure (good BP control) is genuinely within reach.

  • Clinically Reviewed
  • NHS & NICE Aligned
  • UK Evidence-Based
  • Last Reviewed 22 July 2026

Professor Mohammed Mahdi Althaf

Consultant Nephrologist & Acute Physician

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Professor Mohammed Mahdi Althaf

MD, MSc, PgDip (Clin Ed), FRCP, FHEA, FASN

Consultant Nephrologist & Acute Physician · GMC 7216325

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Direct answer

Years of sustained high BP scars the small kidney arteries and glomeruli, leading to slow CKD. Tight BP control (<130/80), ACE/ARB first, and SGLT2 inhibitor add-on are the cornerstones.

Key recommendation: Second-commonest cause of kidney failure in the UK.

Quick answer

✓ Best choices

  • Fresh and frozen vegetables (unsalted)
  • Lower-potassium fruit if potassium is a concern; otherwise a wide variety
  • Whole grains and oats
  • Herbs, garlic, lemon, pepper and spices to flavour without salt

✓ Foods to limit

  • Table salt, stock cubes, soy sauce, gravy granules, jarred sauces
  • Processed meats and smoked fish
  • Ready meals, takeaway favourites and salty snacks
  • Liquorice tea and excessive caffeine

Key takeaway

Years of sustained high BP scars the small kidney arteries and glomeruli, leading to slow CKD. Tight BP control (<130/80), ACE/ARB first, and SGLT2 inhibitor add-on are the cornerstones.

Who should be cautious

People on dialysis, post-transplant, pregnant or breastfeeding, or taking prescription medication — confirm with your renal team before changes.

Hypertensive Nephrosclerosis

Mechanism and diagnosis

Mechanism

  • Sustained high pressure damages the afferent arteriole
  • Hyalinosis → narrowing → ischaemia of the glomerulus
  • Glomeruli scar (global glomerulosclerosis)
  • Tubules atrophy, interstitium fibroses
  • Kidneys shrink — typically <9 cm bipolar length on ultrasound

Typical Patient

  • Long-standing hypertension (often poorly controlled)
  • Mild-moderate proteinuria (ACR usually <100 mg/mmol)
  • Bland urine sediment
  • Bilateral small smooth kidneys on USS
  • Often overlap with vascular disease elsewhere (IHD, PVD, stroke)

BIOPSY is rarely needed — diagnosis is clinical. Biopsy ONLY if:

  • Heavy proteinuria (>300 mg/mmol — suggests another diagnosis)
  • Active sediment
  • Rapid eGFR decline
  • Atypical features

APOL1 high-risk genotype: consider in patients of West African ancestry with rapid progression — separate entity sometimes called 'APOL1 nephropathy'.

Treatment

BP Targets (NICE Ng203)

  • <140/90 in CKD without proteinuria
  • <130/80 in CKD with ACR >70 mg/mmol
  • Many specialists target <130/80 in ALL CKD
  • Avoid <110 systolic in frail elderly (J-curve risk)

Drug Sequence

  1. ACE inhibitor (ramipril, lisinopril) or ARB (losartan, irbesartan, candesartan)
  2. Add CCB (amlodipine 5-10 mg)
  3. Add thiazide-like diuretic (indapamide 2.5 mg) — use loop diuretic instead if eGFR <30
  4. Add spironolactone 25 mg (only if eGFR ≥45, K <4.5)
  5. Other options: doxazosin, hydralazine, minoxidil, centrally-acting agents

SGLT2 INHIBITOR: dapagliflozin or empagliflozin if eGFR ≥20 and ACR >22 — even without diabetes (EMPA-KIDNEY trial).

Lifestyle

  • Salt <6 g/day (single biggest BP lever)
  • Weight loss if BMI >25
  • Alcohol <14 units/week
  • Aerobic exercise 150 min/week
  • Smoking cessation
  • DASH or Mediterranean diet
  • Caffeine <400 mg/day
  • Stress / sleep (treat OSA)

Monitoring and complications

Home BP Monitoring

  • Validated upper-arm monitor (Omron M3/M7)
  • Twice morning + twice evening, 7 days
  • Average — clinic readings are 5-10 mmHg higher
  • Target home average <125/75 if clinic target <130/80

Follow-up

  • 3-6 monthly U&E + ACR
  • 12-monthly retinal screening (consider, if diabetic)
  • ECG — LVH common
  • Echocardiogram if symptomatic

Co-management

  • Statin (almost all)
  • Aspirin if vascular disease
  • Treat OSA, gout, anaemia of CKD
  • CKD-MBD work-up at eGFR <45

REFER TO NEPHROLOGY when:

  • eGFR <30
  • ACR >70 (any eGFR)
  • Rapidly falling eGFR (>5/year)
  • BP refractory despite 4 drugs (resistant hypertension)
  • Suspected secondary hypertension (Conn's, renal artery stenosis, phaeochromocytoma)
High Blood Pressure and Your Kidneys
Related reading: High Blood Pressure and Your Kidneys.

Key practical tips

Designed for quick scanning — what to order, what to avoid, sensible portions, common mistakes.

  • Aim for sodium ≤ 0.3 g per 100 g on labels (green/low)
  • Never use 'LoSalt' or potassium-based salt substitutes in CKD
  • Home BP monitoring 1–2 weeks before any change helps you see the impact

Clinical guidance

TL;DR summary

Years of sustained high BP scars the small kidney arteries and glomeruli, leading to slow CKD. Tight BP control (<130/80), ACE/ARB first, and SGLT2 inhibitor add-on are the cornerstones.

Key takeaways
  • Second-commonest cause of kidney failure in the UK.
  • Disproportionately affects Black African/Caribbean patients (APOL1).
  • Target BP <130/80 in CKD.
  • ACE inhibitor or ARB first-line.
  • Home BP monitoring beats clinic readings for accuracy.
Kidney Diet & Nutrition Considerations

Blood-pressure control is the single biggest dietary lever for protecting the kidneys. UK adults average around 8–9 g of salt a day; NICE and the British Heart Foundation recommend ≤ 6 g (about 2.4 g sodium). The DASH pattern — vegetables, fruit, whole grains, low-fat dairy and lean protein — lowers systolic BP by 8–14 mmHg in trials, comparable to a single antihypertensive.

Foods to prioritise

  • Fresh and frozen vegetables (unsalted)
  • Lower-potassium fruit if potassium is a concern; otherwise a wide variety
  • Whole grains and oats
  • Herbs, garlic, lemon, pepper and spices to flavour without salt

Foods to limit

  • Table salt, stock cubes, soy sauce, gravy granules, jarred sauces
  • Processed meats and smoked fish
  • Ready meals, takeaway favourites and salty snacks
  • Liquorice tea and excessive caffeine

Potassium, phosphate and protein needs vary between individuals — please confirm personal targets with your renal team or dietitian. Browse the Kidney Diet Hub for more guides in this cluster.

Frequently asked questions

What is hypertensive nephrosclerosis?

Chronic kidney damage caused by sustained high blood pressure. Small intrarenal arteries thicken (arteriolar hyalinosis), glomeruli scar (global glomerulosclerosis), and the kidneys shrink and lose function over decades.

How is it different from malignant hypertension?

Hypertensive nephrosclerosis is the SLOW form — years of moderate BP elevation. Malignant (accelerated) hypertension is an emergency — BP >180/120 with end-organ damage (papilloedema, AKI, microangiopathic haemolysis), needing urgent admission.

What is the BP target?

NICE NG136/NG203: <130/80 for CKD patients (and <130/80 if proteinuric). Use ACE inhibitor or ARB first-line, then add calcium channel blocker, then thiazide-like diuretic (indapamide). Avoid spironolactone if eGFR <30.

What is APOL1?

Apolipoprotein L1 — two high-risk gene variants common in people of West African ancestry. High-risk genotype roughly quadruples the risk of progression from hypertension to kidney failure. Genetic testing is increasingly used.

How much salt is safe with kidney disease?

Adults with chronic kidney disease should aim for under 6 g of salt (about 2.4 g sodium) a day, and many renal teams recommend closer to 4–5 g. Avoid potassium-based salt substitutes such as 'LoSalt' — they can cause dangerous hyperkalaemia in CKD.

Nutritional challenges in kidney disease

Many people living with kidney disease have to limit foods because of potassium, phosphate, diabetes, dialysis, appetite changes or simply the time it takes to cook from scratch every day. That can make it harder to keep daily nutrition balanced — particularly for vitamins and minerals that food alone may not fully cover.

Kidney Vitality is a UK-formulated daily nutritional support product designed by Consultant Nephrologist Professor Mohammed Mahdi Althaf with renal nutrition in mind from the start. It keeps doses moderate, leaves out added potassium, phosphate and magnesium, and avoids megadose vitamin A — sitting alongside a kidney-friendly diet, not replacing it.

Why Kidney Vitality fits this need

Built around UK renal guidance

Aligned with NICE NG136 (hypertension), NG203 (CKD) and KDIGO 2024.

Designed by a UK Consultant Nephrologist

Formulated and reviewed by Professor Mohammed Mahdi Althaf (GMC 7216325).

Evidence-based by design

Practical UK guidance for adults with BP-driven kidney disease.

Designed by a UK Consultant Nephrologist

Ready to support your kidney health?

If you have been researching kidney health, supplements, CKD nutrition or kidney-friendly living, Kidney Vitality was developed specifically around those principles by Professor Mohammed Mahdi Althaf (GMC 7216325). Nephrologist Developed Daily Multivitamin.

  • No Added Potassium
  • No Added Magnesium
  • No Added Phosphorus
  • No Added Iron
  • One capsule daily
  • UK GMP — BRCGS, NSF GMP, Halal
Subscribe & Save — £20.39/monthCheck your current multivitamin

✓ Free UK tracked delivery  ·  ✓ Delivered every 30 days  ·  ✓ Pause or cancel anytime  ·  ✓ Never run out

ComparisonKidney VitalityTypical high-street multivitamin
Added potassiumNoneOften included
Added phosphateNoneOften included (E338–E452)
Vitamin A (retinol)No megadoseOften high-dose retinol
Kidney-focused formulationYesNo — general population
Consultant Nephrologist involvementYes (GMC 7216325)No
UK GMP manufacturedYes (BRCGS, NSF GMP)Varies

Food supplement. Not a medicine and not a treatment for kidney disease. Speak with your GP, pharmacist or renal team before starting any new supplement, especially in advanced CKD, on dialysis, post-transplant, pregnant or breastfeeding.

Clinical reviewer

Professor Mohammed Mahdi Althaf

Consultant Nephrologist

Acute Physician

GMC 7216325

View Full Biography

Professor Mohammed Mahdi Althaf is a UK Consultant Nephrologist and Acute Physician with a special interest in chronic kidney disease, AKI prevention and renal nutrition. He combines hospital practice with patient education and clinical guidance review.

View professional profile →
View Credentials
  • MD
  • MSc
  • PgDip (Clin Ed)
  • FRCP
  • FHEA
  • FASN

About this article

Written for UK patients and based on:

  • NICE guidance
  • NHS resources
  • British Dietetic Association guidance
  • Kidney Care UK resources
View methodology

Each article is researched against current UK clinical guidance (NICE NG203, NG118, NG136), NHS patient resources, KDIGO and KDOQI international guidelines, and the British Dietetic Association Renal Nutrition Group. Drafts are written by the Kidney Vitality editorial team and reviewed by a UK Consultant Nephrologist before publication. Content is reviewed on a rolling basis and updated when guidance changes.

Editorial standards

  • Clinically reviewed
  • NHS-aligned
  • NICE-aligned
  • Evidence-based
  • Reviewed before publication
View full editorial process

Every article is researched and written by the Kidney Vitality editorial team using current UK clinical guidance (NICE NG203, NG118, NG136), NHS patient resources, KDIGO/KDOQI international guidelines, and British Dietetic Association renal nutrition guidance. Drafts are reviewed for clinical accuracy by Professor Mohammed Mahdi Althaf, MD, MSc, PgDip (Clin Ed), FRCP, FHEA, FASN (Consultant Nephrologist & Acute Physician, GMC 7216325) before publication. Content is updated when UK guidance changes.

References (4)View Sources
  1. NICE NG203: Chronic kidney disease — assessment and management
  2. KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of CKD
  3. KDOQI Clinical Practice Guideline for Nutrition in CKD: 2020 Update
  4. British Dietetic Association — Renal Nutrition Group

Medical disclaimer

This content is educational only and does not replace personalised medical advice.

Read full disclaimer

This page is general information, not personal medical advice. If you have chronic kidney disease, are on dialysis, have had a kidney transplant, are pregnant or breastfeeding, or take prescription medication, please confirm any supplement with your GP, pharmacist or renal team before starting.

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