What is Kidney Disease (CKD)? — eGFR Stages, Creatinine & Treatment Guide India

Last Updated: March 2026 | Reading Time: 10 minutes | ~2,100 words

Chronic Kidney Disease (CKD) is one of India’s most rapidly growing health crises — yet it remains almost entirely silent in its early stages. India has an estimated 150–200 million people with some degree of kidney damage, with over 700,000 people reaching end-stage kidney failure (ESKD) annually. The tragedy: the kidneys can lose up to 60–70% of their function before a person feels any symptoms. By the time most Indians are diagnosed with CKD, they are already at stage 3 or 4 — and the window for prevention has closed. Understanding CKD, the eGFR and creatinine numbers, and the interventions that genuinely slow progression is life-saving knowledge for every Indian with diabetes or hypertension — the two diseases responsible for 60% of all CKD.

What Do the Kidneys Actually Do?

The kidneys are two bean-shaped organs (each about the size of a fist) sitting behind the abdominal organs on either side of the spine. Each kidney contains approximately one million tiny filtration units called nephrons. Their critical functions: filter 180 litres of blood daily, producing 1–2 litres of urine; excrete waste products (urea, creatinine, uric acid); regulate blood pressure (via renin-angiotensin system); regulate electrolytes (sodium, potassium, bicarbonate); produce erythropoietin (EPO) — the hormone that stimulates red blood cell production; activate Vitamin D (kidneys convert storage Vitamin D to active form for bone health). When kidneys fail, all these functions fail simultaneously — explaining why CKD causes such a wide range of symptoms across every organ system.

CKD Stages — The eGFR Classification

What is Creatinine? — Understanding Your Test Results

Serum creatinine is the most commonly measured kidney function test in India — but it is also the most misunderstood. Key facts: Creatinine is a breakdown product of creatine phosphate in muscle — produced at a fairly constant rate and excreted almost entirely by the kidneys. When kidneys work well, creatinine is cleared efficiently → low blood level. When kidneys fail → creatinine accumulates in blood. Normal creatinine ranges: Men: 0.7–1.2 mg/dL; Women: 0.5–1.0 mg/dL. However, creatinine alone is a poor indicator of kidney function — it is heavily influenced by muscle mass (a thin elderly woman with creatinine of 0.9 may have only 40% kidney function; a muscular young man with creatinine 1.3 may have perfectly normal kidneys). eGFR (estimated Glomerular Filtration Rate) is far superior — it uses creatinine, age, sex, and race to calculate an estimated kidney filtration rate. This is the number that actually stages CKD. Urine albumin:creatinine ratio (UACR) is equally important — measures protein leaking into urine. Normal: <30 mg/g; Microalbuminuria: 30–300 mg/g (early warning of diabetic and hypertensive kidney disease); Macroalbuminuria: >300 mg/g (significant damage). Both tests together — eGFR + UACR — are required to properly stage CKD.

Causes of CKD in India

Symptoms of CKD — Why It Is Called the “Silent Disease”

• 💤 Fatigue and weakness — from anaemia (low EPO → low RBCs) and uraemic toxin accumulation; often dismissed as “general weakness”
• 🦶 Ankle and leg swelling (oedema) — kidneys fail to excrete sodium and water → fluid accumulates in tissues; also facial puffiness, especially morning periorbital oedema
• 🌙 Nocturia — waking at night to urinate; early kidneys lose concentrating ability → produce dilute urine frequently
• 🫧 Frothy/foamy urine — proteinuria causes froth in toilet bowl; often the only early visible warning sign patients can notice
• 🩸 High blood pressure — both a cause and consequence of CKD; worsening BP control despite medication is a warning sign
• 🤢 Nausea, vomiting, poor appetite (late stage) — uraemia (urea accumulation) causes gastrointestinal symptoms; metallic taste in mouth
• 😮‍💨 Breathlessness — from fluid overload (pulmonary oedema) or severe anaemia
• 🧠 Confusion, poor concentration (advanced) — uraemic encephalopathy; requires urgent dialysis

How to Slow CKD Progression — Evidence-Based

Frequently Asked Questions

Can kidney disease be reversed?

Whether kidney disease can be reversed depends critically on the cause, stage, and duration. Acute Kidney Injury (AKI) — sudden kidney failure from dehydration, sepsis, contrast dye, or medications — is largely reversible if the cause is treated promptly and the kidneys are not further damaged. The kidneys have remarkable regenerative capacity over days to weeks. Early CKD (G1–G2) caused by a correctable cause (kidney stone obstruction, lupus nephritis responding to immunosuppression, poorly controlled diabetes/BP now well controlled) can stabilise or even modestly improve. Microalbuminuria in early diabetic nephropathy can return to normal with excellent HbA1c and ACE inhibitor therapy. Advanced CKD (G3b–G4) — structural scarring and nephron loss are permanent and not reversible. The goal becomes slowing progression to delay dialysis, not reversal. Some patients with G4 CKD maintain stable eGFR for years with optimal management without ever reaching dialysis. G5 (ESKD) — without a kidney transplant, this is permanent and life-incompatible without dialysis. A successful kidney transplant restores kidney function and can deliver near-normal eGFR — the closest thing to “reversal” for end-stage disease. The crucial message: the earlier CKD is detected and treated aggressively, the better the chance of significantly delaying or preventing dialysis dependency.

What is creatinine and what level needs dialysis?

Creatinine is a muscle waste product cleared by the kidneys. When kidneys fail, creatinine accumulates in blood. However, no specific creatinine number alone determines when dialysis is needed — this is one of the most common misconceptions in Indian nephrology. Many patients are told “your creatinine is 6 — you need dialysis immediately” without any other assessment. The decision to initiate dialysis is based on: Symptoms of uraemia — nausea and vomiting preventing adequate nutrition, confusion/encephalopathy, pericarditis (inflammation around the heart from uraemia — a medical emergency); eGFR — typically initiating dialysis consideration when eGFR drops below 10–15 ml/min in symptomatic patients; Dangerous electrolytes — hyperkalaemia (high potassium causing fatal cardiac arrhythmias) — potassium >6.5 meq/L unresponsive to medical treatment is an indication for urgent dialysis; Fluid overload — pulmonary oedema unresponsive to diuretics. A muscular man with creatinine of 8 mg/dL but no symptoms might be managed medically; a frail elderly woman with creatinine 4 mg/dL but severe uraemic encephalopathy may need urgent dialysis. The eGFR (not creatinine alone) plus clinical symptoms together determine timing. In India, many patients present for the first time in kidney failure at creatinine >10 because CKD was undetected — this emergency late presentation is associated with very poor outcomes.

What diet should a CKD patient follow?

CKD diet is nuanced and stage-dependent — and in India, standard “kidney diet” advice is often dangerously oversimplified. Protein: Restrict to 0.6–0.8g/kg/day in non-dialysis CKD (reduces hyperfiltration stress); BUT increase to 1.2–1.5g/kg in dialysis patients (dialysis itself removes protein — CKD dialysis patients are at severe risk of malnutrition). Potassium: Restrict only from G4 onwards and if blood potassium is elevated (>5.5 meq/L). Blanket potassium restriction in G2–G3 is unnecessary and can deprive patients of important nutrients. High-potassium foods in Indian diet: coconut water, banana, chikoo, potato, tomato — reduce in advanced CKD. Boiling and discarding cooking water reduces potassium in vegetables by 30–50%. Phosphate: Restrict from G3b — kidneys stop excreting phosphate → blood phosphate rises → depletes calcium from bones → renal osteodystrophy. High phosphate foods: dairy (paneer, cheese, milk), nuts, cola drinks. Phosphate binders (sevelamer, calcium carbonate) taken with food help. Salt (sodium): Restrict to <2g sodium/day (≈5g salt/day) in all CKD stages — sodium drives fluid retention, hypertension, and proteinuria. Most Indian packaged foods, pickles, and papads are very high sodium. Fluid restriction: Only in advanced CKD or dialysis patients who are oliguric/anuric. In early–moderate CKD, forcing excess fluids is not beneficial and may worsen some forms of CKD. A CKD-specific dietitian consultation is mandatory — not generic “kidney diet” internet advice.

Is kidney transplant available in India and how does it work?

Kidney transplantation is the best treatment for end-stage kidney disease — providing far better quality of life, survival, and cost-effectiveness compared to lifelong dialysis. India performs approximately 10,000–12,000 kidney transplants per year — the third-highest number globally — though this covers only about 2% of the 700,000 annual ESKD patients, representing a massive gap. Two sources of kidneys: Living donor transplant (most common in India — 80%): a genetically related donor (parent, sibling, child) or emotionally related donor (spouse) donates one kidney. Living donors can live completely normally with one healthy kidney. Matching: blood group + HLA crossmatch. Deceased donor / cadaveric transplant: kidney from a brain-dead donor; available through state transplant coordinators (NOTTO — National Organ and Tissue Transplant Organisation); waiting time 2–7 years in India. Post-transplant: lifelong immunosuppression (tacrolimus + mycophenolate + prednisolone) to prevent rejection; regular creatinine and donor-specific antibody monitoring; annual eGFR assessment. Transplant costs in India: ₹5–15 lakhs for surgery + ₹8,000–15,000/month ongoing immunosuppression. Some states (Tamil Nadu, Karnataka) have excellent government transplant programmes. Rajiv Gandhi Jeevandayee Arogya Yojana and Ayushman Bharat cover transplant in some states. Living-donor transplant from a well-matched young donor can last 15–25+ years — effectively giving the patient decades of dialysis-free life.

Are Ayurvedic or herbal remedies safe for kidney disease?

This is an extremely important question for Indian CKD patients — because Ayurvedic and herbal remedies are among the most common causes of additional kidney damage in Indian patients with pre-existing CKD. Several documented risks: Heavy metal contamination: CDSCO and multiple published Indian studies have found significant proportions of Ayurvedic patent formulations contain arsenic, lead, or mercury at toxic levels — all of which are directly nephrotoxic (kidney-damaging). Aristolochic acid nephropathy: Aristolochia species (found in some Ayurvedic preparations) cause rapid and irreversible kidney failure — a well-established nephrotoxin globally. Potassium overload: Many herbal preparations encourage coconut water, specific fruit juices, or supplements that can cause dangerous hyperkalaemia in advanced CKD patients. Herb-drug interactions: Herbal preparations can alter tacrolimus levels in transplant patients — with potentially fatal rejection consequences. False reassurance: Patients who feel their kidneys are being “treated naturally” may delay seeking nephrological care until reaching kidney failure. Evidence gap: No Ayurvedic treatment has been shown in rigorous randomised controlled trials to significantly slow CKD progression or improve eGFR. For CKD patients: do not take any Ayurvedic formulation, herbal supplement, or homeopathic preparation without explicit clearance from your nephrologist. All supplements must be disclosed to your treating doctor — “natural” does not mean safe for damaged kidneys.

What to Read Next

• Diabetes — #1 Cause of CKD in India
• High Blood Pressure — #2 Cause of CKD; ACE Inhibitors Protect Both
• Iron Deficiency Anemia — CKD Anaemia Is Different: Requires EPO + Iron Together
• Vitamin D — CKD Impairs Vitamin D Activation; Active D (Alfacalcidol) Needed
• Control Blood Sugar — The Single Most Preventable Cause of Kidney Failure

The kidneys work silently, filter without complaint, and give no warning until 70% of their capacity is gone. A creatinine test costs ₹80. A urine protein dip costs ₹30. Annual testing for every diabetic and hypertensive Indian could prevent hundreds of thousands of people reaching dialysis dependency — a test that costs less than a cup of coffee.

About This Guide: Written by the StudyHub Health Editorial Team (studyhub.net.in) based on KDIGO (Kidney Disease Improving Global Outcomes) CKD Guidelines 2024 and Indian Society of Nephrology data. Last updated: March 2026.

Authoritative Sources: KDIGO — CKD Guidelines 2024 | Indian Society of Nephrology | Mayo Clinic — CKD | ICMR India

⚕️ Medical Disclaimer: This article is for general informational and educational purposes only. CKD diagnosis and management requires nephrology evaluation and laboratory testing. Do not adjust medications, dietary restrictions, or dialysis decisions based on this article alone. Always consult a nephrologist for CKD management.