How to Read Blood Test Results in India: A Complete Guide

Every year, millions of Indians get blood tests done — from routine check-ups to diagnostic workups. Yet most of us glance at the report, see a wall of numbers, and hand it straight to the doctor.

Here's the problem: understanding your own health data helps you catch issues early, ask better questions, and take ownership of your wellness. You don't need a medical degree — you just need to know what the key markers mean and when to be concerned.

This guide walks you through the most common blood tests ordered in Indian labs, what each value means, and how to spot abnormal results.

Most Indian pathology labs — whether it's Thyrocare, Dr. Lal PathLabs, SRL Diagnostics, Apollo, Metropolis, or your local diagnostic centre — follow a similar format:

Header: Patient name, age, gender, sample collection date, report date, referring doctor, and lab details.

• •Test name (e.g., Hemoglobin, Total Cholesterol)
• •Your value (the measured result)
• •Unit (e.g., g/dL, mg/dL, mIU/L)
• •Reference range (the "normal" range for your age and gender)
• •Flag (H for High, L for Low, or blank if normal)

The reference range is crucial — a value of 200 means nothing without knowing if normal is 0–100 or 150–400.

The CBC is the single most commonly ordered blood test in India. It measures the cells in your blood and is usually the first test your doctor orders.

Key markers to watch:

Hemoglobin (Hb): Normal: Men 13–17 g/dL, Women 12–16 g/dL. Low hemoglobin (anaemia) is extremely common in India, especially in women. If your Hb is below 12 g/dL (women) or 13 g/dL (men), your body isn't carrying enough oxygen. Symptoms include fatigue, pale skin, and breathlessness.

White Blood Cell (WBC) Count: Normal: 4,000–11,000 /µL. WBCs fight infection. A high count may indicate infection, inflammation, or rarely, blood disorders. A low count can signal viral infections or immune issues.

Platelet Count: Normal: 1.5–4.0 lakh /µL. Platelets help your blood clot. Low platelets (thrombocytopenia) are a classic sign of dengue — a critical marker during monsoon season in India.

RBC Count, PCV/Hematocrit, MCV, MCH, MCHC: These tell your doctor about the size and quality of your red blood cells. For example, a low MCV with low hemoglobin typically suggests iron deficiency anaemia, while a high MCV might point to vitamin B12 or folate deficiency.

With cardiovascular disease being the leading cause of death in India, the lipid profile is arguably the most important preventive test.

Total Cholesterol: Desirable: Below 200 mg/dL. Borderline: 200–239. High: 240+.

LDL Cholesterol (the "bad" one): Optimal: Below 100 mg/dL. Near optimal: 100–129. High: 160+. LDL deposits fat in your artery walls. This is the number your cardiologist watches most closely.

HDL Cholesterol (the "good" one): Men: Above 40 mg/dL. Women: Above 50 mg/dL. Higher is better. HDL removes cholesterol from your arteries. Exercise and healthy fats raise HDL.

Triglycerides: Normal: Below 150 mg/dL. High: 200+. Elevated triglycerides are often linked to diabetes, obesity, and high-carb diets — very common in Indian diets rich in rice and refined flour.

Important: Lipid tests require 10–12 hours of fasting. If you ate before the test, triglycerides especially will be artificially high.

India is the diabetes capital of the world, with over 100 million diabetics. Three key tests:

Fasting Blood Sugar (FBS): Normal: 70–100 mg/dL. Pre-diabetic: 100–125. Diabetic: 126+. This measures sugar after 8–12 hours of fasting.

Post-Prandial Blood Sugar (PPBS): Normal: Below 140 mg/dL (2 hours after eating). Diabetic: 200+.

HbA1c (Glycated Hemoglobin): Normal: Below 5.7%. Pre-diabetic: 5.7–6.4%. Diabetic: 6.5%+. This is the gold standard — it shows your average blood sugar over the past 2–3 months, so one cheat meal won't skew it. If your doctor orders only one sugar test, this should be it.

Thyroid disorders affect an estimated 42 million Indians, with women being 5–8 times more likely to be affected.

TSH (Thyroid Stimulating Hormone): Normal: 0.4–4.0 mIU/L (some labs use 0.5–5.0). This is the screening test. High TSH = hypothyroidism (underactive thyroid — weight gain, fatigue, hair loss). Low TSH = hyperthyroidism (overactive — weight loss, anxiety, tremors).

Free T4 (Thyroxine): Normal: 0.8–1.8 ng/dL. If TSH is abnormal, T4 tells you the severity. Low T4 with high TSH confirms hypothyroidism.

Free T3 (Triiodothyronine): Normal: 2.3–4.2 pg/mL. Less commonly abnormal but important in hyperthyroidism.

Tip: If you're on thyroid medication (Thyrox, Eltroxin), get tested first thing in the morning BEFORE taking your tablet, and tell your lab.

Your liver is a chemical factory. LFTs check if it's working properly.

SGOT (AST) and SGPT (ALT): Normal: Below 40 U/L. These enzymes leak into the blood when liver cells are damaged. Elevated levels are common with fatty liver disease (very prevalent in urban India), alcohol use, or medications like paracetamol.

SGPT is more specific to the liver than SGOT. If only SGPT is elevated, it's more likely a liver issue. If both are elevated, it could also be muscle damage or heart issues.

Bilirubin: Normal: 0.1–1.2 mg/dL. High bilirubin causes jaundice (yellowing of skin and eyes).

Alkaline Phosphatase (ALP): Normal: 44–147 U/L. Elevated in liver or bone conditions.

Creatinine: Normal: Men 0.7–1.3 mg/dL, Women 0.6–1.1 mg/dL. This is the primary kidney health marker. Rising creatinine means your kidneys are struggling to filter waste. Even slightly elevated creatinine warrants attention.

Blood Urea Nitrogen (BUN) / Urea: Normal: BUN 7–20 mg/dL, Urea 15–40 mg/dL. Elevated with dehydration, high-protein diets, or kidney disease.

Uric Acid: Normal: Men 3.4–7.0 mg/dL, Women 2.4–6.0 mg/dL. High uric acid causes gout (joint pain) and kidney stones — common in India, especially with non-vegetarian diets and inadequate water intake.

Vitamin D (25-Hydroxy): Normal: 30–100 ng/mL. Deficient: Below 20. Insufficient: 20–29. Despite being a tropical country, vitamin D deficiency affects 70–90% of Indians due to indoor lifestyles, pollution, and darker skin. If you're always tired or have bone pain, get this checked.

Vitamin B12: Normal: 200–900 pg/mL. Deficiency is extremely common in vegetarians — B12 is found almost exclusively in animal products. Low B12 causes fatigue, numbness, memory issues, and can mimic many other conditions.

Iron Studies (Serum Iron, Ferritin, TIBC): Ferritin normal: Men 20–500 ng/mL, Women 20–200 ng/mL. Low ferritin is the earliest sign of iron deficiency, even before hemoglobin drops. Very common in Indian women.

Calcium: Normal: 8.5–10.5 mg/dL. Low calcium with low vitamin D is a classic combination in India.

Most labs flag abnormal values with H (High) or L (Low), but here are practical tips:

1. 1.Look at the reference range, not just the flag. A value of 4.1 with a range of 0.4–4.0 is barely elevated — very different from 15.0 with the same range.

1. 1.Context matters. A single abnormal value doesn't mean disease. Mild elevations can be caused by dehydration, recent exercise, medications, or even the time of day.

1. 1.Track trends over time. One cholesterol reading of 210 isn't alarming. But if it was 180 → 195 → 210 over three years, that's a clear upward trend worth acting on.

1. 1.Compare across reports. Don't just look at one report in isolation. Your health story emerges from tracking values across multiple tests over months and years.

1. 1.Don't panic, but don't ignore. Significantly abnormal values (2–3x the upper limit) need medical attention. Mildly abnormal values need a follow-up test to confirm.

Reading lab reports is one thing. Tracking dozens of values across multiple family members over years is another challenge entirely.

That's exactly why we built Arogya Story. Upload any lab report PDF from any Indian lab — our AI reads every test name, value, unit, and reference range, flags abnormal results, and tracks your trends over time. You can ask questions like "Has my cholesterol been improving?" and get answers backed by your actual data.

No signup required to try it — just upload a report and see it in action.