Sapiens · Liver & Metabolic
LFT Test: Normal Ranges and How to Read Your Liver Report
A liver function test (LFT) is a panel of blood measurements, usually seven or eight of them: SGPT, SGOT, ALP, GGT, bilirubin, albumin and total protein. Together they show whether your liver cells are under stress, whether bile is flowing freely, and whether the organ is still building the proteins your blood depends on. At major Indian labs the panel costs about ₹300–₹800, and on its own it rarely needs fasting.
The value that most often sends someone searching is a mildly raised SGPT, and in India one of its commonest explanations is fat in the liver, particularly when a bigger waist, diabetes, insulin resistance or abnormal lipids sit alongside it. Roughly one in three Indian adults now has fatty liver, most with no symptoms at all.2 So a small red “H” beside your SGPT is common, usually quiet, and often improvable. It is rarely an emergency. The catch runs the other way too, because a report with every value in range does not prove your liver is clear. Both halves of that sentence need unpacking, and that is what this guide does.
Quick facts
- An LFT measures liver enzymes (SGPT/ALT, SGOT/AST, ALP, GGT), bilirubin, and proteins the liver makes (albumin, total protein).
- Commonly printed adult ranges are about 7–40 U/L for SGPT and 8–40 U/L for SGOT; every lab sets its own, so read your report against its printed range.
- In Indian adults, fatty liver is one of the commonest explanations for a mildly raised SGPT, particularly with metabolic risk; values several times the upper limit need prompt medical review.
- Doctors read a raised enzyme as a multiple of the lab’s upper limit, and the SGOT-to-SGPT pattern hints at the cause.
- Normal enzymes do not rule out fatty liver: in one Indian study, over half of walk-in blood donors had it on ultrasound.
What is a liver function test?Copy link
Despite the name, an LFT mostly does not measure function. Its enzymes (SGPT, SGOT, ALP, GGT) are alarm wires that signal injury or blocked bile flow. Bilirubin partly reflects the liver’s ability to process and excrete waste. The closest things to true function readings are albumin, a protein the liver manufactures, and a clotting time (PT/INR) that routine Indian panels usually leave out. That distinction sounds academic until you read a report with it, because it explains how one high enzyme can coexist with a liver that works perfectly well, and how serious chronic disease can sit behind quiet numbers.
You will meet this test in the annual package from your office, before starting long-term medicines such as statins or TB treatment, when symptoms point at the liver (yellowed eyes, dark urine, a dull ache under the right ribs), and as the tracking tool for a condition already found. It is a standard component of every full body checkup in India.
| Marker | Also called | What it reflects |
|---|---|---|
| SGPT | ALT (alanine aminotransferase) | Liver-cell stress or damage; the most liver-specific value |
| SGOT | AST (aspartate aminotransferase) | Liver-cell damage; also present in muscle and heart |
| ALP | Alkaline phosphatase | Bile ducts and liver; also made by bone |
| GGT | Gamma-glutamyl transferase | Bile ducts; sensitive to alcohol and several medicines |
| Bilirubin | Total, direct, indirect | The waste pigment behind jaundice; tests the liver’s clearance |
| Albumin | — | A protein the liver manufactures; true synthetic function |
| Total protein | With A/G ratio | Albumin plus globulins; the wider protein picture |
What is the normal range for an LFT?Copy link
The ranges below are the ones commonly printed on Indian adult reports. Treat them as a map, never as your lab’s exact borders: methods differ between laboratories, and your report’s own printed range is the one your values were measured against.
| Value | Typical range | Reading note |
|---|---|---|
| SGPT (ALT) | ~7–40 U/L | Some labs print up to 49–56 U/L for men, ~45 for women |
| SGOT (AST) | ~8–40 U/L | A hard workout can raise it for days |
| ALP | ~40–129 U/L | Higher in teenagers and pregnancy; bone makes it too |
| GGT | varies most by lab | Often up to ~55 U/L; read against your report |
| Bilirubin, total | ~0.1–1.2 mg/dL | Direct (conjugated) fraction usually under ~0.3 mg/dL |
| Albumin | ~3.5–5.0 g/dL | Falls slowly in chronic disease, and for non-liver reasons too |
| Total protein | ~6.0–8.3 g/dL | Read with the albumin/globulin (A/G) ratio |
A value one point past the line is a shrug, not a verdict. What deserves attention is a value several times the limit, a trend climbing across reports, or an abnormal number travelling with symptoms.
Why “normal” on the report is a lower bar than you’d thinkCopy link
The range table skips a question: normal compared with whom? Reference ranges are built from the population a lab samples, and in India that population itself carries a great deal of liver fat. When researchers at a Chandigarh institute screened 986 male blood donors, ordinary walk-in volunteers, 55% had fatty liver on ultrasound.3 After the genuinely healthy remainder was isolated (no liver fat, no metabolic syndrome, normal weight and lipids), their median SGPT was about 21 U/L and the 95th percentile sat near 37. One centre, men only, donors only, so hold the exact figures loosely. The direction is the point.
Guideline writers landed in the same place. The American College of Gastroenterology puts a genuinely healthy SGPT at 29–33 U/L for men and 19–25 U/L for women, well below the 40–56 ceilings many labs still print.1 So an SGPT of 38 can read “normal” on paper and still deserve a second look, particularly if your waistband has moved over the same years and other metabolic numbers are drifting with it. A single value like that diagnoses nothing on its own. It is a reason to watch the trend and the metabolic picture, and no reason to panic at 30.
What does a high SGPT or SGOT mean?Copy link
Both enzymes live inside liver cells. When those cells are stressed or dying, the enzymes leak into blood, so a raised level says something is irritating the liver. It does not say what. The causes, roughly in the order they turn up in Indian clinics:
| Cause | What points to it |
|---|---|
| Fatty liver (MASLD/NAFLD) | One of the commonest causes in Indian adults; pooled prevalence ~38.6% of adults, though community-only estimates run lower2; tracks with waist, insulin resistance and diabetes, and occurs at normal weight too |
| Alcohol | SGOT above SGPT, often with a raised GGT; frequently sits alongside fatty liver |
| Medicines | Statins, anti-TB drugs, some antibiotics and anti-epileptics, paracetamol in excess |
| Herbal & Ayurvedic products | A recognised Indian cause; see below |
| Viral hepatitis B and C | Always excluded when an elevation persists |
| Rarer causes | Autoimmune hepatitis, Wilson’s disease and others, sought when nothing above fits1 |
Naturally, more than one of these can be true at once; alcohol on top of a fatty liver is a common Indian combination, and each makes the other worse.
The causes your report can’t see: herbal supplements and TB treatment
What do you swallow in a week that never went past a doctor? A churna for digestion, a tonic for immunity, a powder recommended across the counter. Unlabelled polyherbal products are a recognised cause of serious liver injury in India. In one Kerala series of severe injury linked to Ayurvedic and herbal medicines, most implicated products were unlabelled mixtures, chemical analysis found arsenic and mercury, and roughly one patient in five died.7 A single-centre series of the sickest cases, so it measures severity among those affected, never how often injury occurs. It still explains why your doctor needs the full list, supplements included, whenever your SGPT is up.
TB treatment gets its own line because India carries the world’s largest TB burden and the first-line drugs (isoniazid, rifampicin, pyrazinamide) can each stress the liver, which is why enzymes are monitored during treatment. If you are on TB medication and your LFT rises, that is a call-your-doctor-today situation, never a stop-your-tablets-yourself one. An interrupted TB course carries risks of its own.
Is an SGPT of 60 dangerous? Reading 45, 60, 100 and beyondCopy link
The short answer for the commonest case: if your lab’s upper limit is 40, an SGPT of 45–60 sits below twice that limit, which the American College of Gastroenterology classes as a borderline elevation.1 In an Indian adult, fatty liver is among the commonest explanations for a borderline rise, particularly when a bigger waist, insulin resistance, diabetes or abnormal lipids sit alongside it; alcohol, medicines and recent illness account for much of the rest. What a doctor actually reads is the multiple of the upper limit rather than the raw figure, because every lab’s limit differs. The full ACG ladder: below 2 times the limit is borderline; 2–5 times is mild; 5–15 times is moderate; above 15 times is severe, with values past 10,000 U/L termed massive. Borderline and mild rises get evaluated over weeks to months; moderate and above get evaluated immediately.1 The bands set the pace of the workup; they do not name the disease.
Two mundane things produce scary one-offs. A hard gym session, heavy weights especially, pushes SGOT up for days because that enzyme also lives in muscle. A recent viral illness can bump both. If a temporary explanation like that fits your last few weeks, repeating the panel once it has passed shows whether anything real remains, and many rechecks come back normal. What persists needs a cause sought; rechecking on repeat without ever asking why is the one habit the guidelines specifically warn against.6
What does the SGOT-to-SGPT ratio tell a doctor?Copy link
Two numbers, read against each other, hint at a cause in a way neither does alone. In fatty liver, SGPT usually runs equal to or higher than SGOT. In alcohol-related damage the pattern flips: SGOT typically higher, often more than double, particularly with a raised GGT alongside.1 And in someone with known chronic liver disease, a ratio climbing over time can accompany progressing scarring. Treat all of this as a pointer for the conversation with your doctor. The ratio suggests; it never diagnoses.
What do ALP, GGT and bilirubin mean on your LFT?Copy link
The panel has a second axis: liver cells versus plumbing. When SGPT and SGOT dominate the picture, the trouble sits in the cells. When ALP rises out of proportion, with GGT rising alongside to confirm, the trouble usually involves the bile ducts: gallstones, a blockage, certain medicines.1 ALP alone is less specific because bone makes it too, so a raised ALP in a growing teenager, in pregnancy or after a fracture may mean nothing hepatic at all.
A high GGT by itself is common and vague. It is sensitive to alcohol and to several medicines, so a lone GGT elevation usually earns a question about drinking and a recheck before anything else.
Bilirubin is the yellow pigment left over when old red blood cells are broken down; clearing it is your liver’s job. When clearance fails or a duct is blocked, it backs up in blood and, high enough, shows as jaundice in the whites of the eyes. Your report splits it in two. A raised direct (conjugated) fraction points at the liver or the ducts.1 A mildly raised indirect fraction in an otherwise normal report is very often Gilbert’s syndrome, a harmless inherited quirk that becomes more visible when you fast or fall ill. Visible jaundice, dark urine or pale stools: see a doctor promptly, whatever the rest of the report says.
Which values measure actual liver function?Copy link
Albumin, mainly, with help from outside the routine panel. Albumin is a protein your liver manufactures continuously; it holds fluid inside your blood vessels and ferries hormones and medicines around the body. A genuinely failing liver lets it drift down over weeks to months, though poor nutrition, chronic inflammation and kidneys that leak protein can lower it too, which is one reason an LFT is often read next to the kidney panel (KFT/RFT). Total protein is a blunter tool: it lumps albumin together with globulins, many of them immune proteins made outside the liver, which is exactly what the A/G ratio on your report is there to untangle. And the sharpest synthetic-function measure, a clotting time (prothrombin time/INR), sits outside the routine Indian LFT panel altogether; doctors add it when real liver disease is suspected, because clotting factors are liver-made and turn over in hours.
Can your LFT be normal while your liver is in trouble?Copy link
Yes, and this is the single most useful fact on this page. Liver enzymes report the current leak from liver cells; they do not report accumulated fat or accumulated scar. Plenty of people with real fatty liver, including the lean fatty liver common in slim Indians, keep SGPT and SGOT comfortably in range. At the far end, a long-scarred liver can print unremarkable enzymes precisely because fewer working cells remain to leak.
So when can you trust an all-clear? When it agrees with the rest of your picture. If you carry metabolic risk (a bigger waist, prediabetes or diabetes, a strong family history), a clean LFT should not close the question. The two follow-ups that actually look are an ultrasound, which can show the fat (though it misses milder degrees of it), and a simple score called FIB-4, which your doctor can compute from your age, SGOT, SGPT and the platelet count from a CBC. Between roughly 35 and 65, a FIB-4 below 1.3 is reassuring against advanced scarring; above 2.67 it is a signal to see a liver specialist; the middle band goes on to a FibroScan, which measures liver stiffness directly.5 Above 65 the rule-out bar shifts up, so below 2.0 counts as lower risk there instead of below 1.3. And the score is less accurate under about 35, where a low number should not close the question if the metabolic risk is real. Your HbA1c and lipids fill in the rest, because fatty liver rarely travels alone.
How do you bring a high SGPT down?Copy link
When the cause is fatty liver, which in India it usually is, the enzymes fall as the liver fat goes. The dose-response is unusually well measured. A year-long trial biopsied 293 people with fatty-liver inflammation before and after lifestyle change: at 5% of body weight lost, clear improvement showed on the repeat biopsies, and among those who lost 10% or more, 90% had the inflammation resolve and 45% saw scarring regress.4 The current European fatty-liver guideline sets its targets in the same tiers: about 5% of body weight to reduce liver fat, 7–10% to improve inflammation, and 10% or more to aim at scarring.8 Now the uncomfortable half of the same trial: fewer than one in ten managed a 10% loss in a year through lifestyle change alone. The target works. Reaching it is the hard part.
In practice, start where the liver is loaded most directly. Cut liquid and refined sugar first: sweetened chai, soft drinks, juices, maida. Fructose is processed almost entirely by the liver. Bring alcohol down or out, which also drops GGT. Move most days, because exercise trims liver fat even before the weighing scale shifts much. And take every tablet, syrup and supplement you use to your doctor for one honest review. Then retest after two to three months. A falling SGPT is one of the cheapest progress markers in medicine.
If lifestyle alone has not moved things and you are carrying obesity, diabetes or insulin resistance, doctor-supervised weight-loss treatment is a genuine option now; GLP-1 medicines reduce liver fat alongside weight, and enzymes commonly improve on them. They bring trade-offs and side effects of their own, so read what to expect from semaglutide before you and your doctor decide anything.
Do you need to fast for an LFT, and what does it cost?Copy link
On its own, no: most labs run an LFT without fasting. Some ask for 8–10 hours to standardise results, and if your LFT is drawn together with tests that do need preparation, a fasting glucose or a lipid profile, follow the lab’s instruction for the whole draw.
As of August 2026, a standalone LFT at major national chains runs about ₹300–₹800, varying with the city, the lab and home collection; inside a full-body package the effective per-test cost falls. Prices move, so check before you book.
When should you see a doctor about an LFT result?Copy link
Promptly, within days: enzymes several times above the upper limit, a raised bilirubin, or any abnormal value alongside yellowed eyes, dark urine, pale stools, persistent pain under the right ribs, swelling of the abdomen or legs, or unexplained weight loss.6 Without drama, soon: a mildly raised SGPT with none of those, which merits a recheck in a few weeks and, if it persists, a proper conversation about fatty liver, alcohol, medicines and your metabolic health. Bring the older reports too, if you have them. The trend across two or three years tells a doctor more than any single sheet.
Frequently asked questionsCopy link
What is an LFT test?
An LFT (liver function test) is a blood panel measuring liver enzymes (SGPT/ALT, SGOT/AST, ALP, GGT), bilirubin, and proteins such as albumin. Together they show whether liver cells are stressed, whether bile is flowing, and whether the liver is producing normally. In India it costs roughly ₹300–₹800 and usually needs no fasting on its own.
What is SGPT, and what is its normal range?
SGPT (also called ALT) is an enzyme inside liver cells that leaks into blood when those cells are stressed. Labs commonly print a range of about 7–40 U/L. Research on genuinely healthy adults puts the ceiling lower, around 29–33 U/L for men and 19–25 U/L for women, so read your value against your lab’s range and your own trend.
Is an SGPT of 60 dangerous?
Usually not by itself. If your lab’s upper limit is 40, then 60 sits under twice the limit, which guidelines class as a borderline elevation. In Indian adults, fatty liver is among the commonest explanations, particularly with metabolic risk, alongside alcohol, medicines and recent illness. Recheck it after a few weeks. Urgency rises with the multiple of your lab’s upper limit, with symptoms, and with bilirubin changes, never simply because the raw number crosses 100.
Can liver enzymes be normal with fatty liver?
Yes, commonly. Enzymes measure the current leak from liver cells, not stored fat, and many people with fatty liver, including slim people with lean fatty liver, have normal SGPT and SGOT. If you carry metabolic risk, an ultrasound or a FIB-4 score answers what the enzymes cannot.
How can I reduce a high SGPT?
When fatty liver is the cause, the targets run in tiers: around 5% weight loss reduces liver fat, 7–10% improves inflammation, and 10% or more gives the best chance of improving scarring. Cut sugar and refined carbohydrates, reduce or stop alcohol, and review all medicines and supplements with a doctor. Enzymes typically fall as liver fat clears; retest after two to three months to confirm the direction.
Does an LFT need fasting?
Not on its own at most labs, though some request 8–10 hours. If the LFT is bundled with a lipid profile or fasting glucose, fast for the whole draw and follow your lab’s instruction.
How much does an LFT cost in India?
About ₹300–₹800 standalone as of August 2026, depending on the city, the lab and home collection. Inside a full-body package the effective cost per test is lower.
What does high bilirubin mean?
Bilirubin is the pigment behind jaundice. A raised direct (conjugated) fraction points at liver or bile-duct trouble and deserves prompt review, especially with yellowed eyes or dark urine. A mildly raised indirect fraction alone is often Gilbert’s syndrome, a harmless inherited trait.
ReferencesCopy link
- Kwo PY, Cohen SM, Lim JK. ACG Clinical Guideline: Evaluation of Abnormal Liver Chemistries. American Journal of Gastroenterology. 2017;112(1):18–35 — defines a true healthy ALT of 29–33 IU/L in men and 19–25 IU/L in women from prospectively studied populations without liver-disease risk factors; sets the multiples-of-upper-limit framework used in Fig. 2; defines hepatocellular versus cholestatic patterns, notes that an elevated conjugated bilirubin implies hepatocellular disease or cholestasis, and that AST above ALT with heavy alcohol use suggests alcohol-related disease. PMID 27995906
- Shalimar, Elhence A, Bansal B, Gupta H, Anand A, Singh TP, Goel A. Prevalence of Non-alcoholic Fatty Liver Disease in India: A Systematic Review and Meta-analysis. Journal of Clinical and Experimental Hepatology. 2022;12(3):818–829 — pooled adult prevalence 38.6% (95% CI 32–45.5) across 54 adult datasets and 23,581 participants; community-based estimates (28.2%) ran lower than hospital-based ones (40.8%), so the headline figure likely overstates the community rate; the authors’ own summary is roughly one in three. High between-study heterogeneity. PMID 35677499
- Najmy S, Duseja A, Pal A, Sachdev S, Sharma RR, Marwah N, Chawla Y. Redefining the Normal Values of Serum Aminotransferases in Healthy Indian Males. Journal of Clinical and Experimental Hepatology. 2019;9(2):191–199 — 1,002 consecutive blood donors at a Chandigarh institute; of the 986 men analysed, 55.1% had fatty liver on ultrasound; in the truly healthy subgroup (no fatty liver, no metabolic syndrome, normal BMI and lipids) median ALT was 21.4 U/L with a 95th percentile of 36.6 U/L. Single centre, men only, a donor rather than community population, so the cut-offs are indicative. PMID 31024201
- Vilar-Gomez E, Martinez-Perez Y, Calzadilla-Bertot L, et al. Weight Loss Through Lifestyle Modification Significantly Reduces Features of Nonalcoholic Steatohepatitis. Gastroenterology. 2015;149(2):367–378 — 293 patients with biopsy-proven NASH followed for 52 weeks with paired biopsies; among those losing ≥10% of body weight, 90% had resolution of steatohepatitis and 45% regression of fibrosis; only 30% of participants achieved ≥5% loss and fewer than 10% achieved ≥10%. Single-centre Cuban cohort. PMID 25865049
- Kanwal F, et al. Clinical Care Pathway for the Risk Stratification and Management of Patients With Nonalcoholic Fatty Liver Disease. Gastroenterology. 2021;161(5):1657–1669 — FIB-4 below 1.3 excludes advanced fibrosis with a negative predictive value of ≥90% (a higher cut-off of 2.0 applies over age 65); above 2.67 flags high risk with positive predictive values of 60–80%; roughly a third of tested patients land in the indeterminate band and go on to elastography. PMC8819923
- Newsome PN, Cramb R, Davison SM, et al. Guidelines on the management of abnormal liver blood tests. Gut. 2018;67(1):6–19 — the British Society of Gastroenterology pathway behind this page’s pattern-based reading and recheck advice; it stresses that persistent abnormal results need a cause sought rather than serial re-checking alone, and gives urgent-referral criteria for marked derangement or synthetic failure. PMID 29122851
- Philips CA, Paramaguru R, Joy AK, Antony KL, Augustine P. Clinical outcomes, histopathological patterns, and chemical analysis of Ayurveda and herbal medicine associated with severe liver injury — a single-center experience from southern India. Indian Journal of Gastroenterology. 2018;37(1):9–17 — severe liver injury linked to Ayurvedic and herbal medicines; most implicated products were unlabelled polyherbal mixtures, chemical analysis found arsenic and mercury, and overall mortality was about 19%. A single-centre series of the sickest cases: it measures severity among those affected, never how often injury occurs. PMID 29476406
- European Association for the Study of the Liver (EASL), European Association for the Study of Diabetes (EASD), European Association for the Study of Obesity (EASO). EASL–EASD–EASO Clinical Practice Guidelines on the management of metabolic dysfunction-associated steatotic liver disease (MASLD). Journal of Hepatology. 2024;81(1):1–51 — the current European standard for fatty liver, carrying forward tiered weight-loss targets (about 5% of body weight for liver fat, 7–10% for inflammation, ≥10% aimed at scarring), the stepwise FIB-4-then-elastography pathway this page follows, and support for incretin-based therapy where type 2 diabetes or obesity coexists. PMID 38851997
Medical disclaimer. This article is for general information and is not a substitute for individual medical advice. Reference ranges vary by laboratory and population; interpret your report against its printed ranges and with a doctor. Do not start or stop any prescribed medicine, including TB treatment, on the basis of a blood result alone. Written by Dr. B. Akash Reddy, MBBS.