Alanine Aminotransferase (ALT/SGPT)
ALT is a liver enzyme that is released into the blood when liver cells are damaged. This test helps detect liver inflammation or injury from hepatitis, medications, or fatty liver disease.
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What the Alanine Aminotransferase (ALT/SGPT) test tells you
Alanine aminotransferase, still often written as SGPT, is an enzyme that lives inside liver cells and does its work there. Very little of it belongs in the bloodstream. When liver cells are inflamed, stressed or dying, their contents leak out, and ALT is one of the first things a blood test picks up. That is why it is included in almost every routine health screen — it is a sensitive early signal that something is irritating the liver, often long before you would feel anything.
ALT is the more liver-specific of the two classic transaminases, which is why doctors pay close attention when it rises on its own. The common explanations in adults are metabolic fatty liver disease linked to weight, blood sugar and lipids; alcohol; viral hepatitis; and medicines or supplements, a category that includes prescription drugs as well as herbal remedies and bodybuilding products. Less often, autoimmune liver disease, iron overload, coeliac disease or a thyroid disorder is behind it.
A single raised value is a starting point rather than a conclusion. The number can move with a hard gym session, a heavy weekend, a new medicine or a passing viral illness, so your doctor will usually repeat it before investigating further. What matters most is the pattern over time and the company it keeps: how ALT sits relative to AST, whether the bile duct enzymes are also up, and whether the liver's synthetic markers such as albumin remain intact. Persistent elevation is what prompts a fuller look for a cause.
Recommended as a routine liver health screen, when you take medications that may affect the liver, or when symptoms such as jaundice, fatigue, or abdominal pain suggest liver involvement.
Liver inflammation is usually painless in its early stages, and ALT can flag it while there is still time to reverse the cause.
Several common medicines can irritate the liver, and periodic ALT checks are the standard way to catch that before it becomes a problem.
In metabolic fatty liver disease, ALT is one of the simplest ways to see whether weight, diet and activity changes are having an effect.
When there is unexplained fatigue, right-sided abdominal discomfort, nausea or yellowing of the skin, ALT helps your doctor decide how urgently to look further.
Reasons your doctor may request the Alanine Aminotransferase (ALT/SGPT) test
Your doctor may order this test for any of the reasons below. Some are routine checks, others follow specific symptoms or an earlier result.
Routine liver screening
Routine health screening or an annual check-up that includes liver function.
Symptoms of liver strain
Fatigue, nausea, loss of appetite or discomfort under the right ribs.
Yellowing of the eyes or skin, or unusually dark urine.
Medication, known disease & family history
Starting or continuing a medicine known to affect the liver.
Known or suspected fatty liver disease, viral hepatitis, or regular alcohol use.
A family history of liver disease or of inherited iron overload.
No fasting window — pick any slot that suits you, online or on WhatsApp.
A DHA-licensed nurse collects your sample at home or in the office — free home collection.
A physician-reviewed, easy-to-read report lands securely by WhatsApp and email.
What a higher result can point to
- Metabolic fatty liver disease, now the most frequent reason for a mildly raised ALT.
- Viral hepatitis, either a new infection or a long-standing one flaring.
- Medicines and supplements, including some pain relievers, statins, antibiotics, herbal products and bodybuilding preparations.
- Alcohol, particularly a recent heavy episode or sustained regular drinking.
- Autoimmune hepatitis, inherited iron overload, or Wilson disease in younger patients.
- Coeliac disease or an underactive thyroid, both of which can raise transaminases without any liver-specific symptoms.
These are possibilities, not diagnoses. A single value outside the reference range is interpreted alongside your symptoms, history and other tests — your doctor decides what it means for you.
What this test cannot tell you
- ALT reflects that liver cells are leaking, not why, and gives no information about how much scarring is present.
- A normal ALT does not exclude liver disease — established cirrhosis frequently runs with unremarkable enzyme results.
- The value fluctuates with recent exercise, alcohol and intercurrent illness, so a single reading is rarely acted on alone.
- A low result carries no recognised clinical meaning and is not investigated.
Risks of the blood draw
- Mild bruising or brief soreness where the needle went in.
- Occasional lightheadedness, which settles after a few minutes of rest.
- Bleeding or infection at the site, which is rare with sterile single-use equipment.
- 1ALT sits mainly inside liver cells, so it is the more liver-specific of the two transaminases.
- 2It is a sensitive early marker and often rises before any symptom appears.
- 3Its value comes from repeated measurements and from how it compares with AST and the bile duct enzymes.
- 4A normal result does not rule out advanced liver disease.
- 5Supplements and over-the-counter products are a genuinely common cause and are worth mentioning to your doctor.
Frequently Asked Questions
Everything you need to know about the Alanine Aminotransferase (ALT/SGPT) test. Can't find what you're looking for?
Talk to our team→Usually not. ALT indicates that liver cells are currently irritated, and the liver has a strong capacity to recover once the cause is removed. Many elevations settle after stopping a medicine, cutting alcohol, or improving weight and blood sugar.
The two enzymes have different distributions in the body, so their relationship carries information that neither gives alone. Your doctor reads the balance between them, together with the bile duct enzymes, to decide which part of the liver picture to pursue.
Yes. Intense resistance training can raise transaminases for several days, and a number of bodybuilding and herbal supplements are recognised causes of liver enzyme elevation. Mention both, since they are easily mistaken for liver disease.
No. Enzyme levels can be entirely unremarkable in advanced fibrosis and cirrhosis, because there are fewer functioning cells left to leak. Your doctor may use imaging, fibrosis assessment or other blood markers rather than relying on ALT alone.
ALT is a liver enzyme that is released into the blood when liver cells are damaged. This test helps detect liver inflammation or injury from hepatitis, medications, or fatty liver disease.
Recommended as a routine liver health screen, when you take medications that may affect the liver, or when symptoms such as jaundice, fatigue, or abdominal pain suggest liver involvement.
No, fasting is not required for the Liver Enzyme (ALT / SGPT) test, so you can eat and drink normally beforehand.
The Liver Enzyme (ALT / SGPT) test uses a blood sample, collected quickly by our DHA-licensed phlebotomist with minimal discomfort.
Results for the Liver Enzyme (ALT / SGPT) test are typically ready within 12 hours. You will receive a secure digital report, and your Smart Report highlights anything outside the normal range.
The Liver Enzyme (ALT / SGPT) test is AED 120, which includes free home sample collection and a physician-reviewed report. You can also build a custom panel and pay only for the markers you choose.
Yes. A DHA-licensed phlebotomist can collect your sample at home or the office anywhere in Dubai at no extra cost, 7 days a week. See how it works.
It is commonly chosen by adults & teens. If you are not sure it is right for you, our care team is happy to advise.
Add the Liver Enzyme (ALT / SGPT) test to your cart and complete the short booking wizard, choosing home collection or a lab visit. Guest checkout lets you book without creating an account.
Yes. It is processed at our EIAC-accredited laboratory (ISO 15189:2022) under DHA license 0046381 and verified by board-certified pathologists.
Every report includes reference ranges and plain-language notes. If you have questions, our care team can arrange a clinician review — just get in touch.
Absolutely. Add it to a curated health package or bundle it with any of our 160+ biomarkers, often from a single sample in one visit.