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HDL42
Triglycerides180
ApoB110
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Aspartate Aminotransferase (AST)mg/dL
Alanine Aminotransferase (ALT)mg/dL
Alkaline Phosphatase (ALP)mg/dL
339 U/L very high
0 from your result
mildly elevatedelevatedvery high
1normal under 46500
what this means

339 is very high for GGT, enough that the number itself is the problem.

this is the average reading · make it yours below

reading as

This level is usually treated as urgent. A result this far outside the range is normally checked by a doctor promptly, not at your next routine appointment.

You are 293 U/L over the normal ceiling of 46. That reads very high.

339 is very high. That is above the normal range for GGT. How much it matters depends on the markers it travels with, which is what the sections below are rewritten against.

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Your BloodMarker report · Gamma-Glutamyl Transferase (GGT)

Gamma-Glutamyl Transferase (GGT) 339 U/L: Is That High?

Yes. 339 U/L is well outside the normal range for GGT.

But a number alone is only half the story. Your Aspartate Aminotransferase (AST), Alanine Aminotransferase (ALT) and your risk factors decide how much it means. Tell it who you are.

Reviewed against ALF, NIH, Mayo Clinic, AGA guidelines · Last reviewed March 30, 2026

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YOUR NUMBERS

Normal: <48
Raised: 48-119
High: 120+

Values in U/L. Your Gamma-Glutamyl Transferase (GGT) of 339 is marked.

What they say together.

Gamma-Glutamyl Transferase (GGT) is read as part of a set. Add the ones printed next to it on your test and the figures below work themselves out, with the ranges this page uses for each.

U/LHIGH
U/LexampleNORMAL
U/LexampleNORMAL
34 ÷ 38 =0.9AST to ALT ratio, the De Ritis ratio. Under 1 is the usual fatty-liver pattern; above 2 points at alcohol.
339 and 388.9GGT against ALT. GGT rising faster than ALT is the pattern that separates alcohol and bile flow from fat in the liver.
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Every marker on your test, read against your age and sex. Free.

Is Gamma-Glutamyl Transferase (GGT) 339 U/L Low, Normal, or High?

Gamma-Glutamyl Transferase (GGT) 339 U/L might be considered substantially elevated. When GGT levels reach this point, it often indicates a more pronounced signal from the body's systems, particularly those involving the liver.

This value is a significant departure from typical measurements. It serves as an invitation to understand the various factors that could contribute to such a reading, often pointing towards common influences. What might this notable elevation be trying to communicate about your health?

what this page cannot tell you

Hemoglobin levels combined with this marker can reveal underlying conditions that neither value shows on its own

This page has not been given your Hemoglobin, so that half of the picture is missing here. It is describing the average reader with Gamma-Glutamyl Transferase (GGT), not you.

Read mine against my Hemoglobin →

A Gamma-Glutamyl Transferase (GGT) level of 339 U/L is considered significantly elevated, soaring more than six times above the normal upper limit of 45 U/L. This very high reading signals a substantial concern, almost always indicating significant liver stress or damage that warrants immediate clinical attention.

At this extreme elevation, common culprits often involve acute or severe liver inflammation (hepatitis) from various causes, such as viral infections, certain medications, or notably, substantial alcohol consumption. Another strong possibility is a blockage in the bile ducts, perhaps due to gallstones, tumors, or strictures, which impedes bile flow and can lead to cholestasis.

To pinpoint the precise issue, your healthcare provider will almost certainly order further diagnostic tests. These typically include a comprehensive liver panel (checking enzymes like ALT, AST, and ALP, along with bilirubin levels), and often imaging studies such as an abdominal ultrasound or MRI to visualize the liver and bile ducts for structural abnormalities or obstructions.

Depending on findings, blood tests for viral hepatitis or autoimmune markers may also be necessary. What's crucial to understand is that while a GGT of 339 U/L is alarming, it is a marker of *injury* rather than a specific disease itself.

Prompt diagnosis and intervention are vital because many of the underlying causes, even severe ones, can be effectively managed or reversed if caught early, preventing more permanent liver damage.

The liver and Gamma-Glutamyl Transferase (GGT) LIVER Produces Gamma-Glutamyl Transferase (GGT) Blood supply Bile output Elevated Gamma-Glutamyl Transferase (GGT) may indicate liver cell damage or stress
for your numbersThe section below is written for 339 against a general adult target. What 339 means for you depends on the rest of your lipids and your other risk factors. Your report starts from your whole picture, not one line.

Hidden Risk of Gamma-Glutamyl Transferase (GGT) 339 U/L

A Gamma-Glutamyl Transferase (GGT) level of 339 U/L is a notable elevation that, if sustained, could point to potential underlying challenges affecting your overall health. While GGT isn't always tied to a severe illness, this particular value is quite high and could be reflecting significant ongoing stress on certain organs.

This sustained elevation might relate to conditions that, over time, can impact your energy levels, digestion, and general sense of well-being, influencing your quality of life. Understanding the factors that contribute to this level is a crucial step in promoting your long-term health, as prolonged imbalances can have widespread effects across the body.

The National Institutes of Health (NIH) emphasizes the importance of addressing persistent elevations to support metabolic health and organ function.

what this page cannot tell you

Kidney function reflected by creatinine affects how this marker is processed and what your levels actually mean

This page has not been given your Creatinine, so that half of the picture is missing here. It is describing the average reader with Gamma-Glutamyl Transferase (GGT), not you.

Read mine against my Creatinine →

A Gamma-Glutamyl Transferase (GGT) level significantly elevated to 339 U/L, indicating substantial liver stress or damage, carries heightened risks for developing serious hepatic complications. This extreme elevation is strongly associated with a greater likelihood of progressive fibrosis and cirrhosis, where healthy liver tissue is replaced by scar tissue, impairing its vital detoxification and metabolic functions.

Furthermore, such pronounced GGT levels can portend increased susceptibility to cholestasis, a condition where bile flow is obstructed, leading to further liver injury and potentially triggering complications like gallstones or cholangitis.

The underlying cause of this severe elevation also presents its own set of risks, which must be addressed promptly to prevent irreversible organ damage.

for your numbersThe risk below is the average one for this GGT. Whether it applies to you depends on the rest of your panel, which the article has not been given. Add them and this stops describing strangers.

This part is about the number

Everything below explains what raises Gamma-Glutamyl Transferase (GGT). It cannot tell you which of them is yours.

Your test can. Every marker on it is read against every other one, which is where the answer actually lives.

PDF or a photo of the printout · read in seconds

What Does a Gamma-Glutamyl Transferase (GGT) Level of 339 U/L Mean?

The Gamma-Glutamyl Transferase (GGT) enzyme acts like a dedicated sentinel within your body, primarily signaling activity or changes in the liver and bile ducts. When your GGT level is 339 U/L, it’s akin to a very loud and persistent alarm from this sentinel, indicating that something substantial is happening.

Imagine your liver as a busy factory, constantly processing substances and keeping your body clean. A GGT level of 339 U/L means the factory's internal processes are highly active, or perhaps facing a challenge that requires significant effort.

One of the most common reasons for such a pronounced elevation is the body's response to alcohol. Even moderate, regular alcohol intake can significantly increase GGT levels, and heavier consumption often leads to readings in this elevated range.

Another frequent contributor, especially in many parts of the world, is non-alcoholic fatty liver disease, a condition where excess fat builds up in liver cells, often linked to lifestyle factors like diet and weight.

Certain medications, especially those processed by the liver, can also cause GGT to rise as the liver works to metabolize them. Less commonly, other liver conditions or issues with the bile ducts (the tubes that carry digestive fluid from the liver) might also lead to this kind of elevated signal.

The American College of Gastroenterology highlights that while GGT is sensitive to liver changes, it often requires further investigation to pinpoint the exact cause for such a significant increase.

The most probable reasons for a Gamma-Glutamyl Transferase (GGT) reading of 339 U/L often involve chronic alcohol consumption, even if intermittent, as the liver struggles to metabolize the toxins. Another leading contender is non-alcoholic fatty liver disease (NAFLD), particularly its more inflammatory form, NASH, which is exacerbated by obesity, insulin resistance, and high-sugar diets.

Certain medications, including some anticonvulsants, statins, and even over-the-counter pain relievers taken in excess, can also induce this level of hepatic enzyme elevation by directly stressing liver cells or interfering with normal metabolic pathways.

Your GGT 339 means different things depending on your other markers

GGT + Hemoglobin
Hemoglobin levels combined with this marker can reveal underlying conditions that neither value shows on its own
GGT + Creatinine
Kidney function reflected by creatinine affects how this marker is processed and what your levels actually mean
GGT + Fasting Blood Glucose
Blood sugar status interacts with this marker in ways that change the clinical significance of your result
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for your numbersThis section lists every reason GGT moves, because on its own the number cannot say which is yours. The rest of your panel and a few risk factors would cross most of them off in a sentence.

Lifestyle Changes for Gamma-Glutamyl Transferase (GGT) 339 U/L

Addressing a Gamma-Glutamyl Transferase (GGT) level of 339 U/L often involves looking at daily habits beyond just what you eat. Regular physical activity plays a vital role in supporting liver health and metabolic balance.

Engaging in moderate exercise, like brisk walking, cycling, or swimming, for about 30 minutes most days of the week, can help improve how your body processes fats and sugars, which in turn can ease the burden on your liver.

Managing stress is another key factor; chronic stress can influence various bodily systems, including those related to liver function. Techniques like mindfulness, meditation, or spending time in nature can help regulate stress responses.

Ensuring adequate sleep, typically 7-9 hours per night for adults, allows your body to rest and repair, contributing to overall well-being. Furthermore, minimizing exposure to environmental toxins, such as certain industrial chemicals or pollutants, and being mindful of non-prescription substances that the liver processes, can also support its function.

The World Health Organization (WHO) emphasizes a holistic approach to health, recognizing that lifestyle choices collectively impact organ function and disease risk, making these adjustments important for anyone seeking to support their liver and potentially influence an elevated GGT.

With a Gamma-Glutamyl Transferase (GGT) level at 339 U/L, immediate and targeted action is critical. You should schedule a follow-up with your primary care physician without delay to discuss potential causes and undergo further diagnostic testing, which may include viral hepatitis serologies, autoimmune markers, and abdominal imaging such as an ultrasound or CT scan.

A referral to a hepatologist or gastroenterologist specializing in liver diseases is highly recommended. In parallel, a strict cessation of all alcohol intake is paramount, alongside a significant reduction in processed foods, saturated fats, and refined sugars from your diet, focusing instead on whole, unprocessed foods.

for your numbersThe portions below are generic because the page does not know your body. Add your height and weight above and the fibre targets resize to you at once, a small preview of what the full report does with every number.
for your numbersThe portions below are generic because the page does not know your body. Add your height and weight above and the fibre targets resize to you at once, a small preview of what the full report does with every number.

Diet Changes for Gamma-Glutamyl Transferase (GGT) 339 U/L

When your Gamma-Glutamyl Transferase (GGT) reaches a level like 339 U/L, dietary adjustments become a powerful tool in supporting your liver health and working towards a more balanced internal environment.

The food and drinks we consume directly impact how our liver functions, and making informed choices can help reduce the workload on this vital organ. Focusing on a nutrient-rich eating pattern, often described as a Mediterranean-style diet, can be particularly beneficial.

This includes prioritizing whole, unprocessed foods that are rich in antioxidants and fiber. Minimizing added sugars, highly processed foods, and unhealthy fats can also make a significant difference in how your liver processes nutrients.

The American Heart Association (AHA) and the American Diabetes Association (ADA) often promote these types of dietary patterns for overall metabolic health, which indirectly supports liver function.

Foods that support liver health Broccoli Cruciferous Coffee Liver-protective Fatty fish Omega-3s Nuts Vitamin E Olive Oil Healthy fats Reduce alcohol and processed foods to support liver recovery
for your numbersThe portions below are generic because the page does not know your body. Add your height and weight above and the fibre targets resize to you at once, a small preview of what the full report does with every number.

Gamma-Glutamyl Transferase (GGT) 339 U/L in Men, Women, Elderly, and Kids

The Gamma-Glutamyl Transferase (GGT) level of 339 U/L, while significantly elevated across all demographics, can sometimes be interpreted with slight nuances depending on age and biological sex. Generally, GGT levels can naturally be a little higher in men compared to women, even in healthy individuals, though 339 U/L far exceeds typical healthy ranges for both.

This difference is often attributed to hormonal influences. In older adults, GGT levels might show a slight natural increase with age, reflecting cumulative life exposures, but a reading of 339 U/L is still considered very high and warrants investigation regardless of age.

For children and adolescents, such a high GGT level is much less common and almost always points to a specific underlying health concern that needs prompt attention. Their developing bodies generally maintain lower GGT levels, so any substantial elevation is a clearer signal of an imbalance.

The National Institutes of Health (NIH) emphasizes that while population averages vary, a highly elevated GGT like 339 U/L is an important marker across all age groups and sexes, suggesting a need to explore contributing factors rather than attributing it solely to demographic differences.

for your numbersThe portions below are generic because the page does not know your body. Add your height and weight above and the fibre targets resize to you at once, a small preview of what the full report does with every number.

Medicine Effects on Gamma-Glutamyl Transferase (GGT) 339 U/L

Certain medications can influence Gamma-Glutamyl Transferase (GGT) levels, and when your GGT is 339 U/L, it's important to consider if any ongoing prescriptions or even over-the-counter remedies might be playing a role.

The liver is the body's primary processing plant for many drugs, and some medications can lead to an increase in GGT as a response to this metabolic activity. This doesn't necessarily mean the medication is causing harm, but it does indicate the liver is working harder.

Common examples of medications that can elevate GGT include certain anticonvulsants used for epilepsy, some types of cholesterol-lowering drugs (statins), and even some pain relievers when used regularly. It is never recommended to stop or change medications without first discussing with a healthcare professional, as they can assess the full picture of your health and medication regimen.

The Mayo Clinic often highlights the importance of a comprehensive review of all medications, supplements, and herbal remedies when investigating elevated liver markers like GGT, to understand potential interactions or effects.

for your numbersThe portions below are generic because the page does not know your body. Add your height and weight above and the fibre targets resize to you at once, a small preview of what the full report does with every number.

When to Retest Gamma-Glutamyl Transferase (GGT) 339 U/L

Given a Gamma-Glutamyl Transferase (GGT) level of 339 U/L, repeating the test is often a crucial step in understanding the overall picture and observing trends. A single test result provides a snapshot, but it doesn't tell the whole story of what's happening over time.

Repeating the GGT test, often alongside other related blood work, allows healthcare professionals to see if the level is stable, continuing to rise, or beginning to decrease in response to any changes in lifestyle or other interventions.

This follow-up also helps to rule out temporary fluctuations that might occur due to recent activities or short-term influences. The timing of a repeat test will depend on the initial evaluation and any identified causes, but it's a fundamental part of monitoring and managing any significantly elevated marker.

This approach aligns with best practices for laboratory test interpretation, emphasizing that health markers are dynamic and best understood in context over time, rather than as isolated readings.

for your numbersThe portions below are generic because the page does not know your body. Add your height and weight above and the fibre targets resize to you at once, a small preview of what the full report does with every number.

Gamma-Glutamyl Transferase (GGT) 339 U/L — Frequently Asked Questions

A Gamma-Glutamyl Transferase (GGT) level of 339 U/L is significantly elevated, and the most frequent causes include regular alcohol consumption and non-alcoholic fatty liver disease. Certain medications can also influence GGT levels, as can other liver or bile duct conditions. Understanding your lifestyle habits and medication history can provide important clues.

While a GGT of 339 U/L strongly suggests that your liver is under significant stress or active, it doesn't automatically mean you have a specific liver disease. GGT is a sensitive marker, but it's not specific.

This means it can be elevated for various reasons beyond just liver damage, such as certain medications or even heavy alcohol intake. Further evaluation with additional tests and a comprehensive health assessment is typically needed to determine the exact cause.

for your numbersThe portions below are generic because the page does not know your body. Add your height and weight above and the fibre targets resize to you at once, a small preview of what the full report does with every number.

Given a Gamma-Glutamyl Transferase (GGT) level of 339 U/L, a key initial step is to review your lifestyle, particularly your alcohol consumption, and consider a balanced, liver-friendly diet rich in whole foods.

Engaging in regular physical activity can also be beneficial. It's crucial to consult with a healthcare professional to discuss your specific result, review all medications, and determine the most appropriate next steps for your individual health.

When to See a Doctor About Gamma-Glutamyl Transferase (GGT) 339 U/L

A Gamma-Glutamyl Transferase (GGT) level of 339 U/L is a substantially elevated reading that warrants prompt attention from a healthcare professional. While this information is for educational purposes, such a significant deviation from typical levels means it’s crucial to discuss these results with your doctor.

They can provide a personalized interpretation in the context of your overall health, medical history, and other test results. Your doctor will be able to guide you through further evaluations, which might include additional blood tests, imaging studies, or a detailed review of your lifestyle and medications.

This collaborative approach ensures that any underlying causes for the elevated GGT are identified and addressed appropriately, leading to a tailored plan for your well-being. Proactively seeking this professional guidance is a responsible step in managing your health.

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