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

402 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 356 U/L over the normal ceiling of 46. That reads very high.

402 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) 402 U/L: Is That High?

Yes. 402 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 402 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.
402 and 3810.6GGT 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) 402 U/L Low, Normal, or High?

Gamma-Glutamyl Transferase (GGT) 402 U/L might be considered significantly high. This value extends well beyond typical reference ranges, strongly suggesting that further exploration into potential underlying health factors is important.

Such a reading often signals a need to understand various influences on your body's systems, with common causes frequently related to liver health, medication interactions, or lifestyle choices. Understanding what this specific value means for you is a crucial first step toward better health insights.

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 402 U/L falls into the very high category, clinically signaling a significant and concerning problem primarily affecting the liver or bile ducts. This profoundly elevated reading, nearly eight times above the normal upper limit, frequently points towards conditions demanding urgent attention, such as severe alcoholic liver disease, acute viral hepatitis, or significant bile duct obstruction from gallstones, tumors, or other inflammatory processes.

To accurately diagnose the underlying cause, further immediate diagnostic steps are essential. These typically include a comprehensive liver function panel, checking markers like ALT, AST, ALP, and bilirubin to delineate the pattern of injury, alongside abdominal imaging such as an ultrasound or MRI to visualize the liver, gallbladder, and bile ducts for structural abnormalities.

What’s often overlooked is that while a GGT of 402 U/L is a critical alarm, it is not a specific diagnosis in itself; it primarily indicates stress or damage, necessitating a thorough medical workup to identify the precise etiology and initiate targeted management, rather than simply monitoring alone. This ensures any progressive damage can be swiftly addressed.

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 402 against a general adult target. What 402 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) 402 U/L

A Gamma-Glutamyl Transferase (GGT) 402 U/L reading points to a substantial elevation, which can be a signal that your body is under stress, particularly in areas like the liver and bile ducts.

This level is far beyond what is considered typical and suggests that there may be active processes at play that warrant attention. Sustained high GGT levels can sometimes be linked to a range of potential issues, from conditions directly impacting the liver to broader metabolic concerns or even certain medication effects.

The American Liver Foundation emphasizes that even without obvious symptoms, persistently elevated GGT requires investigation to identify and address any underlying causes proactively. Ignoring such a significant elevation means missing an opportunity to understand your body's signals and potentially prevent future complications.

Exploring the root cause behind Gamma-Glutamyl Transferase (GGT) 402 U/L is key to maintaining your long-term wellness. A high reading at this level is a strong indicator that proactive steps are warranted to understand your health.

Taking action now can help you gain valuable insights and work towards better health outcomes.

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 of 402 U/L, significantly elevated above the normal range, signals substantial ongoing liver stress. This extreme elevation strongly suggests active hepatocellular damage or significant bile duct obstruction.

Such a high value increases the immediate risk of developing complications like jaundice, liver fibrosis progression, or acute liver injury, potentially impairing the liver's vital detoxification and metabolic functions. The underlying cause, if left unaddressed, can lead to more severe liver disease, including cirrhosis and even liver failure, demanding urgent investigation to prevent irreversible damage and preserve remaining liver function.

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 402 U/L Mean?

When your Gamma-Glutamyl Transferase (GGT) is at 402 U/L, it’s helpful to understand what GGT is and why this number matters. GGT is an enzyme, which means it’s a protein that helps speed up chemical reactions in your body.

It is found in many organs, including the liver, bile ducts, kidneys, pancreas, and heart. However, it’s most concentrated in the liver and bile ducts. Think of GGT as a tiny worker present in the cells of these organs.

When cells in these areas are damaged or stressed, or when the flow of bile is blocked, these little GGT workers can leak out into the bloodstream in larger numbers.

A value of 402 U/L indicates a significant release of this enzyme, suggesting that there is considerable activity or challenge within these systems. While a slightly elevated GGT might sometimes be an incidental finding, a Gamma-Glutamyl Transferase (GGT) 402 U/L level is a much stronger indicator that something substantial is occurring, often pointing to issues like inflammation in the liver, blockages in the bile ducts that carry digestive fluid, or even the effects of certain substances.

It’s like a smoke detector blaring loudly, telling you there’s more than just a faint whiff of smoke. The World Health Organization (WHO) often highlights the importance of such specific enzyme markers in assessing organ health because they provide a biochemical snapshot of internal processes.

This specific level tells us that the 'smoke detector' is sounding a clear alarm, and understanding the source of this signal is the next crucial step. It’s not just a minor fluctuation; it’s a distinct sign that merits a closer look.

An isolated GGT reading of 402 U/L, especially when other liver enzymes like ALT and AST are less dramatically elevated, often points towards biliary tract issues or a direct insult to the liver primarily affecting GGT.

The most probable causes include heavy alcohol consumption, particularly chronic and recent intake, or certain medications known to induce GGT. Gallstones or other forms of biliary obstruction are also strong contenders.

Less commonly, but still plausible, are non-alcoholic fatty liver disease (NAFLD) with significant inflammation or viral hepatitis, though these often raise ALT/AST more prominently.

Your GGT 402 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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The part one number cannot show
Your GGT of 402 means different things depending on its companion markers.
Your full panel shows which story is yours.
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Lifestyle Changes for Gamma-Glutamyl Transferase (GGT) 402 U/L

Addressing a Gamma-Glutamyl Transferase (GGT) 402 U/L reading often involves looking at various lifestyle factors beyond just what you eat. Your daily habits can significantly influence how your body functions, especially your liver and overall metabolic health.

Engaging in regular physical activity is one foundational step. The Centers for Disease Control and Prevention (CDC) consistently recommends a blend of aerobic activities and muscle-strengthening exercises for general health.

Even moderate activities, such as brisk walking, swimming, or cycling for about 30 minutes most days of the week, can contribute to reducing inflammation and supporting healthy metabolic pathways. Managing stress is another vital component.

Chronic stress can impact your body in many ways, including its inflammatory responses. Techniques like meditation, deep breathing exercises, yoga, or spending time in nature can help calm your nervous system.

These practices don't directly lower GGT, but they foster an environment where your body can heal and regulate itself more effectively. Furthermore, limiting exposure to environmental toxins and being mindful of your alcohol intake is particularly important when your Gamma-Glutamyl Transferase (GGT) is at 402 U/L.

Alcohol is a well-known factor that can significantly raise GGT levels, and at this elevation, reducing or avoiding alcohol can be a key strategy. The National Institutes of Health (NIH) frequently publishes research indicating the profound impact of alcohol on liver enzymes.

Ensuring you get adequate sleep, typically 7-9 hours per night for adults, also plays a critical role in your body's repair processes and overall well-being. These non-dietary lifestyle adjustments work together to create a supportive environment for your body to restore balance and potentially influence enzyme levels over time.

Immediate medical evaluation is paramount for a GGT of 402 U/L. Schedule an urgent appointment with your physician to review your medical history, medications, and alcohol intake. Further blood tests, including a comprehensive liver panel (ALT, AST, ALP, Bilirubin), viral hepatitis serologies, and potentially auto-immune markers, are crucial.

Imaging studies like an abdominal ultrasound or MRCP will likely be ordered to assess the liver and bile ducts for structural abnormalities. Abstain from all alcohol and review all prescribed and over-the-counter medications with your doctor for potential hepatotoxicity.

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.
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) 402 U/L

When your Gamma-Glutamyl Transferase (GGT) is at 402 U/L, focusing on dietary adjustments can be a powerful way to support your body's systems, especially your liver. Nutrition plays a fundamental role in how your liver processes substances and manages inflammation.

Emphasizing whole, unprocessed foods is a key strategy. This means prioritizing a diet rich in fruits, vegetables, and whole grains, which provide essential vitamins, minerals, and antioxidants. Antioxidants help protect your cells from damage, which is especially important when GGT levels are elevated.

Reducing your intake of highly processed foods, sugary drinks, and unhealthy fats can also make a significant difference. These items can contribute to inflammation and place additional strain on your liver.

For instance, the American Heart Association (AHA) often highlights the benefits of a diet rich in plant-based foods for overall cardiovascular and metabolic health, which indirectly supports liver function. Furthermore, ensuring adequate hydration by drinking plenty of water throughout the day helps your body's detoxification processes.

At a Gamma-Glutamyl Transferase (GGT) 402 U/L level, choosing foods that actively support liver health is paramount. Consider incorporating specific foods known for their beneficial properties. Prioritizing these nutritional changes is an empowering step towards better health.

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) 402 U/L in Men, Women, Elderly, and Kids

Understanding how Gamma-Glutamyl Transferase (GGT) levels might differ across various groups, such as men, women, the elderly, and children, is important, but a reading of 402 U/L stands out as significantly high for virtually everyone, regardless of these demographics.

While there can be slight variations in the typical reference ranges used for different age groups or sexes, a value of 402 U/L far exceeds the upper limits for all of them.

For instance, what might be considered a mildly elevated GGT for an adult male could be a different number than for an adult female, but 402 U/L is universally elevated.

In children, GGT levels are naturally higher at birth but typically decline rapidly in the first year of life. After that, persistently high levels like Gamma-Glutamyl Transferase (GGT) 402 U/L in a child would be a very strong signal for further medical investigation, potentially pointing to specific conditions affecting the liver or bile ducts that require immediate attention.

Similarly, in the elderly, while some metabolic changes occur with aging, a GGT of 402 U/L is still a profoundly high value. It doesn't become 'normal' simply because someone is older.

The Mayo Clinic often emphasizes that such significant elevations, regardless of age or sex, warrant thorough evaluation to pinpoint the underlying cause. The presence of such a high level across these groups doesn't change the message that further investigation is needed; rather, it underscores the urgency and importance of understanding why GGT is so high. It indicates that the biological 'alarm' is sounding loudly for everyone.

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) 402 U/L

Certain medications are known to affect liver enzymes, and this can sometimes lead to an elevation in Gamma-Glutamyl Transferase (GGT). When your GGT reading is 402 U/L, it's crucial to consider if any medicines you are currently taking might be contributing to this elevation.

However, a level of 402 U/L is quite substantial, which often prompts a deeper look beyond just medication side effects, although medications certainly can be a factor. Some common prescription and over-the-counter drugs, as well as herbal supplements, have the potential to impact liver function.

For example, certain anticonvulsants, antidepressants, and even some cholesterol-lowering medications are known to sometimes increase GGT levels. The National Kidney Foundation (NKF) notes that GGT is often used to assess liver health, and understanding drug-induced liver injury is a critical area of focus.

It's important never to stop or change medications without first discussing it with your healthcare provider, as they can help determine if a drug is truly the cause of such a high Gamma-Glutamyl Transferase (GGT) 402 U/L level and explore safer alternatives if necessary.

Your medical history, including all current medications, is a vital piece of information for interpreting this lab result. Open communication with your doctor about all substances you consume, including supplements, is paramount to understanding potential influences on your GGT level.

Reviewing all your current medications with a healthcare professional can help pinpoint any potential drug-related influences. Discussing whether dosage adjustments or alternative therapies might be appropriate is an important step.

Be transparent about any supplements or herbal remedies you are using, as these can also interact with your liver.

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) 402 U/L

Given a Gamma-Glutamyl Transferase (GGT) 402 U/L reading, the question of when to repeat the test is very important. This is not a level that would typically be ignored or simply re-checked 'sometime later.' A reading of 402 U/L is significantly high and usually prompts immediate discussions with your healthcare provider to understand the potential underlying causes.

Your doctor will likely recommend specific follow-up actions, which could include other tests, further evaluations, and a timeline for rechecking GGT. The timing of a repeat test will depend entirely on what your healthcare provider discovers during their investigation.

For example, if a specific lifestyle change is recommended, like reducing alcohol intake, your doctor might suggest retesting in a few weeks or months to see if the GGT level has responded.

If medication adjustments are made, a similar re-evaluation period might be advised. The American College of Gastroenterology (ACG) often emphasizes a systematic approach to evaluating elevated liver enzymes, and follow-up testing is a key part of this process.

It helps to monitor trends, assess the effectiveness of any interventions, and ensure that the GGT level is moving in a healthier direction. A Gamma-Glutamyl Transferase (GGT) 402 U/L is a strong signal, and repeating the test is part of the process to track progress and confirm the impact of any changes or treatments initiated based on the initial high reading. Always follow the specific guidance of your healthcare team regarding repeat testing.

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) 402 U/L — Frequently Asked Questions

A Gamma-Glutamyl Transferase (GGT) 402 U/L is a very high level, indicating substantial activity or stress, often in the liver. While this level is a strong signal that merits investigation into liver health, it doesn't automatically confirm severe liver disease.

High GGT can be elevated due to various reasons, including certain medications, lifestyle factors like heavy alcohol consumption, or issues with bile flow. It strongly suggests a need for further evaluation to pinpoint the exact cause and understand its implications for your health.

When Gamma-Glutamyl Transferase (GGT) 402 U/L is found, healthcare providers often recommend a panel of additional blood tests to get a fuller picture of liver health and rule out other conditions.

These commonly include other liver enzymes like ALT (alanine aminotransferase) and AST (aspartate aminotransferase), as well as bilirubin, alkaline phosphatase (ALP), and albumin. These comprehensive tests help to differentiate between various causes of GGT elevation and provide more specific insights into what might be happening within your body.

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 a Gamma-Glutamyl Transferase (GGT) 402 U/L level, significant diet and lifestyle changes can certainly play a vital role in supporting your liver and overall health, potentially helping to lower GGT.

Reducing alcohol intake, adopting a balanced diet rich in whole foods, managing stress, and regular physical activity are all beneficial. However, due to the substantial elevation of 402 U/L, it is crucial to first work with a healthcare provider to identify the underlying cause.

While lifestyle adjustments are powerful, they might be part of a broader management plan that could also include other medical approaches, depending on what the investigation reveals.

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 See a Doctor About Gamma-Glutamyl Transferase (GGT) 402 U/L

Discovering a Gamma-Glutamyl Transferase (GGT) 402 U/L reading is a clear signal that it's time to consult with your healthcare provider. This is not a value to simply monitor on your own, as it is significantly elevated and suggests that underlying health factors require attention.

Your doctor can help you understand what this specific number means in the context of your overall health, medical history, and any other symptoms you might be experiencing. They will likely recommend further tests to thoroughly investigate potential causes, such as conditions affecting the liver, bile ducts, or other organs, and to assess the extent of any impact.

Proactive communication with your healthcare team is essential. They can guide you through the process of understanding your results, discussing potential lifestyle adjustments, and exploring any necessary medical interventions. Taking this step ensures you receive personalized information and support to address the Gamma-Glutamyl Transferase (GGT) 402 U/L finding effectively and work towards maintaining your health and well-being.

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A page like this one, written about you.

You have just spent a few minutes reading a page written for a number. Upload your whole test and you get the same thing written for your body: every marker read against every other, in the order they should be fixed, as something you read rather than a dashboard you have to decode.

  • Read in orderWhich number to deal with first, and which ones are only following it.
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