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HDL42
Triglycerides180
ApoB110
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Alanine Aminotransferase (ALT)mg/dL
Gamma-Glutamyl Transferase (GGT)mg/dL
Alkaline Phosphatase (ALP)mg/dL
337 U/L very high
0 from your result
elevatedvery high
1normal 5 to 41500
what this means

337 is very high for AST, 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 296 U/L over the normal ceiling of 41. That reads very high.

337 is very high. That is above the normal range for AST. 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 · Aspartate Aminotransferase (AST)

Aspartate Aminotransferase (AST) 337 U/L: Is That High?

Yes. 337 U/L is well outside the normal range for AST.

But a number alone is only half the story. Your Alanine Aminotransferase (ALT), Gamma-Glutamyl Transferase (GGT) 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 22, 2026

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YOUR NUMBERS

Normal: <40
Raised: 40-79
High: 80+

Values in U/L. Your Aspartate Aminotransferase (AST) of 337 is marked.

What they say together.

Aspartate Aminotransferase (AST) 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/LexampleRAISED
337 ÷ 38 =8.9AST to ALT ratio, the De Ritis ratio. Under 1 is the usual fatty-liver pattern; above 2 points at alcohol.
62 and 381.6GGT 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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Is Aspartate Aminotransferase (AST) 337 U/L Low, Normal, or High?

Aspartate Aminotransferase (AST) 337 U/L might be considered an elevated level compared to typical reference ranges. When the Aspartate Aminotransferase (AST) value reaches 337 U/L, it suggests that something could be causing more AST to be present.

This particular level is generally higher than what is commonly seen in healthy individuals. Understanding what might lead to this elevation can be a step toward understanding your overall well-being. Let's explore what this number might mean for you.

what this page cannot tell you

The AST/ALT ratio above 2:1 suggests alcoholic liver disease. Near 1:1 points to non-alcoholic fatty liver. Which is yours?

This page has not been given your ALT, so that half of the picture is missing here. It is describing the average reader with Aspartate Aminotransferase (AST), not you.

Read mine against my ALT →

An Aspartate Aminotransferase (AST) level of 337 U/L signals a critically elevated finding, soaring far beyond the normal reference range of 5-40 U/L and indicating significant cellular damage. This value, exceeding the upper limit by over 700%, typically points to a severe, acute event demanding immediate medical attention, rather than a chronic or mild issue.

Most commonly, such a pronounced elevation stems from extensive damage to liver cells, as observed in conditions like severe acute viral hepatitis, acute drug-induced liver injury, or ischemic hepatitis, where blood flow to the liver is compromised.

Alternatively, massive skeletal muscle injury, such as rhabdomyolysis from severe trauma, prolonged immobilization, or extreme exertion, can also cause AST to climb to this level. Given the urgency, a comprehensive workup will immediately involve further blood tests like Alanine Aminotransferase (ALT), bilirubin, and Creatine Kinase (CK) to pinpoint the source of damage, alongside potential viral hepatitis panels or drug screens and imaging studies.

Patients should understand that while this reading is undoubtedly alarming, identifying the precise underlying cause quickly is paramount, as many conditions leading to a 337 U/L AST are treatable, with outcomes significantly improved by prompt diagnosis and targeted intervention.

The liver and Aspartate Aminotransferase (AST) LIVER Produces Aspartate Aminotransferase (AST) Blood supply Bile output Elevated Aspartate Aminotransferase (AST) may indicate liver cell damage or stress
for your numbersThe section below is written for 337 against a general adult target. What 337 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.
for your numbersThe risk below is the average one for this AST. 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.

Hidden Risk of Aspartate Aminotransferase (AST) 337 U/L

An elevated Aspartate Aminotransferase (AST) 337 U/L reading can sometimes hint at underlying issues that might not be obvious from how you feel day-to-day. While AST is found in several parts of the body, including the liver, heart, muscles, and kidneys, a significant elevation like Aspartate Aminotransferase (AST) 337 U/L often points towards potential cell damage or stress within these organs.

It’s important to understand that AST itself isn’t a disease but a sign that cellular activity might be heightened in some way. This particular level, Aspartate Aminotransferase (AST) 337 U/L, invites a closer look at various aspects of health, ranging from liver function to muscle integrity.

Exploring potential influences on AST levels can offer insights into areas of well-being that might benefit from attention.

what this page cannot tell you

AST and ALP together distinguish between liver cell damage and cholestatic disease, which have completely different treatments.

This page has not been given your ALP, so it cannot tell you which of those you are. It is describing the average reader with Aspartate Aminotransferase (AST), not you.

Read mine against my ALP →

A very high aspartate aminotransferase (AST) level, such as the one measured at 337 U/L, significantly elevates the risk for acute liver injury. This level suggests substantial hepatocellular damage, which can impair the liver's ability to detoxify the blood and produce essential proteins.

If the underlying cause is not addressed, this persistent inflammation can progress to fibrosis and potentially cirrhosis, leading to irreversible scarring and loss of liver function. Furthermore, severe liver stress at this magnitude can sometimes precipitate hepatic encephalopathy, a condition where toxins build up in the brain, causing confusion and neurological disturbances.

for your numbersThis section lists every reason AST 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.
  • Potential tissue damage.
  • Increased cellular activity.

This part is about the number

Everything below explains what raises Aspartate Aminotransferase (AST). 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.

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What Does a Aspartate Aminotransferase (AST) Level of 337 U/L Mean?

Aspartate Aminotransferase, or AST, is a protein, an enzyme, crucial for metabolism. Think of enzymes as tiny workers in your body that help chemical reactions happen. AST is found in many cells throughout your body, with higher amounts in your liver, heart, muscles, kidneys, and even your red blood cells.

When these cells are damaged or inflamed, they can release AST into the bloodstream. This is why an elevated Aspartate Aminotransferase (AST) 337 U/L level can sometimes be a signal that something is happening within these tissues.

It's like an alert system. While Aspartate Aminotransferase (AST) 337 U/L itself doesn't tell you exactly which organ is affected, it prompts further investigation. Often, healthcare providers look at AST in conjunction with another enzyme called Alanine Aminotransferase (ALT), which is more specific to the liver.

If both AST and ALT are elevated, especially with ALT being higher, it often points more strongly to the liver. However, if AST is significantly higher than ALT, or if there's no ALT elevation, it might suggest issues with other organs like the heart or muscles.

The measurement of Aspartate Aminotransferase (AST) 337 U/L, therefore, is an important piece of information that helps build a broader picture of your internal health. It encourages a thoughtful exploration of possible causes, rather than serving as a definitive diagnosis on its own.

An AST reading of 337 U/L, being significantly above the normal range, points towards acute hepatocellular injury. The most probable causes include viral hepatitis (like Hepatitis A, B, or C), a recent injury to the liver from toxins, such as excessive alcohol consumption or certain over-the-counter medications like acetaminophen taken in high doses.

Less commonly, it could represent the early stages of autoimmune hepatitis or a sudden overload of fatty deposits in the liver (acute fatty liver). Non-liver causes like severe muscle damage from extreme exertion or injury could also contribute, but are less likely to cause this specific elevation without other supporting symptoms.

Your AST 337 means different things depending on your other markers

AST + ALT
The AST/ALT ratio above 2:1 suggests alcoholic liver disease. Near 1:1 points to non-alcoholic fatty liver. Which is yours?
AST + ALP
AST and ALP together distinguish between liver cell damage and cholestatic disease, which have completely different treatments.
AST + Creatine Kinase
If your CK is also high, your elevated AST might be from muscle damage, not liver damage at all.
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The part one number cannot show
Your AST of 337 means different things depending on its companion markers.
Your full panel shows which story is yours.
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Lifestyle Changes for Aspartate Aminotransferase (AST) 337 U/L

While specific medical guidance is always personal, various general lifestyle choices can contribute to overall well-being and might support healthy organ function, which in turn could influence levels like Aspartate Aminotransferase (AST) 337 U/L.

Engaging in regular, moderate physical activity, for instance, is known to support cardiovascular health and can help manage weight, which benefits the liver. The American Heart Association often recommends at least 150 minutes of moderate-intensity aerobic exercise per week.

It's important to find activities you enjoy and that fit your fitness level. Avoiding excessive alcohol consumption is another critical step, as alcohol is a well-known stressor for the liver, one of the primary organs where AST is abundant.

Reducing or eliminating alcohol can significantly reduce the burden on this vital organ. Managing stress through practices like mindfulness, meditation, or spending time in nature can also have a positive ripple effect throughout the body.

Chronic stress can impact various bodily systems, and finding healthy coping mechanisms is valuable. Ensuring you get adequate, restful sleep each night allows your body to repair and regenerate, supporting overall cellular health.

Typically, 7-9 hours of sleep for adults is recommended by organizations like the National Sleep Foundation. Furthermore, avoiding exposure to environmental toxins, where possible, can lessen the workload on your detoxification organs.

These supportive habits, when consistently practiced, contribute to a healthier internal environment and can play a role in maintaining balanced bodily functions, which might indirectly influence readings such as Aspartate Aminotransferase (AST) 337 U/L. They empower you to take an active role in your health journey.

With an AST at 337 U/L, immediate medical re-evaluation is paramount. Schedule an urgent appointment with your primary care physician or a gastroenterologist/hepatologist. They will likely order a panel of tests to pinpoint the cause, including viral hepatitis serologies, autoimmune markers, and a repeat liver function panel including ALT, ALP, and bilirubin.

Discuss all medications and supplements you are taking and any recent alcohol intake or strenuous physical activity. Temporarily cease alcohol consumption and any non-essential medications, particularly acetaminophen, until the cause is determined.

Dietary modifications focusing on reduced processed foods and healthy fats may be beneficial as an adjunct.

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.

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What you actually get

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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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