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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
373 U/L very high
0 from your result
elevatedvery high
1normal 5 to 41500
what this means

373 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 332 U/L over the normal ceiling of 41. That reads very high.

373 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) 373 U/L: Is That High?

Yes. 373 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 24, 2026

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YOUR NUMBERS

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

Values in U/L. Your Aspartate Aminotransferase (AST) of 373 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
373 ÷ 38 =9.8AST 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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Every marker on your test, read against your age and sex. Free.

Is Aspartate Aminotransferase (AST) 373 U/L Low, Normal, or High?

Aspartate Aminotransferase (AST) 373 U/L might be considered a high result when compared to typical reference ranges. This enzyme level often falls above what is usually observed in general health screenings, suggesting that cells where Aspartate Aminotransferase (AST) is found may have experienced some form of disruption.

While a single number does not tell the whole story, an elevated Aspartate Aminotransferase (AST) level often prompts further exploration. Understanding what this specific value means can empower you to engage more fully in discussions about your overall well-being.

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 373 U/L is a critically elevated finding, signaling significant acute cellular damage, most commonly affecting the liver or skeletal muscles. This value is over eight times the upper limit of the normal range, indicating a serious issue that demands immediate medical attention.

At this magnitude, common culprits include acute viral hepatitis, drug-induced liver injury (such as from acetaminophen overdose or certain medications), or substantial muscle breakdown like rhabdomyolysis following severe trauma, intense exertion, or certain drug reactions.

This isn't a level that can be monitored over time; an AST of 373 U/L prompts an urgent diagnostic workup. You can expect your healthcare provider to order additional tests immediately, such as a comprehensive liver panel including Alanine Aminotransferase (ALT), bilirubin, and alkaline phosphatase, to specifically assess liver function and identify patterns suggestive of particular liver diseases.

If muscle damage is suspected, a Creatine Kinase (CK) test will be crucial. Imaging, like an abdominal ultrasound, might also be performed. What patients often aren't told is that while this level is alarming, the *trend* in subsequent measurements, alongside clinical symptoms like nausea, dark urine, or muscle pain, will heavily influence treatment decisions.

The exact cause needs swift identification, as interventions vary widely and can be time-sensitive, underscoring the urgency of follow-up.

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 373 against a general adult target. What 373 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 Aspartate Aminotransferase (AST) 373 U/L

An elevated Aspartate Aminotransferase (AST) 373 U/L could be a signal from your body, suggesting that certain cells might be under stress or experiencing damage. Aspartate Aminotransferase (AST) is an enzyme, a type of protein, found inside various cells throughout your body, including those in the liver, heart, skeletal muscles, and kidneys.

When these cells are injured or damaged, the Aspartate Aminotransferase (AST) enzyme can leak out of them and enter the bloodstream, which is then detected in a blood test. A high level, such as Aspartate Aminotransferase (AST) 373 U/L, often indicates that more investigation might be helpful to pinpoint the source of this cellular activity.

While it does not diagnose a specific condition, it acts as a valuable piece of information for your healthcare provider. Understanding these potential indications can help you prepare for a more informed conversation with your medical team about your Aspartate Aminotransferase (AST) 373 U/L result.

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 significantly elevated Aspartate Aminotransferase (AST) level, such as the 373 U/L observed, signals substantial hepatocellular injury or damage to other tissues like the heart or muscles. This degree of elevation often points towards acute or severe chronic liver conditions, increasing the risk of acute liver failure, where the liver rapidly loses its function, posing an immediate life threat.

Furthermore, such a high AST can indicate severe viral hepatitis, drug-induced liver injury, or ischemic hepatitis, where liver cells die due to lack of oxygen, potentially leading to irreversible scarring (fibrosis) or cirrhosis over time if the underlying cause is not addressed promptly. This level necessitates urgent evaluation to prevent progressive organ damage.

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.

Here are some general areas that might be explored in the context of an elevated Aspartate Aminotransferase (AST):

  • **Cellular health:** Exploring the health status of cells in organs where AST is abundant.
  • **Body's responses:** Understanding how your body is responding to various internal or external factors.

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.

PDF or a photo of the printout · read in seconds

What Does a Aspartate Aminotransferase (AST) Level of 373 U/L Mean?

Aspartate Aminotransferase (AST), often simply called AST, is an enzyme that plays a crucial role inside cells by helping to convert food into energy. Think of enzymes as tiny workers that perform specific jobs within your body's cells.

They are normally contained within these cells, which is where they carry out their vital functions. When cells are healthy, very little Aspartate Aminotransferase (AST) is found in the bloodstream.

However, when cells are damaged or inflamed, their membranes can become permeable, allowing these enzymes to escape into the circulating blood. This leakage is what laboratory tests measure. A result like Aspartate Aminotransferase (AST) 373 U/L means that a notable amount of this enzyme has entered the bloodstream, potentially pointing to cellular damage in one or more of the tissues where Aspartate Aminotransferase (AST) is highly concentrated.

This could include the liver, heart, muscles, or kidneys, among others. It is important to remember that Aspartate Aminotransferase (AST) is not exclusive to one organ, so an elevated level serves as a general indicator of cellular disruption rather than a specific diagnosis.

A healthcare professional would consider this Aspartate Aminotransferase (AST) 373 U/L value alongside your complete health picture, including other test results and your personal health history, to understand its full meaning. This comprehensive approach is key to interpreting any lab finding accurately.

An AST value of 373 U/L most plausibly stems from acute viral hepatitis (like Hepatitis A, B, or E) or a severe reaction to certain medications or toxins. For instance, acetaminophen overdose or exposure to specific herbal supplements can cause a rapid and significant spike in AST as liver cells are acutely damaged.

Less commonly, but still possible at this level, is a substantial acute insult to the heart muscle, such as a recent myocardial infarction, or severe rhabdomyolysis, where muscle tissue breaks down extensively.

While chronic conditions can elevate AST, this magnitude strongly suggests an acute, ongoing insult rather than gradual progression.

Your AST 373 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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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.

Lifestyle Changes for Aspartate Aminotransferase (AST) 373 U/L

While dietary adjustments are important, other aspects of your daily life can also significantly influence your overall well-being and, indirectly, enzyme levels like Aspartate Aminotransferase (AST). Embracing a balanced lifestyle can be a powerful way to support your body's health.

For instance, regular physical activity is often recommended by health organizations like the American Heart Association (AHA) for its numerous benefits, including supporting muscle health and circulation. It is about finding activities that you enjoy and can sustain over time, such as brisk walking, swimming, or cycling.

The key is consistency and choosing an activity level appropriate for your current health status. Adequate sleep is another cornerstone of good health, as your body uses this time for repair and restoration.

Poor sleep patterns can place additional stress on your system, which can have broad effects. Stress management techniques are also vital; chronic stress can impact various bodily functions. Activities like mindfulness, meditation, yoga, or spending time in nature can help manage stress effectively.

Avoiding excessive alcohol consumption is another critical lifestyle choice, as alcohol can affect the health of many cells, especially in the liver, where Aspartate Aminotransferase (AST) is abundant. These lifestyle considerations, when viewed holistically, contribute to a supportive environment for cellular health and can play a role in maintaining balanced bodily functions.

Discussing these aspects with a healthcare provider can help tailor advice to your unique needs, especially when considering an Aspartate Aminotransferase (AST) 373 U/L reading.

With an AST reading of 373 U/L, immediate medical attention is paramount. Schedule an urgent appointment with your primary care physician or proceed directly to an urgent care or emergency department.

Do not delay. Further investigations will likely include a panel for viral hepatitis, a complete blood count, liver function tests including ALT, bilirubin, and albumin, and potentially cardiac enzymes if cardiac involvement is suspected.

It is crucial to report all medications, supplements, and recent alcohol intake. A follow-up AST and ALT test within 24-48 hours is often recommended to monitor the trend. Focus on abstaining completely from alcohol and any over-the-counter pain relievers not explicitly approved by your physician.

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

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.
  • Written, not chartedThe same voice as this page, about your own blood, on your own page.
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