Your full report
$15/month. Cancel anytime, the report stays yours.
Everything else
Tell it who you are and what else was on your test. Every line below, including the article, rewrites itself as you go.
reading page 1…
Written for you, just now
Six systems are talking to each other in your blood.every marker read against the others · in the order to deal with them · your twelve weeks
add any marker from your test
373 is very high for AST, enough that the number itself is the problem.
this is the average reading · make it yours below
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.
Your BloodMarker report · Aspartate Aminotransferase (AST)
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.
Upload or photograph your blood test and see every marker explained in seconds. Free.
Upload my blood testYOUR NUMBERS
Values in U/L. Your Aspartate Aminotransferase (AST) of 373 is marked.
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.
Every marker on your test, read against your age and sex. Free.
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.
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.
Here are some general areas that might be explored in the context of an elevated Aspartate Aminotransferase (AST):
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
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.
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.
Free calculators for this marker
Before you go
This page suggests retesting in 3 months. We will email you then, once, with what to compare against. Nothing else, ever.
One email, in 3 months. Unsubscribe in one click. We never store your results, only the marker name. Privacy
What you actually get
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.
Keep reading
Blood values are never read alone. These are the ones that sit next to yours.
Sources & References
Related Markers You Should Also Check
Commonly Seen Together
Blood test results rarely exist in isolation. When one marker is out of range, these related values are often checked alongside it:
Other Aspartate Aminotransferase (AST) Values
Check these next
Commonly seen together
Other hemoglobin values
Sources