Everything else

Make it yours.

Tell it who you are and what else was on your test. Every line below, including the article, rewrites itself as you go.

HDL42
Triglycerides180
ApoB110
Every marker at once a PDF or a photo of the printout, read in seconds

add any marker from your test

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

344 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 303 U/L over the normal ceiling of 41. That reads very high.

344 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.

recheck in 12 weeks

Your BloodMarker report · Aspartate Aminotransferase (AST)

Aspartate Aminotransferase (AST) 344 U/L: Is That High?

Yes. 344 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

Have your results in hand?

Upload or photograph your blood test and see every marker explained in seconds. Free.

Upload my blood test

YOUR NUMBERS

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

Values in U/L. Your Aspartate Aminotransferase (AST) of 344 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
344 ÷ 38 =9.1AST 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.
Read my whole panel →

Every marker on your test, read against your age and sex. Free.

Is Aspartate Aminotransferase (AST) 344 U/L Low, Normal, or High?

Aspartate Aminotransferase (AST) 344 U/L might be considered higher than typical reference ranges for adults. While normal ranges can vary slightly between different laboratories, an Aspartate Aminotransferase (AST) reading of 344 U/L is often seen as elevated.

This elevated level indicates that there might be some activity occurring within your body that warrants attention. Understanding what this specific result could mean is the first step toward gaining clarity about your 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 344 U/L is a critical finding, significantly elevated from the normal range of 5-40 U/L, signaling substantial cellular damage requiring immediate medical attention. This value is characteristic of acute injury, most frequently affecting the liver.

Highly probable causes at this extreme level include acute viral hepatitis (e.g., Hepatitis A, B, or C), severe drug-induced liver injury (such as from acetaminophen overdose or certain prescription medications), or an acute flare of alcoholic hepatitis.

While AST is primarily associated with liver health, such a high number could also, less commonly, indicate severe muscle damage like rhabdomyolysis, or even a recent myocardial infarction, although other markers are more specific for those conditions today.

Further investigation would typically involve a comprehensive liver function panel, including Alanine Aminotransferase (ALT) to assess the AST/ALT ratio, along with tests for specific viral hepatitis markers, and possibly an abdominal ultrasound to visualize liver structure.

Your doctor will also meticulously review your medication history, including over-the-counter drugs and supplements, and alcohol intake. While an AST value of 344 U/L is certainly alarming, identifying the underlying cause promptly often leads to effective treatment and resolution of the acute injury, which can prevent long-term complications.

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 344 against a general adult target. What 344 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) 344 U/L

An elevated Aspartate Aminotransferase (AST) 344 U/L can sometimes be a signpost, hinting at conditions that might not have obvious symptoms yet. This particular marker is an enzyme found in various tissues throughout the body, including the liver, heart, skeletal muscles, and kidneys.

When cells in these tissues are damaged or inflamed, they can release AST into the bloodstream, leading to an elevated Aspartate Aminotransferase (AST) 344 U/L reading. It’s important to remember that a single elevated test result doesn’t provide a complete picture, but it does encourage further investigation to pinpoint the source of the elevation.

The American Association for the Study of Liver Diseases (AASLD) emphasizes the importance of a comprehensive evaluation when such markers are notably high.

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 344 U/L, signals substantial ongoing hepatocellular injury. This magnitude of elevation suggests active liver cell death, which if unchecked, can lead to rapid fibrosis progression and potentially cirrhosis within months, especially if the underlying cause is acute viral hepatitis or severe drug-induced liver injury.

Furthermore, such high AST can indicate a risk of hepatic encephalopathy due to the liver's impaired detoxification capacity, manifesting as confusion or personality changes. There's also an increased susceptibility to infections and potentially acute liver failure in individuals with pre-existing comorbidities.

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.
  • May suggest conditions affecting the liver.
  • Could point to issues with heart or muscle tissue.

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 344 U/L Mean?

When your Aspartate Aminotransferase (AST) level is 344 U/L, it suggests that there's an increase in the release of this enzyme into your bloodstream. Aspartate Aminotransferase is a type of protein that helps in specific chemical reactions inside cells.

It's a crucial component for how cells produce energy. While a moderate increase in AST, like Aspartate Aminotransferase (AST) 344 U/L, often points toward conditions affecting the liver, it can also originate from other areas of the body where AST is abundant.

For instance, muscle injury from intense exercise, certain heart conditions, or even damage to red blood cells can sometimes lead to an elevated AST. Healthcare providers consider the Aspartate Aminotransferase (AST) 344 U/L reading alongside other blood tests, your overall health history, and any symptoms you might be experiencing.

This holistic view helps to narrow down the potential causes and form a clearer understanding of what your body is trying to communicate through this particular level. It's a key piece of the puzzle that often guides further diagnostic steps, revealing insights into your internal health landscape.

A serum AST of 344 U/L most plausibly stems from acute viral hepatitis (like Hepatitis A or B during the initial phase) or a significant drug-induced liver injury from medications such as acetaminophen overdose or certain antibiotics and statins.

Less commonly, this level might be observed in acute alcoholic hepatitis with severe inflammation, or following strenuous physical exertion or intramuscular injections which can transiently elevate AST. While other causes exist, these acute inflammatory or toxic insults are the most common culprits for AST reaching this specific heightened range.

Your AST 344 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.
Upload your blood test, get your real plan back to normal →
The part one number cannot show
Your AST of 344 means different things depending on its companion markers.
Your full panel shows which story is yours.
See what is driving yours →

Lifestyle Changes for Aspartate Aminotransferase (AST) 344 U/L

Addressing an elevated Aspartate Aminotransferase (AST) 344 U/L often involves exploring lifestyle adjustments beyond what you eat. Regular physical activity, managed appropriately, can support overall health, but it’s important to consider its impact on AST levels.

For example, very strenuous exercise can temporarily increase AST levels due to muscle breakdown. The key is finding a balance that supports your well-being without overstressing your body. Managing stress through techniques like mindfulness, meditation, or spending time in nature can also contribute positively to your health, potentially influencing inflammatory processes in the body.

Adequate, quality sleep plays a vital role in cellular repair and regeneration, which is fundamental for maintaining healthy organ function. Avoiding or limiting exposure to certain environmental toxins or occupational hazards can also be a consideration, as some substances are known to affect liver health.

The National Institutes of Health (NIH) frequently highlights the interconnectedness of various lifestyle factors in maintaining physiological balance. Understanding how these non-dietary elements fit into your routine can be an empowering step when considering an Aspartate Aminotransferase (AST) 344 U/L result, helping you take an active role in your health.

Immediate medical evaluation is critical. Schedule an urgent appointment with your primary care physician or seek emergency care, given the very high AST. They will likely order repeat AST and ALT testing within 24-48 hours, along with viral hepatitis serologies and liver function tests (bilirubin, albumin, INR).

A detailed medication and supplement review is essential, and abstinence from alcohol is mandatory. Depending on initial findings, referral to a hepatologist or gastroenterologist specializing in liver disease will be necessary for further investigation and management.

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.

Before you go

Want a nudge when it is time to check aspartate aminotransferase (ast) again?

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

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.
  • Every retest joins itThe line builds itself, so the next version shows what moved.

Sources

Disclaimer: This content is for informational purposes only and is not medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. BloodMarker does not establish a doctor-patient relationship. Terms & Conditions
Upload my test