Is ALT SGPT 402 high, normal or dangerous? What does Alanine aminotransferase level 402 mean?

📅 Medical Review Date: September 30, 2025

Your ALT SGPT level of 402 is a High ALT SGPT level.

An ALT SGPT level of 402 U/L usually means liver cells are inflamed or damaged. It suggests liver injury. High levels of ALT SGPT can cause extreme tiredness, nausea, vomiting, right-sided abdominal pain, loss of appetite, dark urine, and jaundice. This can be caused by viral hepatitis, non-alcoholic fatty liver disease, alcohol-related liver disease, or medication side effects. Further tests are often needed to identify the cause and guide appropriate treatment.

High ALT SGPT levels may indicate underlying health problems. The normal range is typically between 21 U/L and 72 U/L. If your levels are outside this range, it's important to speak with a healthcare provider. Consulting a doctor is recommended to determine the cause and appropriate next steps.

The normal ALT SGPT range for men is :21 - 72 U/L

Ideal values of ALT SGPT depending on age (male) :

Age	Ideal ALT SGPT value
<5 years	21.844
5-10 years	22.722
10-15 years	23.635
15-20 years	24.585
20-25 years	25.573
25-30 years	26.601
30-35 years	27.67
35-40 years	28.782
40-45 years	29.939
45-50 years	31.143
50-55 years	32.395
55-60 years	33.697
60-70 years	35.052
70-80 years	36.461
80-90 years	37.927
90-100 years	39.452
>100 years	41.038

*Ideal values are calculated based on our database of patient records

Misdiagnosis is more common than people think—and the consequences can be serious. Delayed treatment, unnecessary medication, or worse. If you want a second opinion on your blood work, one option is to upload it to a site like wholebodyprotocol.com, where world-class doctors review your results. They charge a small fee—around $90 (though you'll want to check the latest price as it fluctuates)—and email you a detailed report. With over 12 million people affected by misdiagnosis every year, that little bit of extra peace of mind can go a long way.

Some examples of conditions that increase or decrease ALT SGPT levels include:

• Alcohol abuse
• Blockage of the bile ducts.
• Kidney damage.
• Damage to red blood cells
• Heart attack or heart failure

Normal range of ALT SGPT found among women :21-72 U/L

Ideal values of ALT SGPT depending on age (female) :

Age	Ideal ALT SGPT value
<5 years	21.87
5-10 years	22.776
10-15 years	23.719
15-20 years	24.701
20-25 years	25.724
25-30 years	26.789
30-35 years	27.898
35-40 years	29.053
40-45 years	30.256
45-50 years	31.509
50-55 years	32.814
55-60 years	34.173
60-70 years	35.588
70-80 years	37.062
80-90 years	38.597
90-100 years	40.195
>100 years	41.859

If you take a ALT SGPT blood test and the results are not in the normal range (21-72 U/L), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the ALT SGPT Test Is Done :

When your doctor orders a ALT SGPT test, it involves a straightforward blood draw to measure your ALT SGPT levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your ALT SGPT test results are usually available within a few hours.

Medical References

• Mayo Clinic – Alanine aminotransferase (ALT) blood test
• MedlinePlus – ALT Blood Test
• WebMD – Alanine Aminotransferase (ALT) Test: What Does It Mean?
• Cleveland Clinic – Alanine Transaminase (ALT) Blood Test: What It Is, Procedure & Results

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