Is LDH 400 high, normal or dangerous? What does Lactate dehydrogenase level 400 mean?

📅 Medical Review Date: April 5, 2026

Your LDH level of 400 is a High LDH level.

High LDH levels may indicate underlying health problems. The normal range is typically between 100 U/L and 190 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 LDH range for men is :100 - 190 U/L

Ideal values of LDH depending on age (male) :

Age	Ideal LDH value
<5 years	104
5-10 years	108.16
10-15 years	112.486
15-20 years	116.985
20-25 years	121.664
25-30 years	126.531
30-35 years	131.592
35-40 years	136.856
40-45 years	142.33
45-50 years	148.023
50-55 years	153.944
55-60 years	160.102
60-70 years	166.506
70-80 years	173.166
80-90 years	180.093
90-100 years	187.297
>100 years	186.997

*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 LDH levels include:

• Acute kidney disease
• Acute liver disease
• Sepsis
• Infections such as infectious mononucleosis
• Pancreatitis

Normal range of LDH found among women :100-190 U/L

Ideal values of LDH depending on age (female) :

Age	Ideal LDH value
<5 years	104.12
5-10 years	108.41
10-15 years	112.876
15-20 years	117.526
20-25 years	122.368
25-30 years	127.41
30-35 years	132.659
35-40 years	138.125
40-45 years	143.816
45-50 years	149.741
50-55 years	155.91
55-60 years	162.333
60-70 years	169.021
70-80 years	175.985
80-90 years	183.236
90-100 years	182.925
>100 years	182.615

If you take a LDH blood test and the results are not in the normal range (100-190 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 LDH Test Is Done :

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

Medical References

• MedlinePlus – Lactate Dehydrogenase (LDH) Test
• Cleveland Clinic – LDH (Lactate Dehydrogenase) Test: What It Is & Results
• MedlinePlus – LDH isoenzyme blood test