Is LDH 997 high, normal or dangerous? What does Lactate dehydrogenase level 997 mean?

📅 Medical Review Date: September 30, 2025

Your LDH level of 997 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	109.97
5-10 years	120.934
10-15 years	132.991
15-20 years	146.25
20-25 years	160.831
25-30 years	176.866
30-35 years	175.108
35-40 years	173.367
40-45 years	171.644
45-50 years	188.757
50-55 years	186.881
55-60 years	185.023
60-70 years	183.184
70-80 years	181.363
80-90 years	179.56
90-100 years	177.775
>100 years	176.008

*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	110.269
5-10 years	121.593
10-15 years	134.08
15-20 years	147.849
20-25 years	163.032
25-30 years	179.774
30-35 years	177.878
35-40 years	176.002
40-45 years	174.146
45-50 years	172.309
50-55 years	170.492
55-60 years	188
60-70 years	186.018
70-80 years	184.056
80-90 years	182.115
90-100 years	180.195
>100 years	178.294

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