Is LDH 306 high, normal or dangerous? What does Lactate dehydrogenase level 306 mean?

📅 Medical Review Date: November 12, 2025

Your LDH level of 306 is a High LDH level.

An LDH level of 306 U/L usually means tissue damage has occurred somewhere in the body. It suggests cell injury or destruction. High levels of LDH can cause fatigue, muscle pain, shortness of breath, dark urine, fever, and jaundice depending on which tissue is affected. This can be caused by heart attack, liver disease, kidney disease, muscle injury, or certain cancers. Further tests are often needed to identify the cause and guide appropriate treatment.

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	103.06
5-10 years	106.214
10-15 years	109.464
15-20 years	112.814
20-25 years	116.266
25-30 years	119.824
30-35 years	123.491
35-40 years	127.27
40-45 years	131.164
45-50 years	135.178
50-55 years	139.314
55-60 years	143.577
60-70 years	147.97
70-80 years	152.498
80-90 years	157.164
90-100 years	161.973
>100 years	166.929

*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	103.152
5-10 years	106.403
10-15 years	109.757
15-20 years	113.216
20-25 years	116.784
25-30 years	120.465
30-35 years	124.262
35-40 years	128.178
40-45 years	132.218
45-50 years	136.385
50-55 years	140.684
55-60 years	145.118
60-70 years	149.692
70-80 years	154.41
80-90 years	159.277
90-100 years	164.297
>100 years	169.475

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