What causes high MCH and low RDW?

High MCH and low RDW can be caused by many reasons.

If your MCH is in between 27 pg and 32 pg and your RDW is in between 11.6 % and 14 % then you need not worry as these are the normal ranges for MCH and RDW respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Normal range of MCH : 27 - 32 pg

Ideal values of MCH depending on age :

Age	Ideal MCH value
<5 years	27.562
5-10 years	28.135
10-15 years	28.72
15-20 years	29.317
20-25 years	29.927
25-30 years	30.549
30-35 years	31.184
35-40 years	31.833
40-45 years	31.819
45-50 years	31.805
50-55 years	31.792
55-60 years	31.778
60-70 years	31.764
70-80 years	31.751
80-90 years	31.737
90-100 years	31.723
>100 years	31.709

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

If you want your blood test report to be interpreted by MCH specialist, then you can upload your report. Our MCH expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now

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Some examples of conditions that increase or decrease MCH levels include:

• An overactive thyroid gland
• Complications from an infection
• An autoimmune disease
• Thalassemia, an inherited blood disorder
• Liver diseases

If you want your blood test report to be interpreted by MCH specialist, you can upload your report. Our MCH expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now

Normal range of RDW : 11.6 - 14 %

Ideal values of RDW depending on age :

Age	Ideal RDW value
<5 years	11.841
5-10 years	12.087
10-15 years	12.338
15-20 years	12.595
20-25 years	12.857
25-30 years	13.124
30-35 years	13.397
35-40 years	13.676
40-45 years	13.96
45-50 years	13.954
50-55 years	13.948
55-60 years	13.942
60-70 years	13.936
70-80 years	13.93
80-90 years	13.924
90-100 years	13.918
>100 years	13.911

High MCH and low RDW can be caused by a lot of reasons. If you take MCH and RDW blood tests and the results are higher than 32 pg for MCH and lower than 11.6 % for RDW, your physician may recommend more tests to figure out the problem. You might also get these tests if your physician thinks you have some other disease.

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How the MCH and RDW Tests Are Done :

If your doctor wants MCH and RDW tests on you, you may need to go through these tests. During the MCH and RDW blood tests, a pathologist will put a needle into your veins and take out a small quantity of blood. A pathologist is a physician in the medical field who thoroughly studies the causes and effects of disease. Within a few hours you will get your MCH and RDW Test reports by your pathologist.

Medical References

• WebMD – MCH Levels (Mean Corpuscular Hemoglobin) From Blood Test
• Cleveland Clinic – MCH in a Blood Test (Mean Corpuscular Hemoglobin)
• NIH – Red Cell Indices