What does high RDW and Vitamin B12 mean in blood test?

High RDW and Vitamin B12 can be caused by numerous problems.

High levels of RDW and Vitamin B12 in the blood indicate a variety of health problems. If your blood RDW level is between 11.6 % to 14 % and the Vitamin B12 level is between 211 % to 911 pg/mL, then your body does not have any underlying health problems. But if RDW and Vitamin B12 levels exceed these levels, you should see a doctor immediately.

Normal RDW range : 11.6 - 14 %

Age-wise ideal RDW level in blood:

Age	Ideal RDW value
<5 years	12.243
5-10 years	12.921
10-15 years	13.637
15-20 years	13.595
20-25 years	13.553
25-30 years	13.512
30-35 years	13.471
35-40 years	13.429
40-45 years	13.388
45-50 years	13.347
50-55 years	13.306
55-60 years	13.265
60-70 years	14
70-80 years	13.957
80-90 years	13.914
90-100 years	13.871
>100 years	13.828

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

If you want your blood test report to be interpreted by RDW specialist, then you can upload your report. Our RDW 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 RDW levels include:

• Crohn's disease
• Chronic liver disease
• Thalassemia, an inherited blood disorder
• An iron or vitamin deficiency
• Heart disease

If you want your blood test report to be interpreted by RDW specialist, you can upload your report. Our RDW 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 Vitamin B12 range : 211 - 911 pg/mL

Age-wise ideal Vitamin B12 level in blood:

Age	Ideal Vitamin B12 value
<5 years	222.689
5-10 years	235.026
10-15 years	248.046
15-20 years	261.788
20-25 years	276.291
25-30 years	291.598
30-35 years	307.753
35-40 years	324.803
40-45 years	342.797
45-50 years	361.788
50-55 years	381.831
55-60 years	402.984
60-70 years	425.309
70-80 years	448.871
80-90 years	473.738
90-100 years	499.983
>100 years	527.682

High RDW and Vitamin B12 levels in the blood can cause a number of health problems. Your GP may recommend follow-up tests to get an important picture of your overall health and well-being. If the results are greater than 14 % for RDW and more than 911 pg/mL for Vitamin B12, you may also need some follow-up tests that will help detect the underlying disease early.

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How is a blood test performed in the lab?

Depending on the symptoms you are experiencing, your doctor may order a RDW and Vitamin B12 test. In most hospitals RDW and Vitamin B12 results can be obtained within three to six hours after blood is taken. The blood is usually drawn from a vein on the inside of the elbow or the back of the hand. Drink plenty of water before your appointment. If you experience any symptoms that you are concerned about are out of the ordinary, call your doctor immediately.