What causes high TIBC and low RDW SD?

High TIBC and low RDW SD can be caused by many reasons.

If your TIBC is in between 250 mcg/dL and 450 mcg/dL and your RDW SD is in between 39 fL and 46 fL then you need not worry as these are the normal ranges for TIBC and RDW SD 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 TIBC : 250 - 450 mcg/dL

Ideal values of TIBC depending on age :

Age	Ideal TIBC value
<5 years	254.425
5-10 years	258.928
10-15 years	263.511
15-20 years	268.175
20-25 years	272.922
25-30 years	277.753
30-35 years	282.669
35-40 years	287.672
40-45 years	292.764
45-50 years	297.946
50-55 years	303.22
55-60 years	308.587
60-70 years	314.049
70-80 years	319.608
80-90 years	325.265
90-100 years	331.022
>100 years	336.881

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

If you want your blood test report to be interpreted by TIBC specialist, then you can upload your report. Our TIBC 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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TIBC treatment - Click to read 10 GOLDEN ARTICLES on Anemia

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

• Iron deficiency
• Iron poisoning
• Inflammation
• Chronic liver disease
• Hemochromatosis

If you want your blood test report to be interpreted by TIBC specialist, you can upload your report. Our TIBC 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 SD : 39 - 46 fL

Ideal values of RDW SD depending on age :

Age	Ideal RDW SD value
<5 years	39.69
5-10 years	40.393
10-15 years	41.108
15-20 years	41.836
20-25 years	42.576
25-30 years	43.33
30-35 years	44.097
35-40 years	44.878
40-45 years	45.672
45-50 years	45.657
50-55 years	45.643
55-60 years	45.629
60-70 years	45.615
70-80 years	45.6
80-90 years	45.586
90-100 years	45.572
>100 years	45.558

High TIBC and low RDW SD can be caused by a lot of reasons. If you take TIBC and RDW SD blood tests and the results are higher than 450 mcg/dL for TIBC and lower than 39 fL for RDW SD, 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 TIBC and RDW SD Tests Are Done :

If your doctor wants TIBC and RDW SD tests on you, you may need to go through these tests. During the TIBC and RDW SD 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 TIBC and RDW SD Test reports by your pathologist.

Medical References

• Cleveland Clinic – TIBC (Total Iron-Binding Capacity) Test
• WebMD – What to Know About Total Iron-Binding Capacity (TIBC) Test
• MedlinePlus – Total iron binding capacity