Is Vitamin B12 143 low, normal or dangerous? What does Vitamin B12 level 143 mean?

📅 Medical Review Date: November 21, 2025

Your Vitamin B12 level of 143 is a Low Vitamin B12 level.

Low Vitamin B12 levels may indicate underlying health problems. The normal range is typically between 211 pg/mL and 911 pg/mL. 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 Vitamin B12 range for men is :211 - 911 pg/mL

Ideal values of Vitamin B12 depending on age (male) :

Age	Ideal Vitamin B12 value
<5 years	214.017
5-10 years	217.077
10-15 years	220.181
15-20 years	223.33
20-25 years	226.524
25-30 years	229.763
30-35 years	233.049
35-40 years	236.382
40-45 years	239.762
45-50 years	243.191
50-55 years	246.669
55-60 years	250.196
60-70 years	253.774
70-80 years	257.403
80-90 years	261.084
90-100 years	264.818
>100 years	268.605

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

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Some examples of conditions that increase or decrease Vitamin B12 levels include:

• Crohn disease
• Ulcerative colitis
• Celiac disease
• Reduced stomach acid production
• Pancreatic insufficiency

Receive world-class medical opinion about your low Vitamin B12 levels over email.Upload blood test report now

Normal range of Vitamin B12 found among women :211-911 pg/mL

Ideal values of Vitamin B12 depending on age (female) :

Age	Ideal Vitamin B12 value
<5 years	214.108
5-10 years	217.262
10-15 years	220.462
15-20 years	223.709
20-25 years	227.004
25-30 years	230.348
30-35 years	233.741
35-40 years	237.184
40-45 years	240.677
45-50 years	244.222
50-55 years	247.819
55-60 years	251.469
60-70 years	255.173
70-80 years	258.931
80-90 years	262.745
90-100 years	266.615
>100 years	270.542

If you take a Vitamin B12 blood test and the results are not in the normal range (211-911 pg/mL), 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 Vitamin B12 Test Is Done :

When your doctor orders a Vitamin B12 test, it involves a straightforward blood draw to measure your Vitamin B12 levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your Vitamin B12 test results are usually available within a few hours.

Medical References

• WebMD – Vitamin B12 Blood Test: Uses, Normal Range, and Results
• NIH – Vitamin B12 - Health Professional Fact Sheet
• MedlinePlus – Vitamin B12 level