Is Vitamin B12 191 low, normal or dangerous? What does Vitamin B12 level 191 mean?

📅 Medical Review Date: January 19, 2026

Your Vitamin B12 level of 191 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	215.03
5-10 years	219.137
10-15 years	223.323
15-20 years	227.588
20-25 years	231.935
25-30 years	236.365
30-35 years	240.88
35-40 years	245.481
40-45 years	250.17
45-50 years	254.948
50-55 years	259.818
55-60 years	264.781
60-70 years	269.838
70-80 years	274.992
80-90 years	280.244
90-100 years	285.597
>100 years	291.052

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

Get Advice via Email : Send us your blood test report, and our Vitamin B12 experts will review it. You'll receive a detailed analysis and personalized treatment guidance via email within 12 hours. If you have additional blood test results besides Vitamin B12, please include those too—an accurate diagnosis often requires a full view of all abnormalities. Upload blood test report now

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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	215.151
5-10 years	219.384
10-15 years	223.7
15-20 years	228.101
20-25 years	232.588
25-30 years	237.164
30-35 years	241.83
35-40 years	246.588
40-45 years	251.439
45-50 years	256.386
50-55 years	261.43
55-60 years	266.573
60-70 years	271.817
70-80 years	277.164
80-90 years	282.617
90-100 years	288.177
>100 years	293.846

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