Is Vitamin B12 309 normal, high or low? What does Vitamin B12 level 309 mean?

📅 Medical Review Date: January 18, 2026

Your Vitamin B12 level of 309 is a Normal Vitamin B12 level.

Normal 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	217.52
5-10 years	224.241
10-15 years	231.17
15-20 years	238.313
20-25 years	245.677
25-30 years	253.268
30-35 years	261.094
35-40 years	269.162
40-45 years	277.479
45-50 years	286.053
50-55 years	294.892
55-60 years	304.004
60-70 years	313.398
70-80 years	323.082
80-90 years	333.065
90-100 years	343.357
>100 years	353.967

*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 normal 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	217.715
5-10 years	224.644
10-15 years	231.794
15-20 years	239.171
20-25 years	246.783
25-30 years	254.637
30-35 years	262.741
35-40 years	271.103
40-45 years	279.731
45-50 years	288.634
50-55 years	297.82
55-60 years	307.299
60-70 years	317.079
70-80 years	327.171
80-90 years	337.584
90-100 years	348.328
>100 years	359.414

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