Your Vitamin B12 Level

What Causes Abnormal Vitamin B12 Levels?

Abnormal vitamin B12 levels can have various causes, ranging in severity from 'serious' to 'generally fatal'.  Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.

Diagnose your symptoms now!
  • check your overall health status
  • let The Analyst™ find what's wrong
  • learn what you should be doing right now

Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms.  In order to diagnose abnormal vitamin B12 levels, we could:

  • Research the topic
  • Find a doctor with the time
  • Use a diagnostic computer system.
The process is the same, whichever method is used.

Step 1: List all Possible Causes

We begin by identifying the disease conditions which have "abnormal vitamin B12 levels" as a symptom.  Here are eight of many possibilities (more below):
  • Kidney Cancer
  • Cirrhosis Of The Liver
  • Polycythemia Vera
  • Lung Cancer
  • CML Leukemia
  • Prostate Cancer
  • Stomach Cancer
  • Vitamin B12 Need

Step 2: Build a Symptom Checklist

We then identify all possible symptoms and risk factors of each possible cause, and check the ones that apply:
macrocytic red cells
kidney cancer
copper supplementation
regular unexplained vomiting
meal-related pain for over a month
somewhat elevated basophil count
tongue soreness
meals worsen epigastric pain
not supplementing B12
occasional confusion/disorientation
history of prostate cancer
reduced sense of taste
... and more than 60 others

Step 3: Rule Out or Confirm each Possible Cause

A differential diagnosis of your symptoms and risk factors finds the likely cause of abnormal vitamin B12 levels:
Cause Probability Status
Cirrhosis Of The Liver 94% Confirm
Lung Cancer 23% Unlikely
Stomach Cancer 22% Unlikely
Kidney Cancer 0% Ruled out
Vitamin B12 Need 0% Ruled out
Prostate Cancer 0% Ruled out
Polycythemia Vera 0% Ruled out
CML Leukemia 0% Ruled out
* This is a simple example to illustrate the process

Arriving at a Correct Diagnosis

The Analyst™ is our online diagnosis tool that learns all about you through a straightforward process of multi-level questioning, providing diagnosis at the end.

If you indicate having had recent lab tests, The Analyst™ will ask further questions including this one:
Vitamin B12 (cobalamin). Unit: pg/mL [pmol/L]
Possible responses:
→ Don't know
→ Confirmed deficiency in the past
→ Under 200 [150] (low)
→ 200-950 [150-700] (normal)
→ Over 950 [700] (elevated)
Based on your response to this question, which may indicate history of B12 deficiency, B12 deficiency, normal B12 levels or elevated B12 levels, The Analyst™ will consider possibilities such as:
Vitamin B12 Requirement

A urine MMA test is recommended for properly diagnosing B12 deficiency due to the possible lack of sensitivity of serum B12 tests.  A normal or high B12 level makes B12 deficiency less likely, but does not rule it out.

Concerned or curious about your health?  Try The Analyst™
Symptom Entry
Symptom Entry
Diagnosis
Diagnosis
Suggestions
Suggestions
LifeMeter
LifeMeter®
Full Explanations
Explanations
Optional Doctor Review
Review (optional)

Related Questions

Nutrient-Related Lab Values
We use cookies for traffic analysis, advertising, and to provide the best user experience