Vitamin B12 deficiency

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What is vitamin B12 deficiency?

Vitamin B12, a water soluble vitamin, helps in the formation of red blood cells and in the maintenance of the central nervous system. Deficiency is due to inadequate dietary intake or impaired absorption of Vitamin B12 resulting in megaloblastic anemia due to inhibition in red blood cell production.

Common symptoms reported by people with vitamin B12 deficiency

Common symptoms
How bad it is
What people are taking for it

Reports may be affected by other conditions and/or medication side effects. We ask about general symptoms (anxious mood, depressed mood, fatigue, pain, and stress) regardless of condition.
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Treatments taken by people with vitamin B12 deficiency

Treatment name(s)
Type
How many have tried
Tried for
Treatment name(s)

(Vitamin B12 Prescription (cyanocobalamin))
Type
Supplement
How many have tried
64
Tried for
vitamin B12 deficiency (64) fatigue (1)
Treatment name(s)

(Medivitan)
Type
Prescription Drug
How many have tried
46
Tried for
vitamin B12 deficiency (45) fatigue (8)
Treatment name(s)

(Neurontin)
Type
Prescription Drug
How many have tried
14
Tried for
pain (13) depressed mood (1)
Treatment name(s)

(Folic Acid Prescription)
Type
Supplement
How many have tried
13
Tried for
vitamin B12 deficiency (13)
Treatment name(s)

(Ultram)
Type
Prescription Drug
How many have tried
13
Tried for
pain (13)
Treatment name(s)

(Norco)
Type
Prescription Drug
How many have tried
11
Tried for
pain (11)
Treatment name(s)

(Vistaril)
Type
Prescription Drug
How many have tried
10
Tried for
anxious mood (10)
Treatment name(s)

(Abilify)
Type
Prescription Drug
How many have tried
9
Tried for
depressed mood (9)
Treatment name(s)

(Valium)
Type
Prescription Drug
How many have tried
9
Tried for
anxious mood (9)
Treatment name(s)

(Cymbalta)
Type
Prescription Drug
How many have tried
9
Tried for
depressed mood (6) pain (3)

Data from patients with vitamin B12 deficiency, who reported starting treatments within the last 5 years.
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Compare treatments taken by people with vitamin B12 deficiency

Treatment name(s)
Perceived effectiveness
Side effects
Total evaluations
Tried for
Treatment name(s)

(Vitamin B12 Prescription (cyanocobalamin))
Perceived effectiveness
for vitamin B12 deficiency (23 evaluations)
Side effects
diarrhea
Total evaluations
27
Tried for
vitamin B12 deficiency (64) fatigue (1)
Treatment name(s)

(Medivitan)
Perceived effectiveness
for vitamin B12 deficiency (23 evaluations)
Side effects
headaches
Total evaluations
24
Tried for
vitamin B12 deficiency (45) fatigue (8)
Treatment name(s)

(Neurontin)
Perceived effectiveness
for pain (8 evaluations)
Side effects
anxious mood dizziness with hypotension upon standing 6 more
Total evaluations
11
Tried for
pain (13) depressed mood (1)
Treatment name(s)

(Folic Acid Prescription)
Perceived effectiveness
for vitamin B12 deficiency (4 evaluations)
Side effects
Total evaluations
5
Tried for
vitamin B12 deficiency (13)
Treatment name(s)

(Ultram)
Perceived effectiveness
for pain (9 evaluations)
Side effects
nausea brain fog 4 more
Total evaluations
9
Tried for
pain (13)
Treatment name(s)

(Norco)
Perceived effectiveness
for pain (5 evaluations)
Side effects
chronic constipation itching
Total evaluations
5
Tried for
pain (11)
Treatment name(s)

(Vistaril)
Perceived effectiveness
for anxious mood (2 evaluations)
Side effects
excessive daytime sleepiness (somnolence)
Total evaluations
2
Tried for
anxious mood (10)
Treatment name(s)

(Abilify)
Perceived effectiveness
for depressed mood (5 evaluations)
Side effects
anxious mood weight gain
Total evaluations
5
Tried for
depressed mood (9)
Treatment name(s)

(Valium)
Perceived effectiveness
for anxious mood (2 evaluations)
Side effects
agitation tiredness increased
Total evaluations
2
Tried for
anxious mood (9)
Treatment name(s)

(Cymbalta)
Perceived effectiveness
for depressed mood (5 evaluations)
Side effects
dizziness anger 7 more
Total evaluations
9
Tried for
depressed mood (6) pain (3)
  • Major
  • Moderate
  • Slight
  • None
  • Can't tell
  • Severe
  • Moderate
  • Mild
  • None

Data from patients with vitamin B12 deficiency, who reported starting treatments within the last 5 years.
Last updated:

Who has vitamin B12 deficiency on PatientsLikeMe?


Age
Age Proportion # of patients
<20 4
20s 64
30s 157
40s 334
50s 353
60s 175
70+ 49
Age at first symptom
Age at first symptom Proportion # of patients
0-19 years 35
20-29 years 82
30-39 years 126
40-49 years 106
50-59 years 50
60-69 years 10
70+ years 2

Distribution of sex

Sex
Sex Proportion # of patients
Male 152
Female 985

Diagnosis status
Diagnosis status Proportion # of patients
Diagnosed 626
Not Diagnosed 29

These charts show data from vitamin B12 deficiency patients who have completed their condition history
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