Vitamin B12 Deficiency Quiz
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What is Vitamin B12 Deficiency?
Vitamin B12 deficiency anemia is a lack of vitamin B12 that leads to insufficient healthy red blood cells. Vitamin B12 is necessary for producing red blood cells, which transport oxygen in the body. It can result from inadequate B12 in the diet or an inability to absorb B12 in the small intestine, also known as pernicious anemia.
Typical Symptoms of Vitamin B12 Deficiency
- Wheezing or whistling sounds when breathing
- Whole body pain
- Unable to, or have difficulty feeling pain
- Recent changes in mental state
- Dizziness
- Tingling or pricking numbness in the legs even when keeping still
- Breathing is harder when lying down, improves when sitting up
- Numbness anywhere from the knees to the ankles
Diagnostic Questions for Vitamin B12 Deficiency
Your doctor may ask these questions to check for this disease:
- Do you experience wheezing or whistling sounds when breathing?
- Do you have pain all over your body?
- Do you have trouble feeling pain?
- Recently, are you more confused than before?
- Do you feel dizzy?
Treatment of Vitamin B12 Deficiency
Treatment includes dietary modifications or vitamin B12 supplements in the form of oral medication or injections.
Reviewed By:
Scott Nass, MD, MPA, FAAFP, AAHIVS (Primary Care)
Dr. Nass received dual medical degrees from the David Geffen School of Medicine at UCLA and Charles R. Drew University in Medicine and Science. He completed Family Medicine residency at Ventura County Medical Center with subsequent fellowships at Ventura, University of North Carolina-Chapel Hill, George Washington University, and University of California-Irvine. He holds faculty appointments at Keck School of Medicine of USC, Loma Linda University School of Medicine, and Western University of Health Sciences.
Yoshinori Abe, MD (Internal Medicine)
Dr. Abe graduated from The University of Tokyo School of Medicine in 2015. He completed his residency at the Tokyo Metropolitan Health and Longevity Medical Center. He co-founded Ubie, Inc. in May 2017, where he currently serves as CEO & product owner at Ubie. Since December 2019, he has been a member of the Special Committee for Activation of Research in Emergency AI of the Japanese Association for Acute Medicine. | | Dr. Abe has been elected in the 2020 Forbes 30 Under 30 Asia Healthcare & Science category.
Content updated on Feb 19, 2025
Following the Medical Content Editorial Policy
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People with similar symptoms also use Ubie's symptom checker to find possible causes
- Whistling when I breathe
- My whole body aches and I feel weak
- Respiratory wheeze
- Loud breathing
- Body aches and chills
- Stridor
- Dizziness
- Joint pain and stiffness all over body
- Change in mental status
- Whole body aches no fever
- Dizziness multiple times
- My whole body hurts
- Appears dazed
- Whole body pain
- Off-balance like floating
See full list
Symptoms Related to Vitamin B12 Deficiency
Diseases Related to Vitamin B12 Deficiency
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Link to full study:
https://www.medrxiv.org/content/10.1101/2024.08.29.24312810v1References
Green R, Miller JW (2021). Vitamin B12 deficiency. Vitamins and hormones.
https://pubmed.ncbi.nlm.nih.gov/35337628/Shipton MJ, Thachil J (2015). Vitamin B12 deficiency - A 21st century perspective. Clinical medicine (London, England).
https://pubmed.ncbi.nlm.nih.gov/25824066/Green R, Allen LH, Bjørke-Monsen AL, Brito A, Guéant JL, Miller JW, Molloy AM, Nexo E, Stabler S, Toh BH, Ueland PM, Yajnik C (2017). Vitamin B12 deficiency. Nature reviews. Disease primers.
https://pubmed.ncbi.nlm.nih.gov/28660890/