One symptom of B12 deficiency is…

  • Insomnia
  • Fatigue
  • Blurred vision
  • Weight gain

Which factor(s) can increase your risk of vitamin B12 deficiency?

  • Alcoholism
  • Following a vegan diet
  • Crohn's disease or celiac disease
  • Age
  • Weight loss surgery
  • All of the above

What happens when you don't get enough B12?

  • Your body can't make enough red blood cells.
  • You're more likely to get a cold or the flu.
  • You get hot flashes.
  • You develop allergies.

If you have extremely low levels of B12 in your body, what could happen?

  • Mental confusion and dementia
  • Severe rages
  • Stomach cancer
  • Liver cancer

Which food has the most vitamin B12?

  • Honey
  • Orange juice
  • Steak
  • Tomatoes

How can you tell if you have a true B12 deficiency?

  • Take an online quiz.
  • Take a urine test at your doctor's office.
  • Take a blood test at your doctor's office.
  • Describe your symptoms to your doctor.

What medications can make it hard for your body to absorb vitamin B12?

  • Some diabetes medications
  • Some antibiotics
  • Antacids
  • Some seizure medications
  • All of the above

How can you treat a B12 deficiency?

  • Get more sunshine
  • Take a vitamin
  • Eat raw vegetables
  • All of the above

Show Sources


      Peter Cade / Stone



      National Heart, Lung and Blood Institute: "What Are the Signs and Symptoms of Pernicious Anemia?"

      Medline Plus: "Anemia - B12 Deficiency."

      Oh, R. American Family Physician, March 1, 2003; vol 67(5): pp 979-986.

      National Heart, Lung and Blood Institute: "What Is Pernicious Anemia?"

      Epocrates Online: "Vitamin B12 Deficiency."

      National Institutes of Health Office of Dietary Supplements: "Dietary Supplement Fact Sheet: Vitamin B12."

      USDA National Nutrient Database for Standard Reference: "Honey."

      National Heart Lung and Blood Institute: "Who is at Risk for Pernicious Anemia?"