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What is Eligen B12?

The first and only oral treatment for
B12 deficiency

Eligen B12 is for people with clinically low B12 levels. It is a once-daily oral treatment that normalizes B12 levels without inconvenient injections.

Prescription strength B12 without the needle

People with dangerously low B12 levels don’t need injections to return B12 levels to normal. Eligen B12 has a special technology that makes sure your body gets the B12 it needs by taking a pill just once a day.

Data show that taking Eligen B12 daily gives better results than monthly injections.

Why can’t I just use a B12 supplement?

In many people with low B12 levels, vitamin B12 supplements aren’t enough. If your doctor has recommended other B12 therapies, it could be because your digestive system doesn’t absorb the B12 very well through your diet or oral supplements.

If you’re someone who doesn’t absorb vitamin B12 well, over-the-counter vitamin B12 pills are not enough to bring your B12 up to a normal level.

Intended for U.S. Residents Only
4 Becker Farm Road, Suite 103, Roseland NJ 07068
April 2016 ELB034


Eligen B12™ is indicated for the dietary management of patients who have a diagnosed vitamin B12 deficiency that cannot be managed by a modification of the normal diet alone. This deficiency can be caused by a range of conditions in which there is an impaired capacity to absorb vitamin B12.

Important Safety Information

You should not take Eligen B12™ if you are allergic to vitamin B12, cobalt, or any ingredient of Eligen B12™.

You should not take Eligen B12™ if you have Leber’s disease, which your doctor may refer to as hereditary optic nerve atrophy. Cyanocobalamin can lead to optic nerve damage (and possibly blindness) in people with Leber’s disease.

Before using Eligen B12™, tell your doctor or pharmacist if you:

  • Are or may be allergic to cyanocobalamin (vitamin B12) or cobalt
  • Have an iron or folic acid deficiency
  • Have kidney or liver disease
  • Have low potassium blood levels (hypokalemia) or gout
  • Have a blood disorder called polycythemia vera
  • Have an eye disease called hereditary optic nerve atrophy (Leber’s disease)
  • Are receiving any medication or treatment that affects bone marrow
  • Have other vitamin/mineral deficiencies (especially folic acid and iron)

Get emergency medical help if you have any of these signs of a serious reaction: muscle cramps, weakness or irregular heartbeat, hives, difficulty breathing, swelling of your face, lips, tongue or throat.

Call your doctor at once if you have a serious side effect, such as feeling short of breath, even with mild exertion, sudden vision changes or slurred speech.

Less serious side effects may include diarrhea, itching or rash.

Before using Eligen B12™ tell your doctor or pharmacist all of the medicines you are taking, especially methotrexate, pyrimethamine, any antibiotics, and any vitamins.

You are encouraged to report negative side effects of medical foods to the FDA. Visit or call 1-800-FDA-1088.