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Vitamin B12
Vitamin B12
Vitamin B12 is a water-soluble vitamin that has the potential to boost energy levels, reduce fatigue, and speed up metabolism, especially in those who are Vitamin B12 deficient. Studies suggest that B12 also plays a role in fat metabolism. Low B12 levels may be linked to obesity.
Patients can buy Vitamin B12 with an included prescription consultation with a doctor.
For Use By
Delivery Method

Can I Buy Vitamin B12?

Patients can buy Vitamin B12 with an included prescription consultation. Consult with the doctor via an online Telehealth visit. The pharmacy sends the medication directly to the patient after approval.

Do we offer Vitamin B12 as part of a treatment plan?
Increased Energy
Improved energy production
Assist with Weight Loss
Increased metabolic rate

How Does Vitamin B12 Work?

Vitamin B12 Can Help You Lose Weight and Keep it Off

Obesity, insulin resistance, dyslipidemia, and cardiovascular disease have all been linked to low Vitamin B12 levels, according to researchers. B12 is involved in the regulation of DNA coding for proteins (epigenetics) as well as many metabolic processes in the cell. There is mounting evidence that Vitamin B12-DNA interactions regulate lipid metabolism and play a role in fat deposition.

Crucial Vitamin for Optimal Function

Vitamin B12 is an essential vitamin because it is obtained entirely through diet. B12 is found in animal products and fortified foods in the diet, but it can also be taken as a supplement. Vitamin B12 is important in the formation of red blood cells and regulation of gene activity. It is also used to produce myelin, the fatty insulator that surrounds nerve cells and speeds up nerve signaling throughout the body.

Benefits of Vitamin B12

Vitamin B12 supplementation reverses the symptoms of B12 deficiency, which may lead to:
  • Vitamin B12
    Improved memory
  • Vitamin B12
    Improved mood
  • Vitamin B12
    More energy
  • Vitamin B12
    Decreased weakness and fatigue
  • Vitamin B12
    Improved skin, hair, and nail health
  • Vitamin B12
    Reduced homocysteine levels
  • Vitamin B12
    Improved sleep
  • Vitamin B12
    Possible reduced ringing in ears

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Drug Details


What is Vitamin B12 used for?

Anyone with Vitamin B12 deficiency, including those:
  • Who use antacids long-term
  • With pernicious anemia
  • With inflammatory bowel disease
  • Who are taking high doses of folic acid
  • With lower stomach acid levels due to aging
  • Who have been taking metformin for more than four months
  • Who are vegan or vegetarian
  • Who use alcohol excessively


You should avoid Vitamin B12 if you are/have:

You should not take B12 injections if you are allergic to cyanocobalamin or cobalt or if you have an inherited form of vision loss called Leber's disease. Cyanocobalamin can lead to optic nerve damage, which causes blindness in people with Leber's disease. Tell your doctor if you have:
  • Eye problems or Leber's disease
  • Kidney or liver disease
  • Iron or folic acid deficiency
  • Any type of infection or are receiving any medication or treatment that affects bone marrow
  • Colchicine and heavy alcohol intake may interact with vitamin B12 injections.
  • Additionally, people with the blood disorder polycythemia vera may have very serious side effects from B12 (cyanocobalamin) injections, including chest pain, shortness of breath, weakness on one side, sudden vision loss, or slurred speech.
Vitamin B12 Side Effects

What are the side effects of Vitamin B12?

Side effects due to an allergic reaction to Vitamin B12 include hives; itching; swelling of the face, lips, tongue, or throat; and difficulty breathing. Get emergency help if you experience any of these symptoms. Additional side effects from B12 injections may include:
Common Vitamin B12 Side Effects
  • Abdominal or stomach pain
  • Bleeding from the gums or nose
  • Blue lips or fingernails, chest pain, cough, coughing up pink, frothy sputum
  • Decreased urine output
  • Difficulty breathing
  • Difficulty swallowing
  • Dilated neck veins
  • Dizziness
  • Fatigue
  • Eye pain
  • Fast heartbeat
  • Headache
  • Increased sweating
  • Irregular breathing or heartbeat
  • Puffiness or swelling of the face, fingers, feet, or lower legs
  • Tightness in the chest
  • Weight gain
  • Nausea, vomiting, diarrhea, loss of appetite, or rashes
  • Low potassium levels - symptoms of low potassium include muscle cramps, weakness, and irregular heartbeat.
Rare Vitamin B12 Side Effects
  • None

Vitamin B12 Dosage Information

Vitamin B12 Dosage & Frequency

Typical Vitamin B12 Dosage & Frequency
  • 1 ml
  • Daily



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Many people have heard of B12 injections but may not be sure what they are for or why you need them. One of the biggest hallmarks of aging is often a decrease in energy levels and a corresponding ...