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Vitamin B12

Buy B12 Injections

Vitamin B12 - Treatment Plan Image

Vitamin B12

Buy B12 Injections

Vitamin B12 plays a key role in energy, brain function, and muscle health. This powerful vitamin offers increased vitality, clearer cognition, improved mood, and restful sleep. Discover the life-changing benefits of B12 today!

What’s Included

When you buy Vitamin B12 injections from Invigor Medical, you can rest assured that you are working with a licensed, experienced, and dedicated doctor and receiving Vitamin B12 from a U.S.-based, FDA 503B-registered pharmacy.
Rx Consultation

Discuss your treatment plan with one of our licensed practitioners.


All medications and supplies included, no hidden fees.


Our well-trained medical staff are ready to answer your questions. 

Per 4 Weeks

Benefits of Vitamin B12

Vitamin B12, an essential vitamin, is not produced by the body and must be obtained through diet or supplementation. Vitamin B12 is crucial for producing red blood cells and proper nerve, muscle, and brain function. Consuming a vegan or vegetarian diet, having stomach or gastrointestinal disorders, or being older than age 60 increases the risk of vitamin B12 deficiency. Restoring Vitamin B12 with Vitamin B12 injections can have the following benefits:

  • Vitamin B12
    Better Nerve and Muscle Function
  • Vitamin B12
    Clearer Cognitive Functioning
  • Vitamin B12
    Lower Risk of Anemia
  • Vitamin B12
    Improved Mood
  • Vitamin B12
    More Energy
  • Vitamin B12
    More Restful Sleep
buy Vitamin B12
buy Vitamin B12
What users are saying about Vitamin B12

Do I Need Vitamin B12?


You may be experiencing a combination of the following symptoms
  • Weight gain
  • Fatigue
  • Depressed mood
  • Ringing in the ears
  • Numbness or tingling
  • Muscle weakness
  • Unsteady gait
  • Dizziness
  • Anxiety
  • Irritability
  • Difficulty sleeping
If you are experiencing any of the symptoms listed above, you may be eligible for Vitamin B12. After you fill out the forms to get started, an Invigor Medical specialist will contact you.

Vitamin B12 FAQs

The Medication
What do Vitamin B12 injections do for you?

Vitamin B12 injections can replenish Vitamin B12 in people who are deficient. Low Vitamin B12 levels are more common in people over the age of 65, those with gastrointestinal problems, strict vegetarians, and those who have had bariatric surgery. There is some evidence that supplemental Vitamin B12 can improve mood even in people without a true Vitamin B12 deficiency.

Restoring Vitamin B12 levels can provide the following benefits:

  • Improved memory
  • Improved mood
  • More energy
  • Decrease in weakness and fatigue
  • Improve the health of skin, hair, and nails
  • Improved sleep
  • May improve ringing in the ears
How long does a Vitamin B12 injection last?

The effects of a Vitamin B12 injection can be felt within about 48 to 72 hours. People who are not deficient in Vitamin B12 are not likely to notice any benefits. How fast Vitamin B12 is metabolized in the body will also vary by person but is expected to be less than one week.

What are the symptoms of low Vitamin B12?

Vitamin B12 affects numerous bodily functions, including the production of red blood cells and brain functions. Symptoms of low Vitamin B12 include:

  • Fatigue
  • Muscle weakness
  • Nausea
  • Trouble with balance
  • Irritability
  • Weight loss
  • Numbness or tingling in the hands and feet
  • Diarrhea
  • Smooth and tender tongue
  • Fast heart rate
Who is high risk for Vitamin B12 deficiency?

Risk factors for Vitamin B12 deficiency include:

  • Using antacids long-term
  • Having pernicious anemia
  • Having inflammatory bowel disease
  • Having autoimmune disorders such as type 1 diabetes
  • Taking high doses of folic acid
  • Having lower stomach acid levels due to aging
  • Taking metformin for more than four months
  • Being vegan or vegetarian
  • Using alcohol excessively
  • Having a family history of Vitamin B12 deficiency
  • Having part of your stomach or intestines removed
  • Being older


How soon do you feel less tired after a Vitamin B12 injections?

If you are Vitamin B12-deficient, a Vitamin B12 injection is expected to have effects within 48 to 72 hours. Depending on your metabolism and the severity of your Vitamin B12 deficiency, you may notice improvements in your energy levels in as little as two to three days, but it may take weeks of treatment to feel the full effects.

Why do Vitamin B12 levels drop?

Vitamin B12 deficiency and insufficiency are relatively common because:

  • Some medications slow Vitamin B12 absorption or increase Vitamin B12 use.
  • Certain medication conditions make it harder for the body to absorb Vitamin B12
  • Of limited dietary intake, especially in people who are vegan or vegetarian.
What prevents Vitamin B12 absorption?

Unlike other vitamins, Vitamin B12 requires intrinsic factor, a substance produced in the stomach to aid in Vitamin B12 absorption. In those with low stomach acidity (a condition associated with aging), a lack of intrinsic factor can lead to a lack of Vitamin B12.

Inflammatory bowel disease and other bowel conditions, having surgery on the stomach or intestines, or even the bacterial flora composition in your intestines can affect Vitamin B12 absorption.

Can you have too much Vitamin B12?

Vitamin B12 is a water-soluble vitamin. Since excess Vitamin B12 can be excreted in the urine, even high doses are generally considered to be safe. There is no set “tolerable upper limit” for Vitamin B12 because it has such a low potential for toxicity and the body does not store excess amounts. The recommended daily intake (RDI) of Vitamin B12 is 2.4 mcg for both men and women.

Invigor Medical
Do I need a prescription before I buy from Invigor Medical?

No, Invigor Medical employs doctors licensed in all 50 states, and a medical consultation is included with each medical service. Each patient will receive a valid prescription, which is sent to the pharmacy to be filled.

How long does it take to get my medication?

Once you have enrolled for medical services with Invigor Medical, it usually takes 7-14 business days before items arrive at your home. This process includes an online medical consultation, prescription approval, the medication getting filled at the pharmacy, and the medication being sent to your home.

More Questions?
Fill out the form below, and one of our treatment specialists will contact you.

What is Vitamin B12?

Vitamin B12 Deficiency is Common

Vitamin B12 is a water-soluble vitamin that is naturally found in some foods and added to others. Vitamin B12 supplements are available in both oral and injectable forms. Vitamin B12 deficiency is fairly common, affecting 6% to 23% of people under age 60 and nearly 20% of those over age 60. Malnutrition, vegetarian or vegan diet, gastritis, and alcohol misuse are contributing factors.

Vitamin B12 is Important in Carbohydrate and Lipid Metabolism and Red Blood Cell Function

Vitamin B12 is essential for growth, cellular reproduction, blood formation, neurological function, DNA, and protein synthesis, among other things. Vitamin B12 also aids in red blood cell production and metabolizing carbohydrates. Efficiently metabolizing carbohydrates and producing red blood cells that optimally carry oxygen to hardworking muscle and brain tissue boosts your overall energy and mental clarity.

Multiple Medical Conditions Are Associated with B12 Deficiency

Obesity, insulin resistance, dyslipidemia, and cardiovascular disease have all been linked to low Vitamin B12 levels. Vitamin 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.

How Does Vitamin B12 Work?

Absorbing Vitamin B12 is a Multi-Step Process

Vitamin B12 is an essential vitamin because it is obtained entirely through diet. Vitamin B12 is found in animal products and fortified foods in the diet, but it can also be taken as a supplement.

When bound to the food we eat, Vitamin B12 is released from protein by hydrochloric acid and an enzyme called gastric protease. When Vitamin B12 is added to food or taken as a supplement, it is already in a free form and does not need to be released. Once Vitamin B12 is free, it combines with intrinsic factor in the stomach.

Intrinsic factor is a glycoprotein secreted by specialized cells lining the stomach called parietal cells. The combined intrinsic factor Vitamin B12 is absorbed into the body in the ileum, which is the most distal part of the small intestine. Vitamin B12 then binds to transcobalamin, and the complex moves through the bloodstream. The complex is absorbed into cells. Approximately two years’ worth of Vitamin B12 is stored in the liver.

Included with the Plan

Vitamin B12

Free Doctor Consult

The consultation with the doctor is always included when you sign up for Vitamin B12.
Vitamin B12

Medical Support

Our friendly staff are knowledgeable and available to answer any questions.
Vitamin B12

Supplies Included

When you purchase Vitamin B12, all required supplies are always included.
Vitamin B12

No Doctors Office

Skip the in-person doctor’s visit, consult remotely, and get Vitamin B12 shipped directly to you.
Vitamin B12

Licensed Pharmacies

Our U.S. based, FDA-registered pharmacies provide quality meds tested for purity and potency.
Vitamin B12

No Hidden Fees

Our licensed doctors cover all 50 states and are very well versed with the medications we offer.

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