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Buy Vitamin B12 Injections

Vitamin B12 Injections

Vial of B12
In Stock

Buy Vitamin B12 Injections

Vitamin B12 Injections

Vitamin B12 is an essential nutrient that promotes energy production, brain function, and muscle health. Vitamin B12 deficiency is relatively common, affecting 6% to nearly 20% of adults.
$90 per Month
Benefits of Vitamin B12
  • Better nerve and muscle function
  • Clearer cognitive function
  • Lower risk of anemia
  • Improved mood
  • Supports bone health
What’s Included?
  • Rx Consultation
  • Supplies
  • Support

Vitamin B12
Quality Tested Products
Vitamin B12
Us Based Pharmacies
Vitamin B12
Licensed Physicians
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What is Vitamin B12?

Vitamin B12 injections replenish vitamin B12, an essential nutrient, and mitigate the symptoms of vitamin B12 deficiency, bypassing the complex absorption process that oral supplements entail.
Hand Holding a Vial of B12

Best Uses for Vitamin B12

Better nerve and muscle function

Vitamin B12 and folate are essential for producing methionine and S-adenosylmethionine (SAM). These methylation reactions are required to form the fatty myelin sheath around nerve cells that speeds up nerve conduction. They also play an important role in the production of brain messengers known as neurotransmitters.

Clearer cognitive function

High-dose vitamin B12 supplementation can lower high homocysteine levels in older adults both with and without cognitive impairment. After reviewing 21 clinical trials, researchers concluded that vitamin B supplements may delay cognitive impairment associated with aging. However, vitamin B supplements had no effect on information processing speed, episodic memory, or executive function. More research is needed to understand the relationship between homocysteine levels, vitamin B12 and cognitive function.

Lower risk of anemia

Vitamin B12 is required to produce healthy red blood cells. Vitamin B12 deficiency can result in malformed and large red blood cells, known as megaloblastic anemia. These large red blood cells cannot move efficiently from the bone marrow to the bloodstream, resulting in anemia. Anemia can lead to weakness and fatigue.

Improved mood

Vitamin B12 supplements may improve mood and ease depressive symptoms. In one study, approximately one in every three people with depression had elevated homocysteine levels. Supplementing with vitamin B12 lowers homocysteine levels and may improve mood, particularly in response to stress. In a review of studies, researchers found that while vitamin B12 supplementation did not improve depressive symptoms, low vitamin B12 levels were linked to an increased risk of developing depression.

Supports bone health

Vitamin B12 deficiency can increase bone fracture risk. When 1982 people who follow a vegan diet were tracked for 17.6 years and compared to non-vegetarians, they had a 43% increased risk of fractures, including hip fractures.
What do patients say about Invigor Medical
  • Just N Review

    Just N

    This process was one of the easiest. From the time of purchase to completing the medical forms and receiving a phone call, it was less than an hour. They were easy to understand, knowledgeable, and allowed me time to ask questions. I left the phone call feeling confident about what to expect and the timeframe of events.
  • Joselys P Review

    Joselys P

    My experience was great! They called me and explained everything I needed to know regarding Semaglutide and the whole process. Very comforting experience.
  • Jeremiah S Review

    Jeremiah S

    I have been a patient of Invigor Medical for about 2 years, and I have always received prompt responses from everyone, from salespeople to physicians… I just refilled my medication today, and it took about 5 text messages to get it taken care of. Thank you for helping me grow older without getting old.
  • Annie Review


    I love Invigor Medical! They have the best customer service ever and wonderful products. Highly recommend this company!!!
  • OKC Couple Review

    OKC Couple

    I’ve been a client of Invigor Medical for several years and always have top notch service. They don’t make you feel weird about the products or any questions you might have. I just did another refill, Kristine C. helped my out and everything took just a few minutes and we were all set. Thank you again!!
  • Carl S Review

    Carl S

    Super easy to work with, I received a helpful call a few minutes after submitting my initial request and thry answered all my questions. So far so good!
  • Jeff K Review

    Jeff K

    Brooklyn has been my point of contact and she has been really great to work with! She is responsive, caring, easy to work with, and friendly! Definitely recommend!
  • Mario C Review

    Mario C

    Always super knowledgeable about all their peptides and other offerings. Great customer service as well!
  • Michelle R Review

    Michelle R

    I’ve never ordered medication this way but I’ve been pleasantly surprised with the ease of the process. Brooklyn has been amazing in helping me to navigate ordering and decide which medications I should discuss with the provider.
  • Mark E Review

    Mark E

    I have been working with Invigor Medical for about a year now. Kudos to Aryanna for doing a very good job. She helps me get my order approved, offers options, and my order is correct and shipped out efficiently. I recommend this company.
  • Jonathan M Review

    Jonathan M

    I have been working with Invigor Medical for several months, and find their service to be excellent. Today I was contacted by Courtney, who was checking in to see how things were going. She was very nice and helped me to save money on my semaglutide injections by switching to a 2 month subscription. Thank you Courtney! You were so kind and helpful.
  • Jen R Review

    Jen R

    **UPDATE** IT’S THE REAL THING! Semaglutide order arrived within a week. All supplies included with very thorough instructions. Extremely noticeable reduction in appetite. Will DEFINITELY buy from Invigor again!
  • Afeistyone Review


    A fantastic organization! Great customer support from the beginning to the end of the process. However, I must highlight one in particular who went above and beyond Brooklyn. She kept me informed and in the know of my order. I appreciate the extra mile at every stage. I would recommend them unreservedly.
  • Guido M Review

    Guido M

    Everyone I have dealt with here has been helpful, respectful, and hard working. Particularly treatment specialist Melissa – making sure that I get the assistance I need. It has been a very pleasant experience.
  • Murrell S Review

    Murrell S

    They were nice, helpful and fast. The service rep that helped me was awesome!
  • Lacey H Review

    Lacey H

    Katie was super helpful and knowledgeable when placing a refill order. She processed the order within a few mins via the chat option. Very easy! Have ordered several times and it’s always been super easy and very reliable! Sign up for the auto-fill, it makes things super nice!!
  • Steven C Review

    Steven C

    Exceptional service from this company. I had a few questions so I contacted Them via web chat on their website. Right after I ended the chat I was very surprised to have received a call from Aryanna, one of the staff there. She was sweet, polite, informative and was able to answer every concern I had ended the chat with. So far my experience here has been excellent.
  • Florenda B Review

    Florenda B

    I highly recommend this business! They are reliable, honest, and operate with integrity. Their products are consistently outstanding, and they constantly exceed my expectations, every time I purchase from them! So, it should go without saying that their customer service is second to none!
    What’s Included
    • Rx Consultation
      Discuss your treatment plan with one of our licensed practitioners.
    • Supplies
      All medications and supplies included, no hidden fees.
    • Support
      Our well-trained medical staff are ready to answer your questions.
    Vial of B12 White Background

    How to use Vitamin B12

    Inject Vitamin B12 intramuscularly as directed.

    Common Side Effects
    • Allergic reactions
    • Upset stomach
    • Diarrhea
    • Decreased appetite
    • Pain at the injection site
    • Headache
    • Dizziness
    • Itchiness
    B12 On A Yoga Mat
    Vitamin B12
    This test detects endotoxins (remnants of bacterial cell walls that can cause serious health problems) in pharmaceutical products. It helps ensure that medications are not contaminated by bacteria. Endotoxin limits are set based on how the medication is administered.
    pH Test
    This test measures the percent hydrogen (pH) or acidity or alkalinity of a product. The pH can affect the medication’s stability, solubility, and potency. To ensure the validity of the endotoxin test, the pH must be kept in a specified range.
    Sterility Test
    This test confirms that all sterile compounded medications are free from microbial contamination, including bacteria and fungi. Sterility testing reduces the risk of infections from taking medications.
    Potency Test
    This test measures the strength or the concentration of an active pharmaceutical ingredient (API) over time. It can be used in conjunction with stability testing to ensure that the medication will retain its potency until its beyond-use date.
    Invigor’s Commitment to Quality Medication
    Our partner compounding pharmacies work with a registered and certified third-party lab to run quality control checks for every lot of compounded medications prescribed and delivered to our patients. These labs follow guidelines to ensure compounded medication safety and quality.
    Invigor’s Commitment to Quality Medication
    Our partner compounding pharmacies work with a registered and certified third-party lab to run quality control checks for every lot of compounded medications prescribed and delivered to our patients. These labs follow guidelines to ensure compounded medication safety and quality.
    Vitamin B12
    This test detects endotoxins in pharmaceutical products to prevent contamination by bacterial remnants, ensuring medication safety. Limits are set based on administration methods.
    pH Test
    This test assesses a product’s pH, which impacts stability, solubility, and potency. Maintaining pH within a specified range ensures the validity of the endotoxin test.
    Sterility Test
    This test ensures sterile compounded medications are free from microbial contamination, minimizing infection risks.
    Potency Test
    This test assesses the potency of an active pharmaceutical ingredient (API) over time, ensuring medication retains potency until its expiration date.
    Get started with Vitamin B12

    Choose a treatment plan
    Most of our patients know that what they need is just a few clicks away. Clients start by choosing a treatment plan that best suits their needs.
    Fill Out Medical Forms
    After choosing a treatment plan, it only takes a moment to fill out a medical history form so our physicians have all of the info needed to get you going.
    Provider Review
    Your order will be evaluated by a practitioner licensed in the state you reside. If they have any further questions they will contact you via email, messaging, or phone.
    Prescription Fulfilment
    One of our partnered, U.S. based, registered pharmacies will dispense and ship the medication straight to your door.
    Frequently Asked Questions about Vitamin B12
    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.

    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.

    What is Vitamin B12?

    Vitamin B12 Deficiency is Common

    Vitamin B12, also known as Methylcobalamin, 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.