B12 Injections Product Image
Buy Vitamin B12 Injections

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

Quality Tested Products
Us Based Pharmacies
Licensed Physicians

What is B12 Injections?

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 the B12 Injections product

Best Uses for B12 Injections

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.
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!!
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
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.
I love Invigor Medical! They have the best customer service ever and wonderful products. Highly recommend this company!!!
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!
Mario C
Always super knowledgeable about all their peptides and other offerings. Great customer service as well!
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
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.
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!
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.
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
They were nice, helpful and fast. The service rep that helped me was awesome!
Vial of B12 White Background
What's Included with B12 Injections
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.
B12 On A Yoga Mat

How to use B12 Injections

Inject Vitamin B12 intramuscularly as directed.

B12 Injections Side Effects
  • Allergic reactions
  • Upset stomach
  • Diarrhea
  • Decreased appetite
  • Pain at the injection site
  • Headache
  • Dizziness
  • Itchiness

Frequently Asked Questions about B12 Injections

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

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.

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

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


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.

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.

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.

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.

How to Get Started

Most of our patients know that what they need is just a few clicks away.
Enroll Online
Choose a treatment plan, and fill out the medical forms to get started.
Consult with a Doctor
One of our doctors will contact you to talk about your health goals.
Receive Your Items
The pharmacy will ship your prescribed items directly to you.
See Results
Track your results and watch your health and overall wellness improve.

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.
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.
5226 Outlet Dr, Paso, WA 99301
© 2024 Invigor Medical