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B12 injection vial – buy B12 shots online from Invigor Medical
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B12 Injections

Restore Vitamin B12 Levels

  • Replenishes essential B12 levels
  • Supports mood, energy, and focus
  • Ideal for those with absorption issues
B12 Injections
$90 per Month
Includes doctor consult and supplies
Doctor Consultation
Prescribed by U.S. Doctors, 100% online
Medical Delivery Vehicle
Delivered discreetly to your door
RX with a Heart
Trusted by 35,000+ patients nationwide

Quick B12 Replenishment With B12 Injections

B12 Injections bypass the gut and go straight into your system, correcting low levels fast. Better B12 can mean more energy, clearer thinking, and improved mood, especially if absorption is an issue. A simple clinic directed shot gets it done without guesswork.
B12 Injections Medication in Hand

Why Choose Invigor?

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No hidden fees or confusing pricing
Direct access to dedicated treatment specialists
Fast, transparent prescription and consultation process
Flexible, no-commitment treatment plans
Testimonials

Why Thousands Trust Invigor Medical

★★★★★
"My energy came back fast once B12 was corrected."
Erica
Verified Customers
★★★★★
"Clearer thinking and no more mid morning fog."
Joel
Verified Customers
★★★★★
"Mood lifted and I am not dragging by noon."
Lily
Verified Customers
★★★★★
"Simple shot, big payoff in daily energy."
Nate
Verified Customers
★★★★★
"Focus is sharper and I feel noticeably better."
Olga
Verified Customers
★★★★★
"Huge difference once absorption was not an issue."
Reid
Verified Customers
★★★★★
"Energy steady all week after each injection."
Sara
Verified Customers
★★★★★
"Brain fog lifted and I am back on track."
Tom
Verified Customers
★★★★★
"Quick fix that made my days feel normal again."
Uma
Verified Customers
★★★★★
"I just feel alive again; simple as that."
Vince
Verified Customers

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.

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What to Expect

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What's Included when you buy B12 Injections

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.

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.
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Step 1
Enroll Now
Choose a treatment plan, and fill out the medical forms to get started.
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Step 2
Provider Review
One of our doctors will contact you to talk about your health goals.
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Step 3
Receive Treatment
The pharmacy will ship your prescribed items directly to you.
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Step 4
Achieve 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.
Passed
Endotoxicity
Date
01-01-01
Lab
Bio Pharma
This test checks for endotoxins (bacterial remnants that can cause health issues) in pharmaceutical products, ensuring they are free from contamination. Endotoxin limits depend on how the medication is given.
Passed
pH Test
Date
01-01-01
Lab
Bio Pharma
This test measures the pH (acidity or alkalinity) of a product, which impacts its stability, solubility, and potency. The pH must stay within a specific range to ensure the endotoxin test is valid.
Passed
Sterility Test
Date
01-01-01
Lab
Bio Pharma
This test ensures that sterile compounded medications are free from microbial contamination, including bacteria and fungi, reducing the risk of infections.
Passed
Potency Test
Date
01-01-01
Lab
Bio Pharma
This test measures the strength or concentration of an active pharmaceutical ingredient (API) over time, ensuring the medication maintains its potency until its beyond-use date when used with stability testing.
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Medically Reviewed By:
Andrew Hamilton, DO
Invigor Medical LegitScript Certification

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Medication Disclaimer

Important Safety Information

*Prescription medications available only if prescribed by the healthcare provider after an online consultation. This is a compounded medication.