Education only · provider review required
B12 injections · Essential if you are deficient, pointless if you are not
The most-given wellness shot, with a clear line between medicine and marketing.
Medically reviewed by Bernard Garcia, MD
What it is
Vitamin B12 injections are an established treatment for B12 deficiency — including pernicious anaemia, malabsorption, post-bariatric surgery, some vegans, and people on long-term metformin or acid suppressants. As an "energy shot" for people with normal levels, controlled evidence shows no benefit.
How it works
Injection bypasses absorption problems in the gut. Deficiency is confirmed by blood test (B12, and often MMA or homocysteine). Excess is excreted; the injection itself is low-risk, which is why it is so widely sold.
Research status
| Research area | Status |
|---|---|
| B12 deficiency / pernicious anaemia | Established treatment |
| Post-bariatric, metformin, vegan diets | Commonly indicated after testing |
| "Energy" in people with normal levels | No benefit in controlled studies |
| Safety | Low risk |
Status reflects published research context only and is not a statement of safety, efficacy, or suitability for any person.
Is it legal?
Injectable B12 is an approved prescription product for deficiency; wellness use is off-label. This is a general note, not medical advice.
Frequently asked questions
Should I get a B12 shot?
Only a blood test answers that. A provider can order one after intake.
Oral or injection?
High-dose oral works for many; injection is for malabsorption or severe deficiency. A provider decides.
Does Vitrex offer shots?
No.
Next step
Next step: a 3-minute confidential intake, reviewed by a licensed provider. No treatment is promised or implied.
Free · about 10 minutes · reviewed by a licensed physician
General education · Not medical advice · Provider approval required