Skip to content

Lowest price ever on Microdosing Tirzepatide | $239/month $159/month

Our science

B12 Injection

The essential vitamin behind cellular energy. B12 helps power red blood cell production, nerve function, and the metabolic pathways that get harder to sustain with age.

Good to know

B12 sits behind three jobs in every cell: building red blood cells, protecting nerves, and recycling homocysteine in metabolism.9

Those jobs share one thread, energy: how well your cells turn food into fuel, with B12 as a required part of that process.1

What B12 may support

Because B12 depends on digestive absorption, maintaining healthy levels can get harder with age. That’s why how B12 is delivered can matter as much as how much you take.
Injection bypasses the digestive system, removing one of the biggest variables in how much B12 the body can absorb.
B12 supports red blood cell formation and healthy nerve function.9
Levels often fall with age as the body absorbs less from food.9
Available as clinician-guided B12 Injection and B12/MIC Injection.

How B12 Injections work

B12 is less like fuel and more like the key that lets your cells use it. Your body needs it to keep essential reactions involved in energy, blood, and nerve function moving.

B12 helps enzymes turn food into fuel and keep nerve signaling on track.1

Explore B12

About 1 in 8 U.S. adults have low or marginal B12 status.8

1 in 8
Prescription products require an online evaluation with a licensed medical professional who will determine if a prescription is appropriate. Products are compounded by a licensed pharmacy. The FDA has not reviewed or approved compounded products for any use for safety, efficacy, or quality.

Vitamin B12 Injection longevity benefits

What B12 Injections and B12/MIC Injections may support, with the evidence behind each.

What we still don’t know

We believe in full transparency. Here’s what B12 research doesn’t yet answer.

We take B12 research seriously

With 65,000+ B12 and B12/MIC users, we’ve built one of the largest real-world datasets in longevity care. Our Stanford PhD-led Research Team uses that evidence alongside published research to keep learning how B12 fits into longevity care.
B12 is included in our Top 10 finalist protocol in the prestigious XPRIZE Healthspan competition.
Protocols informed by real-world outcomes across tens of thousands of B12 and B12/MIC users.
Our in-house clinicians turn that research into individualized care, with ongoing monitoring and dosage adjustments.
Read our Research

Don’t know where to start?

Take our quick assessment to get personalized recommendations based on your goals and where you are in your longevity journey.

Frequently asked questions

01 What's the difference between the B12 shot and B12/MIC?

The B12 injection focuses on energy, nerve, and metabolic support. B12/MIC adds methionine, inositol, and choline, lipotropic nutrients often chosen alongside a weight-management routine. A clinician helps match the option to your goals.

02 Why choose an injection over an oral supplement?

Oral B12 depends on gut absorption, which can decline with age and certain conditions. An injection bypasses that step. Your clinician recommends the format and cadence that fit your levels and goals.

03 Is it possible to get too much B12?

B12 is water-soluble, so the body excretes what it doesn’t use, and the NIH has not set an upper intake limit.8 A clinician still reviews your health history first.

04 How will I know if it's working?

Most people track self-reported changes in energy, focus, and recovery over several weeks, alongside standard bloodwork a clinician already follows. Individual response varies with your starting B12 status.

05 Who is B12 for, and who is it not for?

It’s generally suited to adults supporting energy, focus, or metabolic health, especially those with low or marginal B12. It isn’t a treatment for a diagnosed condition, and isn’t appropriate during pregnancy or breastfeeding without clinician guidance.

06 Will the B12/MIC blend make me lose weight on its own?

No. The lipotropic nutrients in B12/MIC are meant to complement a healthy diet and activity, not replace them, and the human evidence is limited. Results vary from person to person.