B12Rx
A hand holding the B12Rx self-injector with a prefilled syringe loaded

Prefilled B12 injections.No vial.

Each syringe arrives sealed and filled. Up to 4,000 mcg of B12. Load it and press.

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From $13.99 / shot

  • In business since 2014
  • Strongest prescription B12
  • Made in the USA
  • No synthetic cyano B12
  • LegitScript-certified

Prefilled injections, self-administered at home.

Each syringe arrives sealed and prefilled. Load it into the self-injector, place it on your thigh, and press.

  1. 1

    The pouch

    Open the pouch

    Each syringe arrives sealed and prefilled.

    A sealed B12Rx pouch
  2. 2

    The injector

    Load the injector

    Load the syringe into the self-injector.

    A prefilled syringe loaded into the B12Rx self-injector
  3. 3

    The shot

    Press and done

    Place it on your thigh and press. The injection is done in seconds.

    The B12Rx self-injector pressed against the thigh
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Our Formulas

Powerful, Convenient & Affordable

  • Most complete

    Dual-MAX

    $29.99 / shot

    • Total B12: 4,000 mcg
    • Methyl: 3,000 mcg
    • Hydroxo: 1,000 mcg
    • How it acts: Fast and long-acting
    • Lipotropics: 50% more
    • Inositol: 75,000 mcg
    • Choline: 75,000 mcg
    • Chromium: 200 mcg
    • Auto-refill shipping: Included
    Learn more

  • Lipo-Energy

    $19.99 / shot

    • Total B12: 3,000 mcg
    • Methyl: 3,000 mcg
    • How it acts: Fast-acting
    • Lipotropics: Included
    • Inositol: 50,000 mcg
    • Choline: 50,000 mcg
    • Chromium: 100 mcg
    • Auto-refill shipping: Included
    Learn more

  • Methyl-Renew

    $13.99 / shot

    • Total B12: 2,000 mcg
    • Methyl: 2,000 mcg
    • How it acts: Fast-acting
    • Auto-refill shipping: Included
    Learn more

What makes B12Rx different

Prefilled prescription shots, ready to load.

Oral supplements, non-prescription B12, and cyano drawn from a vial are a different product.

  • Prefilled shots. No vials.

    Sealed syringes. Nothing to draw or measure.

  • No synthetic cyano

    Methyl and hydroxo.

  • Painless self-injector

    Load the syringe, place it, and press.

  • Fast and long acting

    Most people feel it within hours to a day. A shot lasts several days.

The injector and the syringe.

They sit together in the case. The syringe arrives filled and sealed. Load it into the injector and press.

Open B12Rx case with the self-injector and a prefilled syringe seated in foam

Pre-filled Shots vs Vials

Online B12 vials ask you to do the pharmacy’s job: swab a stopper, draw a dose, and keep using the same bottle. A B12Rx syringe arrives already filled.

Online B12 vials

  • The dose

    A vial is labeled per milliliter. The shot is whatever line you draw, bubbles and all.

  • After the first needle

    The first puncture opens the bottle. The doses left share that opened vial, commonly for 28 days.

  • What you keep using

    The usual multi-dose cyano vial sold for home injection is preserved with benzyl alcohol so the stopper can be entered again.

  • Light and leftovers

    An opened vial sits between shots, and the last doses are the oldest.

  • The rubber stopper

    Swab the stopper, inject air, invert, withdraw, and tap out bubbles. The needle can core rubber into the liquid.

  • Who is accountable

    A listing is not a prescription, and it is not a pharmacy release in your name.

Prefilled

B12Rx prefilled syringes

A sealed B12Rx pouch holding one prefilled syringe

  • The dose

    Each syringe is filled and sealed to its dose. There is nothing to measure.

  • After the first needle

    One syringe, one shot, sealed in its pouch until you use it.

  • What you keep using

    Methyl. A single dose, not a bottle you go back to.

  • Light and leftovers

    Each dose stays in its pouch until that injection. There is no leftover vial.

  • The rubber stopper

    Open the pouch, click the syringe into the injector, and press.

  • Who is accountable

    A US-licensed physician reviews the order. A US pharmacy prepares the syringes for that prescription.

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What B12 does for your body

Energy, weight loss, circulation, liver, sleep, mood, and nerve function.

  • Boost energy

    B12 increases circulation to give you more energy, without caffeine or other stimulants.

  • Lose weight faster

    B12 plus lipotropics help burn fat.

  • Detoxify liver

    B12 helps the liver process fats, detoxify, and support metabolism.

  • Better sleep

    B12 helps produce melatonin, which regulates sleep cycles, light sensitivity, and night vision.

  • Improved mood

    A cofactor for neurotransmitters like serotonin and dopamine that regulate mood.

  • Improve circulation

    B12 supports red blood cell production and helps your body use oxygen.

  • Support nerves

    B12 supports healthy nerve function and plays a role in DNA synthesis.

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Lipotropics

Inositol, choline, and chromium in the same shot as B12. Lipo-Energy includes them. Dual-MAX has 50% more.

Fat metabolism

Lipotropics help the body process and burn fat.

Liver function

They support the liver while it processes fats and clears toxins.

Energy

Paired with B12, they support energy without adding caffeine.

Weight management

B12 plus lipotropics is how these formulas help you lose weight faster.

Made and shipped from the USA

Third-party tested

Every batch independently verified for potency and purity.

Pharmacy compounded

Prepared through a licensed pharmacy fulfillment workflow.

Physician reviewed

Every prescription signed by a US-licensed physician.

FAQ

Common questions

Yes. Orders placed online are connected to licensed medical professionals for review. A prescription is issued only when the reviewer determines it is appropriate.