More energy after work
“My labs showed low B12 and the doctor recommended weekly shots. After a few weeks I have more energy after work and am not going directly to the couch every day. Rebody included everything I needed with the first shipment.”
Methylcobalamin B12Active B12, 5 mg/mL injection
$66.75/mofirst 2 months
Start my visitActive formMethylcobalamin, not cyano
Skips the gutInjected, not swallowed
5 mg/mLIn a 10 mL vial
Your B12 tablet has to survive four checkpoints.
An injection has none. Prescription methylcobalamin B12 goes straight into the tissue, so stomach acid, intrinsic factor, gut health, and your medication list stop deciding how much of the dose counts.
- Methylcobalamin is an active form of B12, ready to use
- Injection bypasses the digestive absorption chain
- 5 mg/mL in a 10 mL vial, about 60 days
$66.75 a month for your first 2 months, about $2.23 a day.
Running again.
Verified B12 customer
First 2 months$66.75/mo
Start my visit The questions people actually ask
Four answers, with the offer beside every one.
Read as much or as little as you want. The plan, the price, and the way in stay next to you the whole way down.
The absorption chain
Why does a tablet lose so much on the way in?
- Swallow
A tablet starts in the stomach, not the bloodstream.
- Stomach acid
Acid and pepsin have to free B12 from the food or the tablet matrix.
- Intrinsic factor
A stomach protein has to bind the B12 for it to be carried onward.
- The ileum
The last stretch of small intestine has to absorb the bound complex.
- Bloodstream
Only what survives all four steps ever reaches your cells.
The injectionStraight to the tissue
The dose is placed under the skin. It never enters the chain above, so not one of those four checkpoints gets a say in how much of it lands.
Absorption steps described in the NIH Office of Dietary Supplements Vitamin B12 Fact Sheet for Health Professionals.
Two forms, one label
Methylcobalamin or cyanocobalamin?
- What it is
- A metabolically active form of vitamin B12
- A synthetic form that carries a cyanide group
- Conversion needed
- None. It is already in an active form
- Yes. The body has to convert it before use
- Where you find it
- Rebody's prescription injection, 5 mg/mL
- Most over-the-counter B12 tablets and drops
- How it reaches you
- Injected into the tissue, so absorption is not the gate
- Swallowed, then run through the full absorption chain
- Who sets the dose
- A licensed provider, from your history and prior results
- Whatever the bottle on the shelf prints
What B12 does all day
Three jobs your body cannot skip.
Your body cannot make B12. Every one of these jobs waits on what you take in, and the first one you feel is energy.
- It runs the energy line
B12 is a cofactor in the reactions that convert food into usable cellular energy. Short on B12, that line slows and the fatigue is real, not imagined.
- It builds red blood cells
Normal red blood cell formation and DNA synthesis both depend on B12. Those cells carry the oxygen that everything from a staircase to a long ride runs on.
- It protects your nerves
B12 supports the myelin around nerve cells and normal neurological function, which is the difference between clear thinking and fog.
Roles described in the NIH Office of Dietary Supplements Vitamin B12 Fact Sheet for Health Professionals.
Where it is made
Who compounds the vial, and to whose prescription?
Strive Pharmacy, a licensed 503A pharmacy
Your vial is compounded in the United States against a prescription written for you, which is why the label carries your name, your active, and your strength. A shelf bottle answers to none of that.
- Form
- Methylcobalamin
- Strength
- 5 mg/mL
- Vial
- 10 mL
- Supply
- About 60 days
B12 results
The difference shows up after work, not on the label.
Daycare pickup is easier
“My B12 was low and I felt terrible every afternoon by the time I picked up my daughter. Four weeks into the shots, I am getting through work and daycare pickup without crashing on the couch. My Rebody doctor explained the lab results clearly, and the shipment included all the supplies.”
Running again
“I eat mostly plant based, so low B12 was not a surprise. What surprised me was how much better I felt after starting the injections. Seven weeks in, I am running before work a few times a week instead of turning around after the first mile.”
How Rebody works
From question to first dose.
- 01
Tell us about your afternoons
A few minutes online about your fatigue, diet, medications, health history, and any prior B12 result.
- 02
A licensed provider reads it
A U.S. provider sets your dose and your directions. No waiting room and no referral.
- 03
A licensed pharmacy fills it
A U.S. compounding pharmacy prepares your 10 mL vial and your injection supplies.
- 04
Two months land on your doorstep
Vial, supplies, and your directions ship free in discreet packaging.
How B12 works
The science questions people ask.
Do I need a blood test first?
Serum B12 is the common first test, and methylmalonic acid is a more sensitive confirmatory marker when a serum result is borderline. Share any prior result in your visit. Your provider decides what is needed in your case.
Will B12 give me energy if my level is already normal?
Extra B12 is not a general stimulant when your B12 status is already adequate. Low B12 can cause hematologic and neurologic problems, and fatigue is a useful signal in context, but fatigue alone does not identify a shortfall. Your level, your diet, your medications, and your absorption decide it, which is what the provider review is for.
Do I need a prescription?
Yes. A licensed U.S. provider reviews your online health visit, and a licensed U.S. compounding pharmacy fills and ships the medication when it is prescribed.
Safety and prescribing
Important safety information.
Tell your provider about every medication and supplement you take, your allergies, any prior B12 result, and your complete health history. Injection-site pain, redness, itching, or swelling can occur.
Seek urgent care for signs of a serious allergic reaction, including trouble breathing, facial swelling, severe dizziness, or fainting. Do not share your vial or your injection supplies with anyone.
Compounded medications are not FDA-approved or evaluated for safety, efficacy, or quality by the FDA. Prescription required. Not available in all states. Results vary.
Methylcobalamin B12 at home
Skip the checkpoints.
Active B12, injected, so stomach acid and intrinsic factor stop deciding how much of your dose counts.
$66.75a month for your first 2 monthsStart my online visit
Billed $133.50 today, then $178 every 2 months. Medication, injection supplies, provider review, and shipping are inside the price.