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Unbranded methylcobalamin B12 injectable vial on a cobalt Rebody editorial surface.

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Methylcobalamin B12 · Cellular energy

When low B12 is behind the drag.

Low B12 can show up as fatigue, fog, weakness, or a day that ends on the couch. Methylcobalamin is the active B12 form; diet, medications, and prior labs help show whether it is the missing piece.

Active formInjection5 mg/mL strength
First month with offer$89/mo$44.50/first mo.50% off
Start your online visit
FSA & HSA eligibleUse eligible benefit funds
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Active methylcobalamin, 5 mg/mL
10 mL vial, 60-day supply
Once-weekly injection
Discreet shipping if prescribed

Charged today — ships if prescribed. Individual results vary.

Rx only
History checked
Follow-up access

Why this matters

Low B12 is measurable—and correctable.

Deficiency can affect red blood cell production and nervous-system function. Start with labs and the reason behind the fatigue; keep the weekly injection details beside the product and price.

Start with the reason

Poor sleep, training, diet pattern, and medication history can all change why someone is looking at B12.

A direct prescription injection

Methylcobalamin B12 comes as an injection with the active ingredient and dose on the label.

Three molecules, three different jobs

B12 targets B12 status. NAD+ and glutathione work through different biology.

Labs, diet, and meds matter

The online visit asks about diet history, prior labs, medications, and fatigue patterns before a plan.

Zoomed-in science

See where B12 does the work.

Methylcobalamin sits inside everyday systems that support red blood cell production, methylation, and nervous system function.

A zoomed-in 3D B12 explainer showing B12 connected to red blood cells, folate, and methylation.
B12Active methylcobalaminRed cellsProduction and maturation supportMethylationDaily biochemical work

01

Methylcobalamin B12 energy basics.

Methylcobalamin is the form your cells use directly — no conversion step, no filler blend.

Active B12At-home injection5 mg/mL strength
Unbranded clear vial on a cobalt track with refracted red and cobalt light.

02

Red blood cell support.

B12 supports red blood cell formation and nervous system function. The visit asks about diet, medications, fatigue pattern, and prior labs before a provider decides whether B12 fits.

Translucent red blood cell hoops moving across a cobalt track lane.

03

Fatigue has a pattern.

Energy is not one product. Sleep debt, iron, diet, and meds can all wear the same fatigue costume.

SleepDietMedicationsTraining
Sunlit recovery scene with activewear, towel fibers, water bottle, watch, glass caustics, and cobalt track.

04

Review first, then B12.

A provider reviews your history before prescribing. If prescribed, fulfillment follows the plan and pharmacy standards.

Your online visitProvider reviewB12 plan, if appropriateFulfillment
Sunlit recovery portrait crop on a cobalt track after activity.

Compare

B12 by the numbers.

Compare ingredient, format, strength, vial size, and supply.

Methylcobalamin B12
Injection
NAD+
Injection
Glutathione
Injection
Active ingredient
Methylcobalamin
Nicotinamide adenine dinucleotide
Glutathione
Format
Injection
Injection
Injection
Strength
5 mg/mL
—
—
Vial
10 mL
—
—
What it targets
B12 status, diet, medications
Cellular energy and repair
Antioxidant and recovery goals
Typical supply
~60 days
~30 days
~30 days
What is reviewed

Methylcobalamin B12 with diet and medication history behind it.

The product details, medications, diet pattern, prior labs, and refill rhythm all matter before anything ships.

Methylcobalamin B12 product vial.
Active
Methylcobalamin B12
Format
Injection
Strength
5 mg/mL
Vial
10 mL
Typical supply
~60 days, based on prescribed dose and frequency
Review
Diet, medications, history, prior labs, and goals
How care works

From intake to doorstep in four steps.

01
02
03
04
Start your online visit
Share your diet history, medications, prior labs, fatigue pattern, and goals.
Provider review
A licensed provider reviews your information before any prescription decision.
Prescription
If appropriate, your prescription is sent for fulfillment.
Ongoing care
Follow-up access helps adjust your plan as needed.
Safety first

You must be eligible.

Medication and diet history matter
Certain medications, supplements, diet patterns, and health conditions can affect how B12 fits into your care.
Not right for everyone
Your provider reviews history, contraindications, allergies, pregnancy status, and other safety factors.
Prescription required
A licensed provider must approve treatment before anything ships.
Your privacy is protected
Your information is encrypted and handled with care.

Ready when you are

Find out if low B12 is behind the fatigue.

A licensed provider reviews your diet, meds, and any prior labs — then prescribes active B12 if your history points that way.

Start your online visit
FAQ

Good to know.

B12 results

The difference shows up after work, not on the label.

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.

More energy after workVerified customer · Better afternoon energy after low B12A few weeks

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.

Daycare pickup is easierVerified customer · Better afternoon energy after low B124 weeks

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.