Weekly · injection
Methylcobalamin B12
- Active form of B12
- For energy, focus, and nerves
- Weekly at-home injection
Longevity is upkeep, not a promise.
B12 + glutathioneInjection options through Rebody
B12 & glutathione
- Methylcobalamin B12 and glutathione, with the ingredient, format, and price shown up front.
- No anti-aging promises or mystery blends. The ingredient, format, and price are shown up front.
- A weekly injection or a routine you keep at home, reviewed by a licensed US provider before anything ships.
Your protocolFormulation listed
B12 · Glutathione · Both
Dose & price
Set at your visit
Check your eligibility
FSA & HSA eligibleUse eligible benefit funds
Split your payment into interest-free installments with Klarna at checkout.
Free discreet shipping
Licensed US compounding pharmacies
US-licensed providers
Pricing varies by compound and dose. Your provider sets the dose from your visit. See full pricing →
Best for
Adults deciding between active-form B12 for energy and nerves and glutathione for antioxidant support, with the dose and price shown up front instead of hidden inside a proprietary blend.
Two compounds, named
Start with B12, glutathione, or both.
Each does a different job. Take the one that matches what you’re chasing — steadier energy or antioxidant upkeep — or run them together.
Weekly · injection
Glutathione
- The master antioxidant
- For oxidative-stress upkeep
- Weekly at-home injection
B12 or glutathione. Skip the mystery blend.
B12 & glutathione — the ingredient and listed dose
The biology, up close
Two ingredients, two jobs.
“Longevity” gets used to sell almost anything. These two ingredients have specific, well-understood roles — one for energy and nerves, one for antioxidant defense.
Methylcobalamin B12Energy and nerves
B12 is the active-form vitamin your body needs to make red blood cells, run methylation, and keep your nerves insulated. Run low and you feel it as fatigue, brain fog, and tingling — a deficit worth correcting rather than caffeinating over.
GlutathioneAntioxidant defense
Glutathione is your cells' master antioxidant — it neutralizes the oxidative stress that builds up with age, stress, and hard training. Supporting it is about upkeep at the cellular level, not a glow-up gimmick.
Backed by the literature, not big claims
What's actually known.
Master
Glutathione is the cell's master antioxidant
It's the most abundant antioxidant your cells make, central to neutralizing oxidative stress and recycling other antioxidants. Levels tend to fall with age and illness.
Source: Pizzorno 2014 (Integr Med)
Active
Methylcobalamin is the active form of B12
It's the coenzyme form your body uses directly for methylation and nerve maintenance — no conversion step required, unlike cyanocobalamin.
Source: Paul & Brady 2017 (Integr Med)
Corrected
B12 deficiency is common — and reversible
Low B12 shows up as fatigue, brain fog, and tingling, and it's more common with age, plant-based diets, and some medications. Correcting the deficit resolves the symptoms it caused.
B12 or glutathione vs. a mystery blend
RebodyB12 & glutathione
Shelf “longevity” blend
What you actually getThe thing in the vial.
Full formulation listed on the pharmacy label
A proprietary “longevity” or “detox” blend
Form that mattersWhether it's the usable version.
Active methylcobalamin, not cyanocobalamin
Often the cheaper, less-active form
Dose and priceWhether you can see what you're buying.
Listed strength, listed monthly price
Unlisted amounts, marketing math
Who signs offWhether a clinician is involved.
Reviewed by a US-licensed provider
Bought off a shelf or a feed
Refills and questionsWho you talk to when something changes.
Message your care team in one thread
You're on your own
What the upkeep actually feels like.
Steady energy you don't have to caffeinate
Antioxidant defense, at the cellular level
Vitality that keeps you moving as you age
It's easy to get started.
01
Start your online visit
Tell us about your energy, recovery, and any labs from your phone. It takes about five minutes — no appointment needed.
02
A provider reviews your fit
A licensed provider checks your history and medications, confirms B12, glutathione, or both are a good candidate, and sets the dose.
03
Delivered to your door
If prescribed, your protocol ships discreetly with everything you need. Message your care team about refills, timing, and dose changes anytime.
B12 & glutathione FAQs
Contact support →What's the difference between B12 and glutathione?
They do different jobs. Methylcobalamin B12 is the active form of vitamin B12 — your body uses it to make red blood cells, run methylation, and maintain nerves, so correcting a deficiency lifts fatigue and brain fog. Glutathione is your cells' master antioxidant, central to neutralizing the oxidative stress that builds up with age and stress. Some people take one, some take both.
Is this an anti-aging treatment?
No, and we won't sell it as one. Longevity peptides and antioxidants attract big claims; we'd rather say what's actually known. B12 corrects a real, measurable deficiency. Glutathione supports your antioxidant system. Both list the dispensed formulation and prescribed dose — not a promise to turn back the clock.
Why methylcobalamin instead of regular B12?
Methylcobalamin is the active, ready-to-use form of B12. Cyanocobalamin — the cheaper form in most shelf supplements — has to be converted by your body first. Starting with the active form skips that step.
When will I notice a change?
If you're correcting a B12 deficiency, energy and mental clarity can lift within a few weeks. Glutathione's antioxidant support is more of a steady, behind-the-scenes upkeep than a felt jolt. Individual response varies.
Do I need a prescription?
Yes. Both are prescription-only through Rebody. After your online visit, a licensed provider reviews your health profile and decides whether they're a good fit. If approved, your prescription is sent to a licensed US compounding pharmacy and shipped to you.
How do I take them?
Both are typically small subcutaneous injections, usually weekly, taken at home. Full directions and message-based support come with your protocol, and your care team helps you set the timing.
B12 or glutathione, with the formulation listed.
The ingredient, dose, and price are shown up front, with a care team you can message — no shelf blends and no marketing math.
- Online visits from your phone
- US-licensed medical providers
- LegitScript-certified US pharmacies
- Free discreet shipping
What to know about side effects
Both B12 and glutathione are generally well tolerated. Most effects are mild and tend to ease as your body adjusts.
This is not a complete list. Message your care team with any questions.
Most common
- Injection-site redness, itching, or swelling
- Mild nausea
- Headache
- Temporary flushing or warmth
- Loose stools (higher glutathione doses)
Less common — tell your provider
- Allergic reaction: rash, itching, or swelling
- Chest tightness or trouble breathing
- Wheezing (rare, more often with inhaled glutathione)
- Fainting
Important: Tell your provider about every medication and supplement you take and any history of kidney conditions or asthma. Not for use during pregnancy or breastfeeding, or under 18.
COMPOUNDED MEDICATIONS ARE NOT APPROVED OR EVALUATED FOR SAFETY, EFFICACY, OR QUALITY BY THE FDA.
- 1Pizzorno J. Glutathione! Integrative Medicine (Encinitas). 2014.
- 2Paul C, Brady DM. Comparative bioavailability and utilization of particular forms of B12 supplements. Integrative Medicine (Encinitas). 2017.
- 3Langan RC, Goodbred AJ. Vitamin B12 deficiency: recognition and management. American Family Physician. 2017.