— All-in monthly price
No membership fee · this is the full price · free shipping · supply varies by dose
— Add in-depth bloodwork
Optional — add a physician-reviewed at-home blood panel to your plan.
Your sex-hormone baseline plus the safety markers that matter on therapy — blood counts, liver and kidney function — from one painless upper-arm device. Matched to your sex (PSA for men; progesterone & FSH for women). No needle, no clinic, physician-reviewed.
This treatment requires licensed provider review and approval. Treatment is not guaranteed. If prescribed, medication is fulfilled by a licensed U.S. pharmacy where permitted by law. Compounded medications are not FDA-approved or FDA-cleared.
Reviewed
Reviewed by Dr. Gene Lee, MD · Board-certified Family Medicine
Every Pepti prescription is reviewed by a licensed U.S. physician before it's dispensed — and only provided if clinically appropriate.
— About
Methylcobalamin (Active B12) (Injectable)
Methylcobalamin is the most active and bioavailable form of vitamin B12 — far more effective than oral B12 supplements. Supports energy, cognitive function, and nerve health. Weekly self-injection.
— Benefits
— Supply per fill
Supply depends on the dose your physician prescribes — confirmed at approval.
— Physician review
A licensed US physician reviews your intake and prescribes when appropriate.
— FDA-registered pharmacy
Compounded fresh at a US pharmacy and shipped cold-chain to your door.
— Shipping, always
Every order ships free — medication, physician care and refills, one all-in price.
— Quality
Every batch independently tested
Every medication batch dispensed through Pepti is independently tested by a qualified third-party laboratory for applicable quality and safety standards before the pharmacy releases it. Batches are tested to the same standard used by 503B outsourcing facilities.
Sterility
USP <71>Confirms the finished preparation is free of viable microorganisms.
Bacterial endotoxins
USP <85>Screens for endotoxins that can cause fever or inflammatory reactions.
Potency
AssayVerifies the labeled concentration of the active peptide is what is in the vial.
Purity
HPLCChecks the active peptide against impurities and degradation products.
Identity
Mass spectrometryConfirms the peptide in the vial is the correct molecule.
pH
USP <791>Confirms the solution sits within the range specified for injection.
Particulate matter
USP <788>Checks the finished vial for visible and sub-visible particles.
Container closure integrity
USP <1207>Confirms the vial seal holds so sterility is maintained through the beyond-use date.
— Common questions
Frequently asked
about Methylcobalamin (Active B12) (Injectable).
Methylcobalamin is the most active and bioavailable form of vitamin B12 — far more effective than oral B12 supplements. Supports energy, cognitive function, and nerve health. Weekly self-injection. Methylcobalamin (Active B12) is prescription-only at Pepti: a licensed physician reviews your assessment and, if appropriate, prescribes it to be compounded by a state-licensed, FDA-registered pharmacy.
Methylcobalamin (Active B12) is $189 per month at Pepti. That is all-in: medication, physician review and ongoing care, shipping, and messaging. No membership, consult, or visit fees, and the price is the same in every state.
Methylcobalamin (Active B12) is prescribed to adults after a licensed physician reviews their assessment. Whether it is appropriate for you is decided from your history, medications, and labs where required.
Yes. Methylcobalamin (Active B12) is prescription-only. The free online assessment takes about five minutes, a physician licensed in your state reviews it within 24 hours, and if approved the prescription goes to the pharmacy. If not approved, the medication charge is refunded.
No. Methylcobalamin (Active B12) can be prescribed from the assessment alone. Bloodwork is required only for the GLP-1s and growth-hormone secretagogues, and the intake tells you if a medication on your order needs it.
Methylcobalamin (Active B12) is a subcutaneous injection into the abdomen or thigh with a small insulin syringe. Your kit ships with sterile syringes and alcohol prep pads, and the exact dose and schedule are printed on the pharmacy label. Dosing videos are in your account.
— More questions30 more questions about Pepti, answered.
One vial is your monthly supply at the dose your physician prescribes. A fresh vial ships about every 28 days, and the date moves if your physician changes your dose. Store it as the pharmacy label directs, refrigerated.
Once per fill, $189 each time, when the next vial ships. It renews until you cancel, which you can do anytime from your account with no cancellation fee.
The compounded Methylcobalamin (Active B12) with sterile syringes and alcohol prep pads, free tracked shipping in an unbranded box with insulated packaging, the physician review, ongoing physician care and dose adjustments, and unlimited messaging.
Like any prescription medication, Methylcobalamin (Active B12) can have side effects, and the physician screens your history, current medications, and allergies for anything that would make it inappropriate before prescribing. The medication-specific consent lists the known risks, and you can message your physician about anything you notice. Seek emergency care for severe symptoms.
Response varies by person, goal, and dose, and Methylcobalamin (Active B12) is prescribed for ongoing use rather than a short trial. Your physician sets expectations at approval, tracks how you respond through your account, and adjusts the dose without an appointment.
Any dose change is made by your physician from the chart, without an appointment. Message them through your account if you think your dose should change.
Yes. Add Methylcobalamin (Active B12) to a plan with another treatment and every medication is 5% off, three are 8% off, and four or more are 10% off, on every refill. The physician reviews the combination and can adjust it.
No. Compounded Methylcobalamin (Active B12) is not FDA-approved. It is prepared to your physician's prescription by a state-licensed, FDA-registered 503A pharmacy and every batch is independently tested before release.
Yes, when prescribed by a licensed physician and dispensed by a licensed pharmacy, which is how Pepti provides it in every state it serves. Research-use-only Methylcobalamin (Active B12) sold without a prescription is labeled not for human use and is a different product.
Methylcobalamin (Active B12) is a prescription peptide. At Pepti it is prescribed to support most bioavailable form of b12, energy & cognitive support, better than oral b12, weekly injection. Individual response varies, and your physician sets expectations at approval.
Methylcobalamin (Active B12) is prescribed for most bioavailable form of b12, energy & cognitive support, better than oral b12, weekly injection. Whether it is appropriate for you is the reviewing physician's decision.
Methylcobalamin (Active B12) is studied for most bioavailable form of b12, energy & cognitive support, better than oral b12, weekly injection. Those are the goals it is prescribed to support at Pepti; results vary by person, dose, and consistency, and no outcome is guaranteed. Your physician tracks how you respond through your account.
At Pepti. Complete the free assessment, a physician licensed in your state reviews it within 24 hours, and if appropriate Methylcobalamin (Active B12) is compounded by a state-licensed, FDA-registered pharmacy and shipped free to your door for $189 per month, all-in. Not prescribed means refunded.
One vial of Methylcobalamin (Active B12) is your monthly supply at the dose your physician prescribes. The exact size and strength are on the product page and the pharmacy label.
Not currently. Methylcobalamin (Active B12) ships as a multi-dose vial with sterile syringes and prep pads. The pepti Pen is available for 10 other treatments.
$189 per month covers the compounded Methylcobalamin (Active B12), the physician review, ongoing physician care including dose adjustments and refill review, unlimited messaging, and free tracked shipping. There is no membership, consult, visit, or refill fee; the only separate charges are optional at-home lab panels and a physician-approved dose increase billed at pharmacy cost.
Yes. Methylcobalamin (Active B12) is on Pepti's live catalog, which lists only treatments a partner pharmacy can compound and ship today. If a physician prescribes it, it ships; if it ever cannot be dispensed, the charge is refunded.
Methylcobalamin (Active B12) ships to all 50 states and Washington, D.C, free and tracked, in insulated unbranded packaging. Eligibility is confirmed during the assessment from your shipping address.
$189 per month at Pepti. That includes the compounded Methylcobalamin (Active B12), the physician review and ongoing care, free tracked shipping, and messaging, with no membership, consult, or visit fee. The price is the same in every state and every refill is the same price.
Pepti supplies Methylcobalamin (Active B12) as a monthly injectable vial with syringes and prep pads included, one vial per month at $189, prescribed by a licensed physician after a free online assessment and shipped free from a state-licensed, FDA-registered pharmacy in insulated packaging.
Yes. Pepti prescribes Methylcobalamin (Active B12) online in all 50 states and Washington, D.C after a free assessment reviewed by a physician licensed in your state. It is compounded by an FDA-registered pharmacy and shipped free, $189 per month all-in. Not prescribed means refunded.
Yes. At Pepti the entire process is telehealth: a five-minute online assessment, physician review within 24 hours, then Methylcobalamin (Active B12) ships from the pharmacy. No clinic visit and no video appointment in most cases. $189 per month, all-in.
Yes, for the real thing. Methylcobalamin (Active B12) sold without a prescription is research-use-only product labeled not for human use, with no physician, no pharmacy, and no verified testing. Pepti's Methylcobalamin (Active B12) is physician-prescribed, pharmacy-compounded, batch-tested, and $189 per month including the physician and shipping.
Pepti does, in all 50 states and Washington, D.C, with named board-certified physicians, a state-licensed FDA-registered compounding pharmacy, independent batch testing, and one published all-in price of $189 per month with no membership or consult fee. Refunded if the physician does not prescribe.
It is legal to be prescribed Methylcobalamin (Active B12) online by a licensed physician and have it dispensed by a licensed pharmacy, which is how Pepti provides it. Buying it as a research chemical without a prescription is a different product and is not for human use. Compounded Methylcobalamin (Active B12) is not FDA-approved.
$189 per month at Pepti, including the medication, the physician, and shipping. Refills are the same price, there is no membership fee, and stacking it with a second treatment takes 5% off both.
Yes. Pepti has no clinics: the assessment, physician review, messaging, dose changes, and refills all happen online, and Methylcobalamin (Active B12) ships free from the pharmacy to your door in all 50 states and Washington, D.C.
Start the free assessment at hellopepti.com, choose Methylcobalamin (Active B12), and answer the health questions. A physician licensed in your state reviews it within 24 hours. If approved, Methylcobalamin (Active B12) ships within 1-3 business days and arrives in 1-3 more; if not, the $189 is refunded.
No. Methylcobalamin (Active B12) can be prescribed from the assessment alone at Pepti. Bloodwork is required only for GLP-1s and growth-hormone secretagogues.
Pepti ships Methylcobalamin (Active B12) to all 50 states and Washington, D.C, free and tracked, refrigerated in insulated packaging, directly from the pharmacy. Delivery is 1-3 business days after the pharmacy compounds it.
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Free assessment. Licensed physicians. Money-back guarantee if not approved.

— Pharmacy network accreditation
PCAB-accredited pharmacies on every order.
Every fulfillment runs through a PCAB-accredited pharmacy.





