*Actual product packaging may differ from the image shown.
B12 Methylcobalamin (Injectable)
Shop All Treatments
Methylcobalamin: Active B12 Injection for Energy and Nervous System Support
The active coenzyme form of B12, preferred by providers for methylation-sensitive patients.
Methylcobalamin is the methylated, active coenzyme form of vitamin B12, the form your body actually uses in tissues. While cyanocobalamin is more shelf-stable and widely studied, methylcobalamin is the form your nervous system uses directly. It’s often preferred for patients with MTHFR variants, neurological symptoms, or who haven’t responded fully to cyanocobalamin. Most people use it for energy, cognitive sharpness, nerve health, and mood support.
Physician-prescribed · Compounded by licensed US pharmacies · Active coenzyme form · Ongoing care team support
Methylcobalamin (active B12): Methylcobalamin is the cobalamin form that participates directly in methylation reactions throughout the body, including the conversion of homocysteine to methionine and the synthesis of neurotransmitters. For people with genetic variants that reduce methylation capacity (such as MTHFR mutations) or who have neurological symptoms, methylcobalamin can be more directly bioavailable than cyanocobalamin.
Best for: Adults with suboptimal B12 status who want the active coenzyme form, particularly those with MTHFR variants, neurological symptoms, or who haven’t responded to cyanocobalamin.
Not recommended for: Anyone with cobalt allergy or Leber’s hereditary optic neuropathy.
Most common side effects are mild injection site reactions, occasional headache, or nausea. Allergic reactions are rare.
¹ Reverses the anemia and neurological symptoms of B12 deficiency Stabler SP. Vitamin B12 Deficiency. New England Journal of Medicine, 2013;368(2):149-160. → PubMed
² Rapidly restores serum B12, bypassing gut absorption problems Andrès E, Loukili NH, Noel E, et al. Vitamin B12 (cobalamin) deficiency in elderly patients. CMAJ, 2004;171(3):251-259. → PubMed
³ Lowers elevated homocysteine, a marker of B-vitamin status Clarke R, Halsey J, Lewington S, et al. Effects of lowering homocysteine levels with B vitamins on cardiovascular disease, cancer, and cause-specific mortality. Archives of Internal Medicine, 2010;170(18):1622-1631. (B vitamins reliably lower homocysteine but have NOT reduced clinical cardiovascular events in non-deficient adults.) → PubMed
How it Works With EHRX
The entire process is online. No waiting rooms. Just straightforward, medically guided care.
Step 1
Choose your treatment and complete checkout
You'll receive a confirmation email with next steps.
Step 2
Complete a brief medical consultation
Check your email for a link to a short intake form and link to a virtual consult with a licensed physician.
Step 3
A licensed provider reviews your consultation
If approved, your prescription is written and sent to the pharmacy. If not, you receive a full refund.
Step 4
Your pharmacy ships within 3–5 business days
Your medication is shipped directly to your door in temperature-controlled packaging.
What to know before you start.
B12 Methylcobalamin (Injectable) is a compounded medication prepared by a licensed pharmacy for individual patient use.
It has not been reviewed by the FDA for safety or efficacy, and is prescribed based on the clinical judgment of a qualified healthcare provider. Compounded drugs are permitted to be prescribed but are not FDA-approved for safety and efficacy.
Clinical Evidence
Methylcobalamin has been studied for peripheral neuropathy, cognitive symptoms, and energy in B12-deficient populations, with comparable efficacy to cyanocobalamin in most metrics and potential advantages in neurological recovery. (Source: Zhang et al., Annals of Indian Academy of Neurology, 2019)
Frequently Asked Questions
We aim to provide absolute clarity regarding your biological data and personalized wellness protocols.
Subcutaneous or intramuscular injection, typically weekly initially, then less frequently for maintenance.
Energy and clarity often shift within 1 to 2 weeks if a true deficiency is present.
Methylcobalamin is the active coenzyme form your body uses directly, which can matter for people with methylation issues or neurological symptoms.
A baseline B12 level is helpful but not always required.
You won’t be charged for the medication.
Compounded methylcobalamin is typically paid out of pocket.
Yes, at any time before your next shipment, with no long-term commitment.
Initial check-in at 4 to 8 weeks, then on a recurring cadence.
Yes. You’ll receive instructions and a video walkthrough.
The next generation
of weight management.
Dual-incretin metabolic support — personalized to you.
