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    Foundational · live pricing

    Where to Buy Vitamin B12 — Cheapest Vendor in 2026

    Live Vitamin B12 pricing across every research peptide vendor we track, ranked by price per mg. Updated daily.

    No in-stock Vitamin B12 listings right now.

    Vendor inventory updates daily — listings populate this page automatically as supply returns. Use the compound profile to track research progress in the meantime.

    Research profile

    Mechanism, dosing, half-life, peer-reviewed studies for Vitamin B12.

    Coupon codes

    Every active vendor coupon for Vitamin B12, click-to-copy.

    Reconstitution calculator

    Vial size + BAC water → concentration, syringe units, doses per vial.

    What is Vitamin B12?

    Vitamin B12 (cobalamin) is a water-soluble cobalt-containing vitamin that serves as a coenzyme for two critical enzymes in human metabolism: methionine synthase (cytoplasmic) and L-methylmalonyl-CoA mutase (mitochondrial). It is the largest and most structurally complex vitamin, built around a corrin ring that coordinates a central cobalt atom, with different upper-axial ligands defining the four … Read the full Vitamin B12 research profile

    Buying Vitamin B12 — FAQ

    Where can I buy Vitamin B12 online?

    Vitamin B12 is currently between in-stock listings across the vendors we track. Bookmark this page — it auto-updates daily as inventory comes back.

    What's the cheapest price for Vitamin B12?

    Pricing data updates as vendors restock. Check back when listings come back in stock.

    Is buying Vitamin B12 online safe?

    Vendor safety varies. BodyHackGuide ranks every vendor on a 0-100 Trust Score (COA verification, payment transparency, community feedback, shipping practices). Vendors below the Trust Score threshold aren't surfaced on this page. The vendor profile linked from each listing shows their full score breakdown.

    Do I need a prescription for Vitamin B12?

    Vitamin B12 is sold for research-use-only by the vendors on this page — no prescription required for research purchases. None of these vendors sell Vitamin B12 for human consumption, and BodyHackGuide doesn't promote off-label use. Always consult a licensed practitioner before any compound enters a clinical context.

    Affiliate disclosure. BodyHackGuide may earn a commission from purchases made via the links on this page — at no additional cost to you. Vendor rankings are based purely on live price-per-mg data and the published Trust Score rubric. We don't accept payment for editorial placement. See our full affiliate disclosure .