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    Foundational · live pricing

    Where to Buy Magnesium — Cheapest Vendor in 2026

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

    No in-stock Magnesium 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 Magnesium.

    Coupon codes

    Every active vendor coupon for Magnesium, click-to-copy.

    Reconstitution calculator

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

    What is Magnesium?

    Magnesium is the fourth most abundant cation in the human body and the second most abundant intracellular cation after potassium, with approximately 25 grams present in a typical adult—roughly 60% stored in bone, 27% in muscle, 6-7% in other soft tissues, and less than 1% in extracellular fluid including serum. Despite this substantial total-body load, magnesium deficiency is extraordinarily commo… Read the full Magnesium research profile

    Buying Magnesium — FAQ

    Where can I buy Magnesium online?

    Magnesium 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 Magnesium?

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

    Is buying Magnesium 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 Magnesium?

    Magnesium is sold for research-use-only by the vendors on this page — no prescription required for research purchases. None of these vendors sell Magnesium 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 .