The pooled trial data
38
randomized controlled trials pooled in the 2025 Hypertension meta-analysis
2,709
participants across those trials
~2.8 / 2.1
mmHg average systolic / diastolic reduction -- largest in people who were low
Does magnesium lower blood pressure? Pooled data from 38 randomized controlled trials in 2,709 people found magnesium supplementation lowered systolic blood pressure by about 2.8 mmHg and diastolic by about 2.1 mmHg, largest in people who were magnesium-deficient to start. Trial doses cluster around 370 to 400 mg per day. It is not a replacement for medication.
Your arteries have a relaxation signal
The calcium counterweight
Every artery is wrapped in smooth muscle that is constantly deciding how tight to squeeze. Calcium is the contract signal. Magnesium regulates how much calcium enters those muscle cells and when they let go -- it is the body's built-in relaxation setting for vascular tone.
The nitric oxide connection
The endothelium -- the one-cell-thick lining of every vessel -- makes nitric oxide, the molecule that tells vessels to open. Magnesium supports that lining. Low magnesium status is associated with stiffer, more constricted, more oxidatively stressed vessels.
Small lever, long horizon
Nobody feels a 2 mmHg difference. But vascular load works on time, not feelings -- it is an exposure carried every hour for decades. A small improvement in how vessels regulate themselves, held for a long horizon, is a very different story.
The honest boundaries
- Not a replacement for medication. Nothing here is a reason to change a prescription -- that conversation belongs with your clinician.
- More is not better. The studied range is modest, taken consistently. Megadosing is not what the trials tested.
- A normal blood test can still hide low tissue stores. Serum magnesium reflects less than 1 percent of the body's total magnesium. Test intelligently and read results alongside diet and symptoms.
- Know your blood pressure. It is a free, continuous, decades-long signal -- worth tracking even in your 20s and 30s.
Where magnesium fits
Minerals work as a team, not solo acts
Magnesium partners with potassium, calcium, and the rest of the mineral foundation to support normal cellular and vascular function. That is why we anchor on a comprehensive daily foundation rather than a drawer of single bottles. LifePak carries magnesium alongside the minerals it works with, at member pricing through our store, and it is backed by a 100 percent money-back satisfaction guarantee -- a straightforward refund, not a promise of a specific health outcome.
Keep exploring
The full article
The Two-Point Mineral -- the trials, the mechanism, and the honest boundaries, in seven minutes.
Magnesium in the library
The ingredient page: every mechanism, marker, and study connection we have on file.
Search the studies
Our searchable science library -- filter the magnesium evidence by mechanism yourself.
Nutrition diagnostics
Test, don't guess -- the measurement options for finding out where you actually stand.
Free tools
The lab guide, the OligoScan reader, and every other free tool on the site.
Minerals, the pillar
Magnesium never works alone -- the full mineral foundation it belongs to.
The receipts
Every claim on this page traces to a published study. Read them yourself:
- Magnesium supplementation and blood pressure: meta-analysis of 38 randomized controlled trials, 2,709 participants (Hypertension, 2025)
- Effects of Magnesium Supplementation on Blood Pressure: A Meta-Analysis of Randomized Double-Blind Placebo-Controlled Trials (Hypertension, 2016)
- Impact of magnesium supplementation on blood pressure: umbrella meta-analysis (2024)
- Hypomagnesemia: its multifaceted health impacts and associations with blood pressure regulation (2025)
- Magnesium and Potassium Supplementation for Systolic Blood Pressure in the General Normotensive Population (2024)
Education only, not medical advice. Structure and function of the body only. Study citations are ingredient and mechanism science, not claims about any product.