Magnesium taurate is the form most often recommended specifically for high blood pressure, because it combines magnesium with the amino acid taurine, and both compounds independently help lower blood pressure through the same mechanism: reducing calcium and sodium levels inside your cells, which relaxes blood vessel walls. That said, several forms of magnesium have lowered blood pressure in clinical trials, and the best choice depends on how well you absorb it and how your body tolerates it.
How Magnesium Lowers Blood Pressure
Magnesium acts as a natural calcium channel blocker. Calcium causes the smooth muscle cells in your artery walls to contract and tighten. Magnesium competes with calcium for entry into those cells, and when magnesium levels are adequate, your blood vessels relax and widen. This reduces the resistance your heart has to pump against, which lowers blood pressure.
A 2025 meta-analysis published in the American Heart Association journal Hypertension found that magnesium supplementation reduced systolic blood pressure by about 2.8 mmHg and diastolic by about 2.0 mmHg compared with placebo. Those numbers may sound modest, but the effects were far larger in two groups: people already taking blood pressure medication saw systolic drops of nearly 7.7 mmHg, and people who were low in magnesium to begin with saw drops of about 6.0 mmHg systolic and 4.8 mmHg diastolic. In other words, magnesium helps most when your body genuinely needs more of it.
Why Magnesium Taurate Stands Out
Taurine is an amino acid that lowers blood pressure on its own by the same basic pathway magnesium uses: pushing calcium and sodium out of cells. When magnesium is paired with taurine, the two work together to relax blood vessels, improve insulin sensitivity, stabilize heart rhythm, and protect against plaque buildup in arteries. Clinical guidance from a review in The Journal of Clinical Hypertension suggests adding 1,000 to 2,000 mg of taurine to a magnesium regimen, either as a separate supplement or as a combined magnesium taurate pill (typically available in doses of 100 to 500 mg).
Because taurine is an amino acid, magnesium taurate also qualifies as a chelated form, meaning the magnesium is bound to an organic molecule. Chelated forms are better absorbed and significantly less likely to cause the digestive issues that cheaper magnesium forms are notorious for.
Other Forms That Work
Several other forms have produced blood pressure reductions in controlled trials:
- Magnesium oxide: The most commonly studied form for hypertension. In one trial of 60 people with high blood pressure, 8 weeks of magnesium oxide lowered office blood pressure by 3.7/1.7 mmHg. It delivers a high amount of elemental magnesium per pill, which makes dosing convenient, but it is poorly absorbed compared to organic forms and is the most likely to cause loose stools or diarrhea.
- Magnesium citrate: An organic form with better absorption than oxide, though its absorption rate drops as the dose increases. It is widely available and moderately well tolerated, though higher doses can still have a laxative effect.
- Magnesium glycinate: Chelated with the amino acid glycine, this form is well absorbed and gentle on the stomach. It is a strong option if digestive side effects are a concern, though it has less cardiovascular-specific data than taurate.
- Magnesium aspartate: In a 6-month trial of 91 women with mild to moderate hypertension, 485 mg of elemental magnesium from magnesium aspartate lowered diastolic pressure by 3.4 mmHg. It is well absorbed but less commonly sold as a standalone supplement.
A systematic review of magnesium bioavailability confirmed the general rule: organic forms (citrate, glycinate, taurate, aspartate) are better absorbed than inorganic forms (oxide, hydroxide, carbonate). If your main goal is cardiovascular benefit and you want to minimize stomach trouble, a chelated organic form is the better pick.
Dosage and How Long It Takes
Clinical trials for blood pressure have used elemental magnesium doses ranging from about 80 mg to 637 mg per day, with a median dose of 365 mg. Most trials ran for about 12 weeks before measuring results. The recommended daily intake for adults is 310 to 320 mg for women and 400 to 420 mg for men, so the doses that lowered blood pressure in studies generally fell in that ballpark or slightly above.
One important distinction: the number on the supplement label is often the weight of the entire compound, not the elemental magnesium inside it. A 500 mg magnesium taurate capsule may contain only 50 mg of actual magnesium. Check the Supplement Facts panel for the elemental magnesium amount, which is what matters for dosing. In one trial, patients who took 600 mg of elemental magnesium daily alongside lifestyle changes saw their 24-hour blood pressure drop by 5.6/2.8 mmHg, compared to just 1.3/1.8 mmHg in the lifestyle-only group.
Digestive Side Effects by Form
Diarrhea is the most common side effect of magnesium supplementation, and it is directly tied to how much unabsorbed magnesium reaches your colon. Poorly absorbed forms like magnesium oxide and magnesium hydroxide draw water into the intestines (this is exactly why milk of magnesia works as a laxative). Research in the New England Journal of Medicine showed that for every additional millimole of magnesium in stool, fecal weight increases by about 7 grams, and the effect compounds quickly at higher doses.
Chelated forms like taurate and glycinate are absorbed higher up in the digestive tract, so less magnesium makes it to the colon. If you have tried magnesium for blood pressure before and quit because of stomach problems, switching to a chelated form often solves the issue entirely.
Interactions With Blood Pressure Medications
If you take diuretics (water pills), your magnesium levels may already be low, because many common diuretics flush magnesium out alongside sodium. Potassium-sparing diuretics like amiloride, triamterene, and spironolactone retain some magnesium, but not as effectively as they retain potassium, so even on those medications a deficiency is possible.
Magnesium can interact with several types of cardiovascular drugs in ways that amplify or interfere with their effects. People taking blood pressure medication actually showed the largest blood pressure reductions from magnesium supplementation in the meta-analysis (nearly 7.7 mmHg systolic), which means the combination is potent but also means the additive effect needs to be accounted for so your pressure doesn’t drop too low.
Putting It Together
For blood pressure specifically, magnesium taurate is the strongest choice because it delivers two compounds that lower blood pressure through the same pathway, absorbs well, and is easy on the gut. Magnesium glycinate is a close alternative if taurate is unavailable, with similarly good absorption and tolerability. Magnesium citrate is a reasonable budget option. Magnesium oxide works, but its poor absorption and laxative effects make it harder to stick with long term.
Whatever form you choose, aim for roughly 300 to 400 mg of elemental magnesium per day, expect to wait at least 8 to 12 weeks for measurable results, and keep in mind that the biggest blood pressure drops happen in people whose magnesium levels were low to begin with.