As with other vitamins and minerals, food should be your primary source of magnesium whenever possible.
Takingtoo much magnesiumthrough supplements can cause side effects, some severe.
As a result, some supplement products may not contain the ingredients listed on the label.

Maryna Terletska / Getty Images
Magnesium also helps blood vessels stay healthy by working as an antioxidant to counteract blood vessel damage.
Some studies have found magnesiums benefits in lowering blood pressure to be inconclusive or only providing a small benefit.
One study analyzed the results of 34 different clinical trials.
Another study analyzed the results of 49 clinical trials of oral magnesium supplements for high blood pressure.
What Does Magnesium Do for the Body?
Magnesiumis a mineral found in food, supplements, and some medicines.
It assists the body in making protein,bone, and DNA (genetic material).
It also decreasestype 2 diabetesrisk and symptoms by helping to regulate blood sugar.
The FDA does not require food labels to list magnesium content unless magnesium has been added to the food.
(Note that the terms for sex or gender from the linked source are used in this article.)
Talk to a Healthcare Provider
Contact a healthcare provider before taking magnesium supplements.
These supplements can cause side effects and interact with certain medications.
Should I Take Magnesium Supplements?
Magnesium supplements are available in various forms, and how well they are absorbed in the body varies.
However, they were not effective in those with high blood pressure who were not taking blood pressurelowering medications.
No supplement is intended to treat, cure, or prevent disease.
Magnesium Side Effects
Magnesium from food isnt harmful in any quantity and doesnt need to be limited.
This occurs because the RDAs include magnesium from all sourcesfood, beverages, dietary supplements, and medications.
Magnesium performs many important bodily functions and is best consumed through dietary sources.
If you have trouble getting enough magnesium through food, supplements may be considered in some cases.
Dominguez L, Veronese N, Barbagallo M.Magnesium and hypertension in old age.Nutrients.
Food and Drug Administration.FDA announces qualified health claim for magnesium and risk of reduced blood pressure.
Dietary Guidelines for Americans.Top 10 things you oughta know about theDietary Guidelines for Americans, 2020-2025.
National Institutes of Health Office of Dietary Supplements.Magnesium fact sheet for health professionals.
Academy of Nutrition and Dietetics.Vitamins minerals and supplements: do it’s crucial that you take them?.
2024;20(3):715-726. doi:10.1007/s11332-024-01179-8