How strong is the evidence for Magnesium?

Multiple independent meta-analyses of randomized trials, spanning from 2002 to 2025, consistently find magnesium supplementation produces a small but real reduction in blood pressure, with effects present across general and diabetic populations. That evidence is currently rated moderate (62/100), built on 10 published studies, including 10 meta-analyses -- a reasonable base, but not yet enough for full certainty.