Big effect
Magnesium plus vitamin D slashed hs-CRP by nearly two-thirds of a point in a meta-analysis of overweight and obese adults — but the effect vanished when vitamin E was substituted for vitamin D.
This is an intriguing signal from a small meta-analysis (509 participants, only 3 studies) where the overall evidence strength is still rated low, so the impressive drop in inflammation should be treated as a promising hypothesis, not a settled fact.
Combining magnesium with vitamin D significantly reduced hs-CRP, a key marker of systemic inflammation, in people who are overweight or obese. However, swapping vitamin D for vitamin E wiped out the benefit, and the result comes from a small body of low-strength evidence where two studies showed benefit and one found no effect.
Where this fits in the evidence
Pillser has synthesized 3 studies on Magnesium for Reduced C-Reactive Protein Levels — overall evidence strength: Low.
Across 3 studies, 2 reported beneficial effects of magnesium on reducing C-reactive protein levels, while 1 found neutral results. The beneficial effects were typically small to moderate in magnitude, with statistically significant reductions observed in systematic reviews of participants with metabolic syndrome and overweight/obese populations. Effects were observed at a median study duration of approximately 12 weeks, though data on dose and form were insufficient for generalisation.
The study
- Systematic Review
- n = 509
- 2025-09-01
- Frontiers in nutrition
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.