Micronutrients & recovery
Vitamin D supplementation at moderate to high doses (approximately 1000 IU/d or higher) may reduce the risk of cardiovascular disease (CVD) events, whereas calcium supplementation appears to have minimal or no effect on CVD risk.
If you are considering Vitamin D for heart health, standard low doses (400 IU) may not be enough. Current evidence suggests moderate to high doses (around 1000 IU/day) might offer a slight reduction in cardiovascular risk, though the results are not definitive. Calcium supplements do not appear to help prevent heart disease and should not be taken for that purpose alone. Consult your doctor before increasing Vitamin D dosage.
Evidence from limited data suggests that vitamin D supplements at moderate to high doses may reduce CVD risk, whereas calcium supplements seem to have minimal cardiovascular effects.
Why this rating
The review includes randomized controlled trials and prospective studies, but notes heterogeneity, small numbers, and lack of trials designed specifically for CVD as a primary endpoint.
Source
Systematic Review: Vitamin D and Calcium Supplementation in Prevention of Cardiovascular Events
Lu Wang et al. · Annals of Internal Medicine · 2010
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →