Vitamin D Supplements May Be a Double-Edged Sword

 "In the meantime, I can tell you that for your "average woman," vitamin D supplementation likely has no effect on mortality. It might modestly reduce the risk for certain cancers while increasing the risk for heart disease (probably through coronary calcification). So, there might be some room for personalization here. Perhaps women with a strong family history of cancer or other risk factors would do better with supplements, and those with a high risk for heart disease would do worse. Seems like a strategy that could be tested in a clinical trial. But maybe we could ask the participants to give up their extracurricular supplement use before they enter the trial."



For more details:

Vitamin D Supplements May Be a Double-Edged Sword

And some related blogpost:

Getting adequate vitamin D in the fall and winter

Vitamin D supplements can keep bones strong – but they may also have other benefits to your health

Vitamin D dose guidance may not be high enough for heart health

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