- In studies testing the four common supplements of multivitamins, vitamin D, calcium and vitamin C, there was no reduction in the incidence of heart disease, stroke or premature death.
- Folic acid supplements showed a reduction in heart disease and stroke. But high levels of folic acid in the blood may increase the risk of prostate cancer.
- Among those taking statin medication to lower blood cholesterol, slow or extended release vitamin B3 (niacin) increased the risk of early death by 10%.
- Antioxidant supplements also had a marginally significant increase of early that risk.
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