Study Claims Vitamin and Mineral Supplements Don’t Lower the Risk of Stroke or Heart Attack

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A new study conducted by the St. Michael’s Hospital proves that vitamin and mineral supplements have no health benefit. They don’t prevent cardiovascular disease, heart attack, stroke or early death.

The study analyzed existing data and also conducted single randomized control trials from 2012 to 2017. It found that multivitamins, vitamin D, vitamin C, and calcium had no advantage or posed no harm in early death due to cardiovascular disease.

Usually, people take vitamin and mineral supplements to improve the nutritive intake that cannot be found in food. Even the study lead author, David Jenkins was surprised to see these results:

“We were surprised to find so few positive effects of the most common supplements that people consume. Our review found that if you want to use multivitamins, vitamin D, calcium or vitamin C, it does no harm – but there is no apparent advantage either.”

Folic Acid or B-vitamins With Folic Acid Reduces Cardiovascular Disease and Stroke

Researchers found that only folic acid or B-vitamins with folic acid can reduce cardiovascular disease and stroke. However, niacin and antioxidants have a small effect.

Jenkins added that people should now know if the supplements they take are good for their condition:

“People should be conscious of the supplements they’re taking and ensure they’re applicable to the specific vitamin or mineral deficiencies they have been advised of by their healthcare provider.”

He and his team reviewed a multivitamin supplement data which had A, B1, B2, B3 (niacin), B6, B9 (folic acid), C, D and E; and ß-carotene; calcium; iron; zinc; magnesium; and selenium.

Jenkins concludes that there is a small positive data on multivitamins, “apart from folic acid’s potential reduction in the risk of stroke and heart disease.” He recommends people to rely on a healthy diet and get the vitamins and minerals naturally. His study and previous research show that supplements are no better than eating unprocessed plant foods like vegetables, fruits, and nuts.

More information on the study can be found in the Journal of the American College of Cardiology.

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Andre Blair s is the lead editor for Advocator.ca. He holds a B.A. in Psychology from the University of Toronto, and a Master of Science in Public Health (M.S.P.H.) from the School of Public Health, Department of Health Administration, at the University of North Carolina at Chapel Hill. Andre specializes in environmental health, but writes on a variety of issues.


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