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Some supplements benefit cardiovascular health while others do not: Study - Video

Published On 2022-12-06T09:30:16+05:30  |  Updated On 6 Dec 2022 2:30 PM IST
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Overview

Antioxidant supplementation has long been thought to play a role in heart health. That's because these nutrients work to reduce oxidative stress, a known contributor to many cardiovascular diseases. Heart-healthy diets like the Mediterranean diet and the Dietary Approach to Stop Hypertension (DASH) feature foods that are naturally rich in antioxidants. However, results from studies of antioxidant supplements have been inconsistent-one reason why this approach hasn't yet been widely adopted in preventative cardiology.

Healthy diets are rich in antioxidants like amino acids, omega-3 fatty acids and vitamin C, but exactly how beneficial these micronutrients are for cardiovascular health has long been controversial. Now a new meta-analysis published in the Journal of the American College of Cardiology provides some clarity.

Researchers systematically reviewed a total of 884 studies available to date on micronutrients taken as dietary supplements and analyzed their data. They identified several micronutrients that do reduce cardiovascular risk-as well as others that offer no benefit or even have a negative effect. More than 883,000 patients were involved in the combined studies.

"For the first time, we developed a comprehensive, evidence-based integrative map to characterize and quantify micronutrient supplements' potential effects on cardiometabolic outcomes," said Simin Liu, MD, MS, MPH, ScD, professor of epidemiology and medicine at Brown University and a principal investigator for the study. "Our study highlights the importance of micronutrient diversity and the balance of health benefits and risks."

The findings could be used as the basis of future clinical trials to study specific combinations of micronutrients and their impact on cardiovascular health, he said.

"Research on micronutrient supplementation has mainly focused on the health effects of a single or a few vitamins and minerals," Liu said. "We decided to take a comprehensive and systematic approach to evaluate all the publicly available and accessible studies reporting all micronutrients, including phytochemicals and antioxidant supplements and their effects on cardiovascular risk factors as well as multiple cardiovascular diseases."

The researchers looked at randomized, controlled intervention trials evaluating 27 different types of antioxidant supplements. They found strong evidence that several offered cardiovascular benefit. These included omega-3 fatty acid, which decreased mortality from cardiovascular disease; folic acid, which lowered stroke risk; and coenzyme Q10, an antioxidant sometimes marketed as CoQ10, which decreased all-cause mortality. Omega-6 fatty acid, L-arginine, L-citrulline, Vitamin D, magnesium, zinc, alpha-lipoic acid, melatonin, catechin, curcumin, flavanol, genistein and quercetin also showed evidence of reducing cardiovascular risk.

Not all supplements were beneficial. Vitamin C, Vitamin D, Vitamin E and selenium showed no effect on long-term cardiovascular disease outcomes or type-2 diabetes risk. And beta carotene supplements increased all-cause mortality.

According to the researchers, the findings point to the need for more personalized, precision-based dietary interventions that involve specific combinations of beneficial supplements. Further study is needed, including large, high-quality interventional trials to investigate the long-term effects of certain micronutrients on health.

"Identifying the optimal mixture of micronutrients is important, as not all are beneficial, and some may even have harmful effects," Liu said.

Reference:

Simin Liu, et al,Micronutrient Supplementation to Reduce Cardiovascular Risk, Journal of the American College of Cardiology, DOI 10.1016/j.jacc.2022.09.048

Speakers

Isra Zaman

B.Sc Life Sciences, M.Sc Biotechnology, B.Ed

Isra Zaman is a Life Science graduate from Daulat Ram College, Delhi University, and a postgraduate in Biotechnology from Amity University. She has a flair for writing, and her roles at Medicaldialogues include that of a Sr. content writer and a medical correspondent. Her news pieces cover recent discoveries and updates from the health and medicine sector. She can be reached at editorial@medicaldialogues.in.

Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751
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