Does Iron Supplementation Promise Lower Heart Attack Risk?

Iron and HeartA new study identifies low levels of iron as a risk factor for cardiovascular disease, one of the leading causes of death worldwide and researchers look at iron supplementation as a low cost method for reducing the risk of heart disease.

Genomic data from over 48,000 people was used in this study.  Genetic variations were used as a way to determine a person’s iron level and its link to their cardiovascular disease risk (CVD).  Researchers looked at a trio of points located in the genome (the genetic material of an organism) where a single nucleotide polymorphism (SNP), an alteration in the DNA, can increase or decrease the iron status of a person. These SNPs were identified as rs1800562 and rs1799945 in the HFE gene and rs855791 in the TMPRSS6.  When these SNPs were reviewed researchers found those participants with the SNPs for higher iron status had reduced risks for coronary artery disease (CAD).

Current research has shown mixed results regarding iron and cardiovascular disease.  High iron stores have also been associated with increased risks factors for CVD, like Type 2 Diabetes.  Observational studies have also shown a protective effect of increased iron levels on CAD as wells as an increased death rate in patients with iron deficiency and heart failure.

This study used the Mendelian randomization technique, which has been proven effective in accounting for reverse causation, lifestyle factors or environmental factors.  The World Health Organization estimates approximately 2 billion people worldwide do not get enough iron from their diet, which can lead to anemia, shortness of breath, increased risk of infections, heart palpitations, and may cause tiredness.

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