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Research on Alcohol and Heart Disease
In several studies of diverse populations, moderate alcohol consumption has been associated with a reduced risk for certain cardiovascular diseases, such as coronary heart disease. These studies were observational—not experimental—and therefore had some limitations. However, they showed the need for experimental studies regarding alcohol intake and heart disease. So in 1999, a meta-analysis was conducted on all experimental studies to date to assess the effects of moderate alcohol intake on various health measures (such as HDL "good" cholesterol levels and triglycerides), and other biological markers associated with risk of coronary heart disease. As research on this topic continued to expand, researchers conducted another systematic review of 63 studies that examined adults without known cardiovascular disease before and after alcohol use. This latest meta-analysis was published in a 2011 issue of the British Medical Journal (get a link to the full report in the Sources section below).
The analysis of these numerous studies suggests that moderate alcohol consumption (defined below) helps to protect against heart disease by: