Numerous epidemiological studies, numbering nearly 100, have documented an inverse association between alcohol consumption and vascular risk. The preponderance of evidence supports an independent beneficial effect of mild-to-moderate alcoholic beverage consumption on risk of coronary heart disease (CHD). However, it is important to remember that observational data cannot prove causation; unmeasured or incompletely controlled confounding factors cannot be excluded. That said, most authorities now attribute a causal role to the relationship: moderate alcohol consumption reduces the risk of CHD, and current research centers on the mechanistic underpinnings and whether patterns of drinking are important. Here, I review the association between alcohol use and CHD risk, explore putative mechanisms, and make recommendations.