Alcohol consumption commonly regarded as moderate may carry substantial health risks, according to the Alcohol Intake and Health Study, published in the Journal of Studies on Alcohol and Drugs. Examining lifetime risks among Americans, researchers linked drinking to cancer, cardiovascular disease, disability and premature death, with risks increasing alongside consumption.
An average intake of 14 alcoholic drinks per week—equivalent to two daily—was associated with an estimated one-in-25 lifetime risk of alcohol-related death. Consumption of up to seven weekly drinks was linked to small increases in risk for most conditions. Above one drink per day, risks became more pronounced for both sexes.
Although low consumption may be associated with reduced risks of ischaemic heart disease and stroke, the analysis identified no significant overall protective effect at any intake level. Potential cardiovascular benefits were outweighed by cancer and other chronic disease risks, even at seven drinks weekly. The conditions examined also included liver disease and injuries.
Researchers reviewed more than 7,200 scientific publications, combined condition-specific evidence with large national health datasets, and used statistical modelling to estimate outcomes. Lead author Kevin Shield, of the University of Toronto, emphasised that population-level estimates cannot precisely predict individual outcomes. Lifestyle, genetics and drinking patterns can substantially alter personal risk.
Commissioned by the US federal government to inform updated dietary recommendations, the study offers numerical estimates alongside guidance that now advises limiting alcohol without specifying a threshold. Previous recommendations set daily ceilings of two drinks for men and one for women. The findings do not establish a completely safe intake; instead, they indicate that lower consumption generally reduces exposure to alcohol-related harm.
