Alcohol use is widely accepted in the US, but even moderate consumption is associated with many harmful effects

This month, millions of Americans are taking part in “Dry January” in an effort to forgo alcohol for a month and cleanse themselves of the excesses of the holiday season.

Alcohol is the most widely used drug in the world, including in the U.S.

In 2020, nearly 70% of people ages 18 and older in the U.S. said they had consumed an alcoholic drink in the previous year, according to the National Survey on Drug Use and Health. Additionally, 24% of people reported binge drinking – defined for women as four or more drinks per occasion and five or more drinks per occasion for men – in the previous month.

The COVID-19 pandemic brought with it important changes in alcohol consumption. One nationally representative sample found that while the number of people who reported drinking in the past year remained consistent from 2019 to 2021, the number of people consuming alcohol every day increased from 6.3% to 9.6%.

Partially because alcohol is such a commonly used substance, heavily marketed and glamorized in pop culture, Americans’ comfort with and acceptance of its use in everyday life is remarkably high. But should it be?

I research alcohol use and the associations between drinking and a wide range of problems. While the rising opioid epidemic has received a lot of attention in recent years, the number of deaths attributable to alcohol each year is on par with the overall number of annual deaths from drug overdose, with both increasing rapidly in the past few years.

In the past two decades, the idea that moderate drinking may actually confer health benefits has taken hold, backed up by some preliminary and limited evidence. This led to the broad notion in the popular media that a glass of red wine a day reduces the risk of cardiovascular disease and diabetes.

But there was one major flaw in many of the studies used to back up the claim that a glass of red wine is good for health. They compared those who drink at moderate levels to people who consume no alcohol whatsoever, rather than comparing those who drink heavily versus at lower levels.

There are many reasons why people who drink at moderate levels may be fundamentally different – and healthier – than those who do not drink at all. For example, many people who develop new illnesses unrelated to their alcohol use quit drinking, making the group of alcohol abstainers appear less healthy than those who consume alcohol at low or moderate levels.

In 2018, the National Institutes of Health initiated a large randomized control trial – the gold standard for understanding causal relationships – to look into the benefits of moderate drinking.

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