New Study Shows That Even One Drink a Day Is Too Much

The headline conclusion is straightforward: across the full picture of health, the harms of drinking outweigh any benefit, even at low levels. The work, known as the Alcohol Intake and Health Study and detailed in the Journal of Studies on Alcohol and Drugs, found no protective effect strong enough to tip that balance back the other way.

What gives the study its weight is the method behind it. Rather than running a single new experiment, the team — American, Canadian, and British scientists first convened in 2022 to help inform the federal Dietary Guidelines for Americans — analyzed 56 systematic reviews of the relationship between alcohol and health, then applied those findings to United States mortality data drawn from national surveys, injury surveillance, and vital statistics. They compared people who drink with people who have never been drinkers, and they deliberately set aside former drinkers to avoid a well-known trap researchers call "sick-quitter" bias, where people who have already stopped drinking because of illness make alcohol look more dangerous than it is. That careful framing is part of why the conclusions are hard to wave away.

The study's most useful contribution may be that it translates a fuzzy worry into a concrete scale. According to the researchers' analysis of United States mortality data, the lifetime risk of dying from an alcohol-related disease or injury rises in clear steps as weekly drinking goes up.

Roughly one drink a day lands near the bottom of that ladder, at about a 1-in-1,000 lifetime risk — low in absolute terms, but a genuine increase over not drinking, and a number that climbs quickly as the pours add up. At the top of the scale, the jump is stark. "One in 25 is a very high risk," said Jürgen Rehm, a senior scientist at the Centre for Addiction and Mental Health in Toronto and one of the study's co-authors, describing the odds faced by someone averaging two drinks a day.

Part of what makes alcohol confusing is that it does a few helpful things alongside the harmful ones. The study observed somewhat lower risks of ischemic stroke and ischemic heart disease at low intake — the kernel of truth behind the old "red wine is good for your heart" idea. The problem is what sits on the other side of the ledger. At about a drink a day, alcohol was tied to higher risks of death from liver cirrhosis, several cancers — oral, throat, voice box, esophageal, colon, and liver in both sexes, plus breast cancer in women — and injuries, compared with people who never drink.

On balance, those harms win out. The heart benefit is also fragile: it is canceled out by even occasional binge drinking, defined as five or more drinks in a sitting for men or four or more for women. Co-author Priscilla Martinez-Matyszczyk, deputy scientific director of the Alcohol Research Group at California's Public Health Institute, put it plainly, noting that the harms from injuries, cancers, and other diseases "far outweigh any benefits to the heart." Women appear to carry an especially steep curve — at two drinks a day, their relative risk of death from severe liver disease was more than twice that of men drinking the same amount.

This is not a fringe position. The World Health Organization stated in 2023 that no level of alcohol consumption is safe for health, and alcohol is classified as a Group 1 carcinogen — the same top-tier category as tobacco and asbestos. The American Cancer Society similarly links drinking to cancers of the mouth, throat, voice box, esophagus, liver, colon and rectum, and breast.

So where does that leave someone with a glass of wine in hand? The researchers stop short of telling anyone to quit. Instead, they argue for a clearer benchmark than the vague advice now in circulation. Martinez-Matyszczyk has said the current "less is best" message is accurate but too soft to act on, and that people deserve quantified guidance to make their own informed decisions. The study's own suggested ceiling is a gender-neutral one: no more than one drink a day for adults who choose to drink.

Numbers like these are easier to use when they are personal. The American Cancer Society advises people who do drink to keep it to no more than one drink a day for women and one or two for men, while adding that "for optimal cancer prevention, it is best to avoid alcohol completely," and that anyone at high risk of cancer or recurrence has reason to be especially cautious. Rehm framed the same idea as a kind of family-history math. Someone whose relatives mostly died of heart disease, he suggested, might weigh a small amount of alcohol differently than someone whose family history is dominated by cancer, who "may think very differently." Your own risk picture — your family history, your medications, your health conditions — is part of the equation the population averages can't see.

The study did not arrive quietly, partly because of how it reached the public. It was commissioned to help shape the 2025–2030 Dietary Guidelines for Americans, and the scientists' report was released under the Biden administration in early 2025. Its specific conclusions, however, were not carried into the updated guidance. The January 2026 dietary guidelines dropped the long-standing "one or two drinks a day" language and now simply advise Americans to "consume less alcohol for better overall health," without a numeric cap. The team ultimately published its work independently.

The disagreement turned pointed. In an accompanying editorial, former federal official Robert Vincent argued the findings "are not radical. They are rigorous — and commercially threatening," while a House committee had earlier called the underlying report "irretrievably flawed." The Department of Health and Human Services defended its process, with spokesperson Emily Hilliard saying the guidelines are "informed by the totality of the scientific record, not any single report or analysis," and noting that the published paper differed from the earlier government draft.

There is also a genuine scientific debate underneath the political one, and it is worth being honest about it. A separate review led by the National Academies of Sciences, Engineering, and Medicine, which the administration leaned on, found moderate drinking associated with lower all-cause mortality — though it also found a higher breast cancer risk, and watchdogs criticized the panel for including members with financial ties to the alcohol industry. A June 2026 "burden of proof" analysis in Nature Health likewise found some reduced risks for certain cardiovascular conditions, type 2 diabetes, and dementias at low intake, while still tying even low levels to higher cancer and liver risks, and concluding that "current evidence does not support sex-specific thresholds." The throughline across these competing analyses is consistent even when the details differ: less is lower risk, and for cancer in particular, no clearly safe amount has been found.

The reassuring news is that nothing here demands a dramatic overhaul of your life by tonight. What the latest research offers is a clearer-eyed view of a familiar habit — fewer drinks mean lower risk, the long-assumed health halo around moderate drinking looks thinner than it once did, and the right number for any one person depends on factors only they and their doctor can fully weigh. That is information you can sit with, and use, on your own terms.