News · Nutrition & Diet
Moderate drinking tracked lower heart risk and higher cancer risk in the same 438,442 people
The alcohol argument usually picks one disease and stops there. Following 438,442 US veterans, moderate drinking sat at the bottom of the curve for heart events and death, while cancer risk climbed in a straight line from the first drink.
- Moderate drinkers had the lowest heart risk and death rate, below non-drinkers.
- Cancer risk climbed in a straight line, with no dip at the bottom.
- Both patterns come from the same 438,442 people, which is what makes it useful.
- Smoking made the link between alcohol and head and neck cancer considerably worse.
- Abstainers include people who quit because they were ill, which flatters drinking.
The argument about whether a daily drink is good for you has run for thirty years, and most of it has been conducted one disease at a time. Cardiologists produce a curve that dips. Oncologists produce a line that climbs. Both are looking at different studies, so neither has to answer the other.
Writing in the American Journal of Clinical Nutrition, researchers put both questions to one population. Self-reported alcohol consumption was collected from 438,442 participants in the Million Veteran Program, and followed for cardiovascular events, cancer and death.
Previously each answer came from a different literature, which let anyone quote whichever suited them. They got both at once. A J-shaped association was observed between alcohol and risk of mortality, and alcohol consumption demonstrates a linear dose-response relationship with cancers.
Two shapes, one substance
The J is the famous one. Risk is higher among people drinking nothing, falls to a low point somewhere in the moderate range, and rises again as intake climbs. The same shape appeared here for death from any cause and for major cardiovascular events, defined as myocardial infarction, stroke, or cardiovascular death.
The line is the one that gets less attention. For cancer there was no dip at all: risk rose with the dose from the bottom of the range upward, with increased risks for alcohol-related cancers even at moderate consumption levels.
A person drinking a glass of wine a night is therefore sitting at the favorable point on one curve and an elevated point on the other, simultaneously, from the same behavior.
Why the same data can say both
There is no contradiction to resolve, which is the part most coverage gets wrong.
Alcohol does several things to a body and they do not point the same way. It raises HDL cholesterol and affects clotting, which is the usual explanation offered for the cardiovascular dip. It is also metabolized into acetaldehyde, which damages DNA directly, and that mechanism has no lower threshold to hide beneath.
One organ system can benefit while another is harmed, and the overall answer then depends on which disease a particular person is most likely to get. That is an uncomfortable kind of advice, because it cannot be reduced to a number of units.
The objection to the good half
The dip has never been fully trusted, and the reason sits inside the comparison group.
People who report drinking nothing are not all lifelong abstainers. They include people who stopped because of liver disease, because of medication, because of addiction, or because they were told to. Those people carry elevated risk that has nothing to do with their current abstinence, and grouping them with lifelong non-drinkers pushes the zero end of the curve upward.
That mechanism, usually called the sick-quitter effect, can manufacture a J out of a line. Whether it accounts for all of the dip, some of it, or none is the question the field has been arguing about for a decade, and a cohort this size does not settle it.
The cancer finding is not exposed to the same problem in the same way. A straight line rising from the bottom does not depend on who is at zero.
Where smoking comes in
One interaction was singled out. The alcohol and head and neck cancer association was significantly exacerbated by smoking.
Compounding rather than adding is the important word there. The two exposures reach the same tissues, and someone doing both is not carrying the sum of two risks but something larger. For head and neck cancer specifically, that combination has long been the dominant risk pattern, and this cohort reproduces it.
What it is honest to conclude
Not that moderate drinking is safe, and not that it is dangerous. That both statements are partly true, in different tissues, at the same dose.
For someone weighing it up, the useful question is which risks they already carry. A person with a strong family history of breast or bowel cancer is reading a different curve from someone with early heart disease, and the same glass means something different to each.
The standing public guidance does not need adjusting to fit any of this: drinking less is better for your health than drinking more, and that holds on both curves at once, because the line always rises and the J only helps in a narrow band.
What this study adds is the pairing. Having both answers from the same 438,442 people removes the last comfortable move in the argument, which was to cite whichever study suited the conclusion.
People also ask
What did the study find?
A J-shaped association was observed between alcohol and risk of mortality and major adverse cardiovascular events, with lower risk at moderate consumption than at abstinence or heavier drinking. Alcohol showed a linear dose-response relationship with cancers, with increased risks for alcohol-related cancers even at moderate consumption levels.
What is a J-shaped curve?
Risk that is higher at zero, falls to a low point at some middling exposure, then rises again as exposure increases. Plotted, it looks like the letter J. A straight line has no such dip: risk simply rises with the dose.
So is moderate drinking good or bad?
It depends which disease is being counted, which is the point of the paper. On this data the same amount of alcohol sits at the favorable end for heart events and at a raised level for cancer. There is no single answer that covers both.
Why do people distrust the J-curve?
Because the group at zero is not made up only of lifelong non-drinkers. It includes people who stopped because of illness, medication or addiction, and those people carry high risk for reasons that have nothing to do with abstaining. That inflates the apparent risk of not drinking.
Which cancers are alcohol-related?
The group usually includes mouth, throat, voicebox, esophagus, liver, colorectal and female breast cancer. The head and neck association here was significantly worsened by smoking, the two exposures compounding rather than simply adding.
How was drinking measured?
By self-report from participants. People underestimate their own drinking, which tends to shift heavy drinkers into lighter categories and can make the moderate group look worse than it is, or better, depending on which way the misreporting runs.
What should someone take from this?
That the honest summary is a trade rather than a verdict, and that the cancer side has no threshold below which risk stops rising. Guidance is that drinking less is better for your health than drinking more. This is general information rather than medical advice.
References
- Association of self-reported alcohol consumption versus abstention with major adverse cardiovascular events, cancer, and mortality among United States Veterans: a cohort study from the Million Veteran Program. American Journal of Clinical Nutrition, 2026.
- MedlinePlus. Alcohol. US National Library of Medicine.