Is Red Wine Good for Your Heart?

You pour a glass of red with dinner and think, at least it's good for my heart. Maybe you heard it at a dinner party, or read it years ago, or a doctor once said a glass a day was fine. It is one of the most comforting health stories around.

Here is where the idea came from, why the early studies pointed the wrong way, and what research says now.

Where the idea came from

In 1992 two French researchers published a paper in The Lancet on what became known as the French paradox. People in France ate plenty of saturated fat, yet fewer of them died of heart disease than in many other countries. The authors suggested that wine was part of the reason. They cited studies in which drinking at French levels, 20 to 30 grams of alcohol a day, went with a lower risk of heart disease, and proposed that alcohol made blood platelets less sticky.

Large observational studies seemed to agree. When researchers plotted alcohol intake against deaths from heart disease, moderate drinkers often came out ahead of people who didn't drink at all.

The trouble with the non-drinkers

The comparison depends on who counts as a non-drinker, and that is where the early studies went wrong. Some people stop drinking because they are already ill. If they are counted as non-drinkers, the non-drinking group looks sicker, and drinking looks protective.

A British study of 7,735 middle-aged men showed this as early as 1988. The apparent benefit of drinking appeared only among men who already had heart-related illness when the study began. The authors concluded that pre-existing disease, and ill men moving into the non-drinking group, produced the pattern. In the same study, 70% of the non-drinkers turned out to be former drinkers.

Moderate drinkers were healthier to begin with

The second problem is that moderate drinkers differ from non-drinkers in many ways besides alcohol. A US survey analysis looked at 30 factors linked to heart disease, from social background and behaviour to access to health care. Twenty-seven of them were more common among non-drinkers.

A 2022 study of 371,463 people in the UK Biobank found the same thing. Light and moderate drinkers had healthier lifestyles overall, and adjusting for that weakened the apparent heart benefit. The researchers then used genetic data, which is less affected by lifestyle. By that method, alcohol at every level went with higher heart risk. The extra risk was small at light intake and rose steeply with heavier drinking.

What newer research says

A 2023 analysis pooled 107 studies with more than 4.8 million people. Once the researchers corrected for former drinkers counted as non-drinkers, and for weaker study designs, low-volume drinkers had no significantly lower risk of death than people who had never drunk. Risk rose at higher intakes, and it started rising at lower levels for women than for men.

The American Heart Association's 2025 scientific statement is more cautious than the old headlines. It notes that most of the research is observational and open to bias. For one to two drinks a day, the evidence ranges from no extra risk to a possible reduction for coronary heart disease and stroke. The effect of that amount on atrial fibrillation is unknown. Heavier drinking, binge drinking or three or more drinks a day on average, was linked to worse outcomes in every kind of heart disease studied. The statement concludes that it remains unknown whether drinking belongs in a healthy lifestyle.

The World Health Organization adds a point the heart studies miss. Even if a small protective effect exists for some heart conditions, no study shows that it lowers the cancer risk for the person drinking. In WHO's view, no safe amount of alcohol can be set. Our article on alcohol, the liver, the heart and cancer covers those risks.

What about resveratrol?

Resveratrol, a compound found in grapes, is often given as the reason red wine in particular should help. The amounts tell a different story. A 2016 review in Advances in Nutrition lists red wines at about 0.36 to 1.97 mg of resveratrol per litre. Doses proposed for treatment run from hundreds of milligrams to several grams a day. At around 2 mg per litre, a 1-gram daily dose would take about 500 litres of red wine a day.

The review also worked out what French drinkers got from their wine: about 0.2 mg of resveratrol a day, some 5,000 times less than a 1-gram dose. And when researchers followed 783 older adults in Italy's Chianti region for nine years, the resveratrol levels they got from their normal diet had no link with heart disease, cancer, inflammation or death.

The heart rhythm and blood pressure problem

Two heart problems show harm even at modest intake, and red wine is no exception. In a study that followed 107,845 Europeans for about 14 years, one drink of 12 grams a day went with a 16% higher risk of atrial fibrillation, an irregular heart rhythm. The link was similar for different types of alcohol.

A trial in Australia tested the reverse. It took 140 regular drinkers with atrial fibrillation and asked half of them to stop drinking. Over six months the rhythm problem came back in 53% of the group who abstained, against 73% of those who kept drinking, and the abstaining group spent less time in an irregular rhythm.

Blood pressure follows the same pattern. A 2023 analysis of cohort studies found systolic pressure rose steadily with daily intake, about 1.25 mmHg higher at 12 grams a day and 4.9 mmHg at 48 grams, with no sign of a threshold. The good news runs the other way too. In trials, people drinking more than two drinks a day who cut down saw their blood pressure fall. Those drinking six or more a day who halved their intake saw systolic pressure drop by about 5.5 mmHg.

What this means for your glass

If you drink red wine because you like it, that is your choice to make. It just doesn't belong in the heart-health column. The American Heart Association points doctors to other habits instead: regular exercise, avoiding tobacco and keeping a healthy weight.

If you already live with high blood pressure or atrial fibrillation, drinking less has trial evidence behind it, and it is worth raising with your doctor. A glass at home is also often bigger than you think, so it helps to know what counts as one drink.

If you decide to cut back, you don't have to stop all at once. If you drink heavily every day, stopping suddenly can be dangerous. Talk to a doctor first.