Bad news, red wine drinkers: alcohol is only ever bad for your health | Devi Sridhar

To say yes to that glass of wine or beer, or just get a juice? That’s the question many people face when they’re at after-work drinks, relaxing on a Friday night, or at the supermarket thinking about what to pick up for the weekend. I’m not here to opine on the philosophy of drinking, and how much you should drink is a question only you can answer. But it’s worth highlighting the updated advice from key health authorities on alcohol. Perhaps it will swing you one way or the other.

It’s well-known that binge-drinking is harmful , but what about light to moderate drinking? In January 2023, the World Health Organization came out with a strong statement: there is no safe level of drinking for health. The agency highlighted that alcohol causes at least seven types of cancer, including breast cancer, and that ethanol (alcohol) directly causes cancer when our cells break it down.

Reviewing the current evidence, the WHO notes that no studies have shown any beneficial effects of drinking that would outweigh the harm it does to the body. A key WHO official noted that the only thing we can say for sure is that “the more you drink, the more harmful it is – or, in other words, the less you drink, the safer it is”. It makes little difference to your body, or your risk of cancer, whether you pay £5 or £500 for a bottle of wine. Alcohol is harmful in whatever form it comes in.

Related: Just how bad is alcohol for us? – podcast

Countries have started adopting this position in their national guidance. For example, in 2023, Canada introduced new national recommendations saying that abstinence is the only risk-free approach, and noting that two drinks (approximately four units) a week is low-risk. This was a change from 2011 when the guidance allowed a maximum of 10 drinks (about 20 units) and 15 drinks (about 30 units) for women and men respectively. The NHS has adopted the language of “no completely safe level of drinking”, with the guidance not to drink more than 14 units, or about six glasses of wine/pints of beer a week.

What about red wine? Wasn’t this supposed to be good for us? Two decades back, studies emerged that hinted that red wine could benefit the heart, especially as part of a Mediterranean diet. However, some of these studies didn’t control for the fact that red wine drinkers were more likely to be educated, wealthy, physically active, eat vegetables and have health insurance. In 2006, in a new analysis that controlled for health-affecting variables, the benefits of drinking red wine weren’t found. Since then, increasing evidence has shown that even one glass of wine a day increases the risk of high blood pressure and heart problems.

The alcohol industry has been savvy here and funded studies that – surprise, surprise – show the benefits of moderate drinking. This is a lesson in why you should always look at who funds the study, and whether there’s a conflict of interest. The muddying of studies by commercial interests (a tactic that was also famously used by the tobacco industry) led to statements, like from economist Emily Oster , that having one drink a day during pregnancy is safe. This has been debunked : foetal brain imaging in 2022 showed that even one alcoholic drink a week during pregnancy harms the baby’s developing brain.

Related: Why scientific support for alcohol’s health benefits is fading

To summarise, there’s widespread consensus that alcohol poisons our bodies. This isn’t a moral judgment: it is what large-scale epidemiological studies have shown. This should inform government policies such as health warnings on alcohol labels, bans on multi-buy promotions, restrictions on marketing and advertising, and greater awareness of the health risks of drinking. Yet, we have to be careful not to descend into puritanism. We live in a democracy where people have the freedom to drink and make choices about their health.

And I’ll admit that even though I work in public health, I continue to have a drink from time to time. Each day, we humans make decisions over the risks we take, and those of us who work in public health have to remember that not everyone is concerned only with living longer; feeling satisfied in how we live each day is also important. We eat that doughnut or bag of crisps, even though we know it’s not great for us, just as we drive long distances on motorways knowing there’s always the risk of a fatal traffic accident. And with alcohol, for many people there’s happiness in sharing a bottle of wine or grabbing a few pints with friends.

There’s no moral judgment in how people choose to live their life and the choices they make. But, yes, drinking carries a health risk, and it’s worth us, and governments, finally acknowledging this fact, even if we’d prefer not to think about it.

• Prof Devi Sridhar is chair of global public health at the University of Edinburgh