Does alcohol make you gain weight or stall fat loss?

The picture is more nuanced than the folklore. Alcohol contains just over 7 kcal per gram, almost as much as pure fat, and those calories count. Yeomans's review points to the core problem: the energy from alcohol is added on top of ordinary food rather than replacing it. The body rarely recognises a drink as food, so you eat about the same amount anyway. Drinking before or with a meal also tends to make you eat more, because alcohol both lowers restraint and makes food more rewarding in the moment.

Suter describes a second mechanism: while the body burns the alcohol it pauses fat burning, so the fat you have eaten is stored rather than used, and some of it settles around the abdomen. That is the physiological core of the 'beer belly'.

But the step from there to 'alcohol makes you fat' does not hold cleanly. Traversy and Chaput summarise the more recent population studies: light-to-moderate drinking is not clearly linked to weight gain, while heavy and binge drinking are more consistently linked to it. Part of the explanation is that moderate drinkers often live more healthily in other ways, which muddies the association.

The conclusion for someone who wants to lose weight is simpler than the research. Alcohol does not create fat out of nothing, but the calories are real, they fill you up poorly and they slow fat burning. That makes a deficit harder to hold, not impossible.

Alcohol's calories are easy to miss. They're liquid, social and rarely counted as a 'meal', so the brain never counts them. At the same time drinking lowers restraint, and it's often the food afterwards, not the glass, that makes the biggest difference. The 'beer belly' is convenient in another way: it names a single scapegoat organ and lets you keep the drinks while the blame goes to some mysterious metabolism. The incentives pull the same way. The drinks industry benefits when the calories stay invisible, and 'light' or 'skinny' versions sell the idea that the drink itself is the fix while the food around it goes uncounted.

You don't have to stop drinking to lose weight, but count the calories. An evening with a few beers or glasses of wine can easily eat up the day's deficit, and the food that often comes with it adds even more on top. Plan the drinks the way you plan food, keep track of how much they add up to, and pay extra attention to late-evening eating. If you want to see how much room you actually have, calculate your deficit.