The only guaranteed way to prevent a hangover is to drink less alcohol, but several strategies can meaningfully reduce how rough you feel the next morning. The biggest levers you can pull are eating before you drink, pacing yourself, choosing your drinks carefully, and stopping early enough to let your body process the alcohol before bed. Here’s what the science actually supports.
Why Hangovers Happen in the First Place
A hangover isn’t just dehydration, despite what most people assume. When your liver breaks down alcohol, the process generates byproducts that trigger an immune response throughout your body. Your blood levels of inflammatory molecules rise in proportion to how much you drank, and the severity of that inflammatory response directly correlates with how bad you feel the next day. Think of it less like being dried out and more like your body fighting off a low-grade illness.
Alcohol also disrupts your sleep in a specific, predictable pattern. In the first half of the night, it pushes you into unusually deep sleep while suppressing the dreaming stage (REM sleep). Then in the second half, sleep falls apart. You wake up more often, sleep becomes lighter, and the REM sleep your brain missed never bounces back. That’s why you can sleep eight hours after drinking and still feel wrecked: the quality of those hours was fundamentally different from normal sleep.
Eat a Real Meal Before Drinking
This is the single most effective thing you can do besides drinking less. Eating before you drink slows the rate at which alcohol reaches your bloodstream, giving your liver more time to process it gradually rather than being overwhelmed all at once. In one study comparing fasted and fed states, peak blood alcohol levels after a meal were roughly half of what they were on an empty stomach, regardless of whether the meal was high in fat, protein, or carbohydrates. The time it took to fully clear alcohol from the blood also shortened by one to two hours when people had eaten.
The type of food matters less than having something substantial in your stomach. A protein-rich meal produced the lowest overall alcohol exposure in that study, but the differences between meal types were modest. The key is eating enough to slow gastric emptying. A handful of crackers won’t cut it. Aim for a full meal with some combination of protein, fat, and carbohydrates about an hour before your first drink.
Pace Yourself and Set a Cutoff Time
Hangover severity tracks closely with how high your blood alcohol concentration gets. That means the rate at which you drink matters almost as much as the total amount. Spacing your drinks out, aiming for roughly one per hour, keeps your liver from falling behind. Your body can metabolize about one standard drink per hour, so anything faster than that means alcohol is accumulating in your system.
Equally important is when you stop. Because alcohol wrecks the second half of your sleep, finishing your last drink two to three hours before bed gives your body time to start clearing alcohol before you fall asleep. The less alcohol still circulating when you hit the pillow, the less your sleep architecture gets disrupted, and the more functional you’ll feel in the morning.
Choose Lighter-Colored Drinks
Congeners are chemical byproducts of fermentation and aging that give dark spirits their color and flavor. They also appear to make hangovers worse. The differences in congener content between drink types are dramatic. Vodka contains between 0 and 170 milligrams per liter of methanol (the most studied congener), while brandy can contain up to 4,766 milligrams per liter. Whiskey and rum fall somewhere in between, with whiskey reaching up to 328 mg/L and rum up to 131 mg/L.
This doesn’t mean clear drinks are hangover-proof. Alcohol itself is the primary driver of hangover symptoms. But if you’re choosing between bourbon and vodka at the same quantity, the vodka will likely leave you feeling better the next day. White wine generally contains fewer congeners than red wine, and lighter beers fewer than dark ales, though the differences are less extreme than with spirits.
Water Helps Less Than You Think
Alternating water with alcohol is standard hangover advice, and it’s not bad advice, but its effect is more modest than most people believe. A review of the evidence found that water consumption during or after drinking had only a small effect on preventing next-day hangovers. Drinking water during a hangover didn’t meaningfully reduce symptom severity either. The researchers concluded that dehydration and hangovers are two separate consequences of drinking that happen to occur together.
That said, alcohol does act as a diuretic, causing your body to lose more water than it takes in. Staying hydrated won’t prevent the inflammatory and neurological aspects of a hangover, but it can reduce the thirst, dry mouth, and headache that come from fluid loss specifically. Think of water as addressing one piece of the puzzle rather than the whole thing. Having a glass between drinks is still worth doing; just don’t expect it to be a cure-all.
Skip “Hair of the Dog”
Drinking more alcohol the morning after does temporarily relieve hangover symptoms, but the mechanism reveals why it’s a terrible strategy. One contributor to hangovers is methanol, a trace alcohol present in many drinks. Your body converts methanol into formaldehyde and formic acid, both toxic. Ethanol (regular alcohol) competes with methanol for the same metabolic pathway, so drinking more ethanol blocks methanol breakdown and delays those toxic byproducts from forming. You feel better temporarily, but you’re just pushing the problem forward while adding more alcohol your body needs to process. You end up with a delayed, often worse hangover, or you start a cycle of drinking to avoid feeling bad.
What About Supplements?
The supplement market for hangover prevention is enormous, but the evidence behind most products is thin. Dihydromyricetin (DHM), derived from the Japanese raisin tree, is one of the more promising compounds being studied. It appears to support alcohol metabolism in animal studies, but as of the most recent clinical trial data, no controlled human studies have been published confirming its safety, optimal dose, or effectiveness for hangovers. Early-phase trials are testing doses between 300 and 900 milligrams, but it’s too soon to make recommendations.
Prickly pear extract has slightly better human data. One study published in a major medical journal tested it and found a reduction in some hangover symptoms, possibly through its anti-inflammatory effects. But the results were inconsistent across different symptoms, and no follow-up trials have firmly established it as reliable prevention.
B vitamins, zinc, and electrolyte supplements are widely marketed for hangovers. While heavy drinking can deplete certain nutrients over time, the acute diuretic effect of a single night of drinking primarily causes water loss rather than dramatic electrolyte depletion. Taking a multivitamin won’t hurt, but don’t expect it to counteract the inflammatory cascade that alcohol sets off.
The Strategies That Actually Add Up
No single trick eliminates hangovers, but stacking the approaches that have real evidence behind them makes a noticeable difference. Eat a substantial meal before drinking. Pace yourself to one drink per hour or slower. Lean toward lighter-colored spirits or drinks with fewer congeners. Stop drinking two to three hours before bed. Have some water along the way, knowing it addresses dehydration but not the full picture. And keep your total intake moderate, because the strongest predictor of hangover severity is simply how much alcohol you consumed.