The most reliable way to avoid a hangover is to drink less, but that’s not the answer most people are looking for. The good news is that several evidence-backed strategies can dramatically reduce how rough you feel the next morning, from what you eat before drinking to which drinks you choose to when you stop.
Why Hangovers Happen in the First Place
Understanding the basics helps explain why certain prevention strategies work. When you drink, your liver converts ethanol into a toxic compound called acetaldehyde, then breaks that down further into harmless acetate (which becomes water and carbon dioxide). The problem is that heavy drinking overwhelms this process, letting acetaldehyde build up in your system. Elevated acetaldehyde levels are linked to most classic hangover symptoms: headache, nausea, facial flushing, dry mouth, and increased heart rate.
Alcohol also triggers a body-wide inflammatory response. Levels of inflammatory markers rise in your blood, saliva, and urine during a hangover. Through the gut-brain axis, this inflammation reaches your brain and contributes to the cognitive symptoms of a hangover, like poor mood, brain fog, and memory issues. On top of all that, alcohol acts as a diuretic, depleting key minerals like magnesium, potassium, and phosphorus through increased urination and poor absorption.
Eat a Real Meal Before You Drink
This is the single most effective thing you can do. Food in your stomach slows gastric emptying, meaning alcohol reaches your small intestine and liver at a more manageable pace instead of flooding your system all at once. The result is a lower and delayed peak blood alcohol level, giving your liver more time to process each round of acetaldehyde before the next wave hits.
A study published in The Journal of Clinical Pharmacology found that eating a meal before drinking increased alcohol elimination rates by an average of 45%. Interestingly, it didn’t matter whether the meal was high in fat, protein, or carbohydrates. All three performed similarly. So don’t overthink what you eat. A substantial meal of any kind, whether it’s pasta, a burger, or rice and beans, does the job. The key is volume and timing: eat enough to actually fill your stomach, and do it before your first drink rather than grabbing pizza at 2 a.m.
Choose Lower-Congener Drinks
Congeners are chemical byproducts of fermentation and aging. They give dark spirits their color and flavor, but they also make hangovers worse because your liver has to process them alongside the alcohol itself.
Drinks ranked from most to fewest congeners:
- High congeners: brandy, red wine, rum
- Medium congeners: whiskey, white wine, gin
- Low congeners: vodka, beer
The differences are not subtle. Brandy contains up to 4,766 milligrams per liter of methanol (a particularly nasty congener), while beer has just 27 milligrams per liter. Rum packs up to 3,633 milligrams per liter of another congener called 1-propanol; vodka contains anywhere from zero to 102. If you’re trying to minimize next-day misery, clear spirits mixed with simple ingredients are your best bet. This doesn’t make them hangover-proof, but it removes one significant contributor.
Match Every Drink With Water
Alternating alcoholic drinks with water works on multiple levels. It slows your overall pace of consumption, counteracts alcohol’s dehydrating effect, and dilutes the alcohol reaching your stomach. A practical target is one full glass of water (about 8 ounces) for every alcoholic drink. This also naturally spaces out your drinks, which gives your liver more processing time between rounds.
Beyond water, consider drinks that contain electrolytes, especially if you’re drinking over several hours. Alcohol depletes magnesium, potassium, and phosphorus through increased urination. A sports drink, coconut water, or even a salty snack between rounds can help offset some of those losses. Rehydrating before bed matters too, but front-loading your water intake throughout the night is far more effective than chugging a bottle right before sleep.
Stop Drinking Early Enough to Protect Sleep
Hangover severity has as much to do with sleep quality as with what you drank. Alcohol disrupts the deeper, more restorative stages of sleep. You may fall asleep faster, but you’ll wake up more often in the second half of the night and get far less REM sleep, the phase critical for feeling mentally sharp the next day.
MD Anderson Cancer Center recommends finishing your last drink at least 3 to 4 hours before bedtime. This gives your body time to metabolize a significant portion of the alcohol before you try to sleep. If you’re out until midnight and plan to sleep at 1 a.m., that last call should really be around 9 or 10 p.m. For most people, this is the hardest advice to follow, but it makes one of the biggest differences. Once you’ve already gone to bed with alcohol in your system, there’s not much you can do to salvage sleep quality.
Pace Yourself to One Drink Per Hour
Your liver processes roughly one standard drink per hour. A standard drink is 12 ounces of beer, 5 ounces of wine, or 1.5 ounces of spirits. Anything faster than that pace and acetaldehyde starts accumulating, triggering the inflammatory cascade that leads to hangover symptoms. Two drinks in the first hour followed by one per hour after that is a common real-world pattern, but even that front-loading can set you up for a rougher morning.
Pacing also lets you actually gauge how you feel as you go. Alcohol’s effects lag behind consumption by 15 to 30 minutes, so if you’re drinking quickly, you won’t realize you’ve overdone it until it’s too late.
What About Hangover Supplements?
The supplement market is flooded with products claiming to prevent or cure hangovers. In 2020, the FDA sent warning letters to seven companies selling such products, stating that they were marketing unapproved drugs without evidence that they were safe or effective. No supplement has FDA approval for hangover prevention or treatment.
One compound that gets a lot of attention is dihydromyricetin (DHM), a flavonoid extracted from the Japanese raisin tree. Animal studies have shown promise, but human clinical trials are still in early stages. A Phase 1 trial is testing basic safety and dosing in healthy volunteers, meaning researchers haven’t yet confirmed whether DHM works for hangover prevention in people, let alone at what dose. Other popular supplements like B vitamins, milk thistle, and prickly pear have similarly thin evidence in humans.
This doesn’t mean every supplement is useless, but it does mean you shouldn’t rely on a pill to cancel out a night of heavy drinking. The strategies with the strongest evidence are all behavioral: eating beforehand, hydrating throughout, choosing lighter-colored drinks, pacing yourself, and stopping early enough to get decent sleep. Those five things, used together, are far more effective than anything you can buy in a bottle.