How to Avoid Hangovers: 7 Evidence-Based Tips

Hangover severity tracks most closely with how much you drink and how drunk you feel, so the single most reliable prevention strategy is simply drinking less. Beyond that obvious starting point, research does offer a handful of approaches that genuinely influence how rough you feel the next morning. Most of them work by slowing alcohol absorption, reducing the inflammatory response alcohol triggers, or avoiding substances that compound the damage. What the research does not support, despite a booming market, is the idea that any pill, powder, or proprietary blend can reliably neutralize a hangover after the fact.

1. Eat a Substantial Meal Before Drinking

Food in the stomach slows the rate at which alcohol enters the bloodstream, and a lower peak blood alcohol level translates directly to a milder hangover. A controlled study found that a high-carbohydrate meal reduced peak blood alcohol concentration and levels measured two hours after drinking, compared to drinking on an empty stomach.¹ Interestingly, a high-protein meal did not produce the same effect, suggesting that starchy and carb-rich foods are the better pre-drinking choice. The mechanism is straightforward: food delays gastric emptying, which means alcohol trickles into your small intestine more slowly rather than flooding it all at once. A plate of pasta or rice before heading out is one of the most practical and well-supported things you can do.

2. Drink Less, and Pay Attention to How Drunk You Feel

This sounds like non-advice, but the science behind it is more nuanced than “just stop sooner.” Research confirms a direct relationship between blood ethanol concentration and hangover severity, and faster clearance of ethanol from the body is associated with milder hangovers.² But an interesting wrinkle emerged from more recent work: your subjective sense of drunkenness appears to predict hangover severity more reliably than your actual blood alcohol concentration.³ In other words, if you feel very drunk, you are setting yourself up for a rough morning regardless of whether a breathalyzer would agree. Paying attention to that internal signal and slowing down when you notice it is a genuinely evidence-based strategy. There is no safe threshold below which hangovers become impossible; some people report hangovers at surprisingly low estimated blood alcohol levels.

3. Choose Low-Congener Drinks

Congeners are biologically active compounds produced during fermentation and aging. They include substances like methanol, acetone, and various aldehydes, and they tend to concentrate in darker, barrel-aged spirits. A controlled crossover study compared bourbon (a high-congener spirit) with vodka (a low-congener spirit) at the same intoxicating dose and found that hangover severity was significantly worse after bourbon, even though sleep quality and next-day cognitive performance were similar in both conditions.⁴ This does not mean vodka is hangover-proof. Both alcohol conditions produced worse hangovers than placebo. But all else being equal, lighter spirits, white wines, and lighter beers tend to contain fewer congeners than whiskey, brandy, red wine, and dark beer.

The congener effect also helps explain why cheap spirits sometimes earn their bad reputation. Lower-quality distillation processes can leave behind more of these byproducts. If you are choosing between two options at a similar price, the clearer one is the safer bet for the next morning.

4. Skip the Carbonated Mixers

Champagne hangovers are not just folklore. A study measuring alcohol absorption rates found that carbonated mixers sped up alcohol absorption in two-thirds of participants, and the average absorption rate with a carbonated mixer was substantially faster than with a still one.⁵ Faster absorption means a higher, sharper peak in blood alcohol, which, as established, tracks directly with hangover severity. Not everyone responded the same way in the study, and about a third showed no change or a slight decrease in absorption rate. But on average, carbonation pushes alcohol into your bloodstream faster. Mixing spirits with still water or non-carbonated juice avoids the issue entirely.

5. Make Sure Your Diet Includes Zinc and Niacin

This tip is less about what you do on the night of drinking and more about your baseline nutritional status. A study examining dietary intake in the 24 hours before and after a drinking session found that people with higher dietary intake of nicotinic acid (a form of niacin, or vitamin B3) and zinc reported significantly less severe hangovers.⁶ Zinc intake was also negatively associated with the severity of vomiting. Both nutrients play roles in alcohol metabolism. Zinc is a cofactor for the enzyme that breaks down alcohol, and niacin is involved in the metabolic pathway that processes its byproducts. Good dietary sources of zinc include meat, shellfish, legumes, and seeds. Niacin is found in poultry, fish, peanuts, and fortified grains.

This finding is observational rather than experimental, so it does not prove that popping zinc tablets the night of a party will help. But it does suggest that a well-nourished body handles alcohol metabolism more efficiently, which aligns with the broader principle that faster ethanol clearance means milder hangovers.

6. Do Not Count on Water to Save You

The advice to alternate alcoholic drinks with water is nearly universal, and it sounds logical given that alcohol increases urine output and dehydration is often assumed to be the core driver of hangovers.⁷ The problem is that research specifically testing this idea found that water consumption during or after drinking had only a modest effect on preventing next-day hangover symptoms. And drinking water during a hangover the next morning was not related to any reduction in hangover severity or thirst.⁸

This does not mean hydration is worthless. Dehydration contributes to some symptoms like dry mouth and thirst, and replacing fluids is never a bad idea. But the hangover itself is driven more by inflammation, oxidative stress, and disrupted sleep than by simple fluid loss. Hangover severity correlates strongly with inflammatory markers like IL-6, TNF-alpha, and C-reactive protein, all of which rise in direct response to ethanol itself.⁹ Water does not neutralize that inflammatory cascade. The takeaway: stay hydrated because it is generally healthy and may ease some discomfort, but do not rely on it as your primary hangover prevention strategy.

7. Be Skeptical of Hangover Cure Products

The market for commercial hangover remedies is enormous, with products ranging from vitamin packets and electrolyte powders to herbal capsules and IV drip bars. A systematic review evaluated 82 commercially available hangover products and found no peer-reviewed human data demonstrating either safety or efficacy for any of them.¹⁰ A randomized controlled trial specifically testing a supplement containing vitamins, minerals, and additional antioxidant compounds found no statistically significant improvement in hangover symptoms compared to placebo.¹¹

One partial exception worth mentioning is prickly pear cactus extract (Opuntia ficus-indica). A randomized placebo-controlled trial found that taking the extract five hours before drinking reduced the risk of a severe hangover by about half, with specific improvements in nausea, dry mouth, and loss of appetite. The researchers observed that C-reactive protein levels, a marker of inflammation, were roughly 40 percent higher in participants who took placebo compared to the extract group, suggesting the benefit comes from an anti-inflammatory effect.¹² The overall hangover severity score improvement was moderate and did not quite reach statistical significance for the total index, so this is promising rather than definitive. And it is worth noting that this extract was given well before drinking, not popped the morning after.

Why Hangovers Are Really an Inflammatory Problem

Understanding what actually drives a hangover helps explain why so many folk remedies fail. For years, dehydration and acetaldehyde buildup were assumed to be the main culprits. The evidence has shifted. Research now shows that blood ethanol concentration, not acetaldehyde concentration, is what correlates with hangover severity, likely because ethanol itself crosses into the brain while acetaldehyde largely does not.² Ethanol directly triggers an immune response: levels of inflammatory cytokines in both blood and saliva rise significantly after heavy drinking.¹³

On top of the inflammation, alcohol metabolism itself generates oxidative stress. Processing ethanol uses up oxygen in tissues and generates free radicals that damage cell membranes and proteins. Congeners, poor sleep, and the activation of certain metabolic enzymes in the liver all pile onto this oxidative burden.¹⁴ A hangover is your body dealing with widespread low-grade tissue irritation, disrupted sleep architecture, gastrointestinal upset, and a temporarily dysregulated immune response all at the same time. No single remedy addresses all of those pathways, which is why the prevention strategies that actually work tend to be about reducing the insult in the first place rather than patching it up afterward.

A Warning About Painkillers and Alcohol

Many people reach for ibuprofen or acetaminophen either before bed or the morning after to blunt a headache. Both carry risks that are worth knowing about. Laboratory research has shown that ibuprofen and ethanol together produce synergistic liver toxicity, meaning the damage from the combination is greater than what you would expect from either substance alone, driven by increased production of free radicals.¹⁵ Acetaminophen (Tylenol) is also metabolized in the liver and is well known to become more hepatotoxic when combined with alcohol. The prudent approach, if you need a painkiller during a hangover, is to wait until alcohol has been fully cleared from your system and to use the lowest effective dose. For many people, that means the ibuprofen they took at 2 a.m. was timed at the worst possible moment.

Why Some People Get Worse Hangovers Than Others

If you have ever noticed that your friends seem to bounce back from the same amount of drinking while you are flattened, there are real biological explanations. Sex, age, and genetics all play measurable roles.

Women generally reach higher blood alcohol concentrations than men after consuming the same amount of alcohol, even at the same body weight, because women on average carry more body fat and less water, and alcohol distributes through body water.¹⁶ Higher blood alcohol means more fuel for the inflammatory and oxidative cascade that produces hangover symptoms.

Age has a counterintuitive effect. Contrary to the common complaint that hangovers get worse as you age, survey data consistently show the opposite. The odds of experiencing a severe hangover after a binge-drinking episode decline steadily with age: in one large study, men aged 18 to 29 had more than six times the odds of a severe hangover compared to men over 60, even after controlling for how much they typically drank and how often they binged.¹⁷ A separate analysis confirmed that both subjective intoxication and hangover severity decline with age, possibly reflecting a form of tolerance that develops over years of exposure.¹⁸ The reason many older people feel that hangovers have gotten worse is likely that they drink less often, so each episode feels more punishing relative to their usual baseline.

Genetics matter too, particularly the enzymes responsible for breaking down alcohol. People of East Asian descent who carry a variant of the ALDH2 gene (which encodes the enzyme that processes acetaldehyde) tend to experience more severe hangovers. A study of Asian Americans found that the ALDH2*2 allele accounted for a significant additional portion of hangover severity beyond what gender and recent drinking history could explain.¹⁹ This variant slows acetaldehyde breakdown, leading to a buildup that causes flushing, nausea, and headache. The researchers noted that the more severe hangover experience in these individuals may actually serve a protective function by discouraging heavy drinking.

Measuring Hangovers Is Harder Than You Think

Part of the reason hangover science has been slow to produce definitive cures is that measuring a hangover is surprisingly tricky. Researchers have developed several multi-item symptom scales, but these scales tend to systematically underestimate how bad people actually feel. A study comparing different measurement approaches found that a simple one-item question (“how bad is your hangover on a scale of 0 to 10?”) captured overall severity better than longer checklists of individual symptoms.²⁰ The reason is that symptom scales only capture the symptoms they ask about. If someone’s hangover manifests primarily as brain fog, regret, and a general sense of malaise rather than the specific symptoms on the list, the scale misses it. This measurement problem has likely contributed to inconsistent results in clinical trials of hangover remedies: if you cannot accurately measure what you are trying to treat, it is hard to prove that a treatment works.

The broader point for anyone evaluating hangover products is that the research landscape is less mature than it might seem. Controlled trials are few, and the ones that exist have often used different doses, different measurement tools, and different timing protocols. When a supplement brand claims clinical backing, ask whether the study was placebo-controlled, whether it used a validated severity measure, and whether anyone besides the company that sells the product was involved in the research. The answer, more often than not, is disappointing.¹⁰

The Role of Sleep Disruption

Alcohol is one of the most commonly used sleep aids in the world, and it is also one of the worst. It helps you fall asleep faster but fragments the second half of the night, suppressing REM sleep and increasing nighttime awakenings. Research has identified disrupted sleep and altered biological rhythms as direct contributors to hangover symptoms.⁷ The fatigue, poor concentration, and irritability people attribute entirely to “the hangover” are partly sleep-deprivation effects layered on top of the metabolic and inflammatory processes.

This matters practically because it means that two people who drink the same amount can feel very different the next day depending on how much sleep they got. Going to bed at midnight after stopping drinking at 10 p.m. gives your body several more hours to metabolize alcohol before you fall asleep, resulting in less disrupted rest than staying out until 3 a.m. and collapsing immediately. Building in that buffer between your last drink and bedtime is one of the simplest adjustments you can make, and few people think of it as a hangover prevention strategy.