The most effective way to reduce the effects of alcohol is to slow its absorption before and during drinking, stay hydrated, and make smarter choices about what and how much you consume. Your body processes alcohol at a relatively fixed rate, so most strategies work by either lowering your peak blood alcohol level or minimizing the collateral damage alcohol does to your sleep, hydration, and nutrient stores.
Eat Before You Drink
Food in your stomach is the single biggest factor in how quickly alcohol hits your bloodstream. When you drink on an empty stomach, alcohol passes rapidly into the small intestine where it’s absorbed almost immediately. A meal slows that process by keeping alcohol in the stomach longer, giving your body more time to begin breaking it down before it floods your blood.
Not all meals are equal here. In a study of 51 men, a high-carbohydrate meal significantly reduced peak blood alcohol levels and kept levels lower even two hours after drinking. Interestingly, a high-protein meal showed no significant effect on blood alcohol compared to fasting. That doesn’t mean protein is useless (fat and protein both slow stomach emptying in general), but carbohydrate-rich foods appear to have a distinct advantage when it comes to blunting the spike. A plate of pasta, rice, or bread before going out is a simple and effective buffer.
How Your Body Processes Alcohol
Your liver does almost all the work. It uses two enzymes in sequence: the first converts alcohol into a toxic intermediate called acetaldehyde, and the second quickly converts acetaldehyde into harmless acetate, which your body uses for energy. A secondary system handles a small additional fraction, and this system becomes more active with heavy or frequent drinking.
The key limitation is that these enzymes work at a roughly fixed speed. There’s no supplement, food, or trick that meaningfully accelerates this process. If you’ve consumed more alcohol than your liver can handle in a given hour, the excess circulates in your blood, reaching your brain and every other organ. This is why pacing matters more than almost any other strategy.
Pace Your Drinks and Alternate With Water
Alcohol suppresses your body’s production of vasopressin, a hormone that tells your kidneys to retain water. With vasopressin suppressed, your kidneys let far more fluid pass into your bladder than normal. One older estimate suggested roughly 100 mL of extra urine output for every 10 grams of alcohol consumed, though the exact ratio varies between people. The practical result is that a night of drinking can leave you significantly dehydrated, which contributes to headache, fatigue, and nausea the next day.
Alternating each alcoholic drink with a glass of water does two things: it directly replaces some of the fluid you’re losing, and it naturally slows down your drinking pace, giving your liver more time to keep up. Drinking a large glass of water before bed helps, but it works better as a supplement to hydrating throughout the night rather than a last-ditch effort.
Choose Lower-Congener Drinks
Congeners are chemical byproducts of fermentation and aging. They include compounds like acetone, tannins, and fusel oils, and they vary enormously between drinks. Bourbon contains roughly 37 times the congener content of vodka. In a controlled study comparing the two, people who drank bourbon reported significantly worse hangovers than those who drank vodka at the same alcohol dose. Sleep quality and next-day drowsiness were also worse with bourbon.
The main driver of hangover symptoms is still alcohol itself, but congeners clearly amplify the misery. As a general rule, darker spirits (bourbon, whiskey, brandy, dark rum) are high in congeners, while lighter ones (vodka, gin, white rum) are low. Clear mixers are better than sugary ones for similar reasons: excess sugar can worsen dehydration and inflammation.
Why Coffee Won’t Help
Caffeine makes you feel less drunk without actually reducing your blood alcohol level. In one study, people who consumed the equivalent of about 2.75 energy drinks’ worth of caffeine rated their intoxication lower than those who didn’t, but their actual impairment was unchanged. Worse, caffeine reversed the natural decline in desire to keep drinking. People without caffeine naturally wanted to stop as the session went on, while those who had caffeine maintained their desire to continue.
This is a dangerous combination. Caffeine masks the internal signals your body uses to tell you you’ve had enough, making it easier to drink past the point where your judgment and coordination are seriously impaired. Coffee after a night out won’t speed up sobering, and mixing energy drinks with alcohol during the night increases the risk of overconsumption.
How Alcohol Disrupts Your Sleep
Alcohol’s effect on sleep is deceptive. At any dose, it helps you fall asleep faster and produces a deeper, more consolidated first half of sleep. This is why a nightcap feels effective. But the second half of the night tells a different story: sleep becomes fragmented, with more awakenings and restlessness.
The most consistent effect across studies is a significant delay in when your first dream-sleep period begins, regardless of how much you drink. At moderate to high doses, the total amount of dream sleep you get through the night drops as well. Dream sleep is critical for memory consolidation, emotional processing, and feeling restored the next morning. This is why you can sleep eight hours after drinking and still wake up feeling exhausted. Stopping alcohol intake at least three to four hours before bed gives your body time to metabolize much of it, reducing the disruption to your later sleep cycles.
Protect Your B-Vitamin Levels
Alcohol depletes B-vitamins, especially thiamine (B1), through multiple pathways. It damages the intestinal lining and directly inhibits the transport mechanism that absorbs thiamine from food. On top of that, people who drink heavily tend to eat poorly, often favoring carbohydrate-heavy foods that are low in vitamins. This creates a vicious cycle, because breaking down those carbohydrates itself requires thiamine, further depleting already low stores.
Thiamine is essential for brain cell metabolism. Severe deficiency can cause cognitive problems and brain damage, though this is primarily a concern with chronic heavy drinking rather than occasional use. For the average person looking to reduce alcohol’s effects after a night out, eating a balanced meal the next day and considering a B-complex supplement is a reasonable approach. Foods rich in thiamine include whole grains, pork, legumes, and fortified cereals.
Supplements: What the Evidence Actually Shows
Dihydromyricetin (DHM), extracted from the Japanese raisin tree, is the most studied compound marketed for reducing alcohol’s effects. In laboratory research published in The Journal of Neuroscience, DHM blocked alcohol’s ability to amplify signaling at the brain’s main inhibitory receptors, which are the same receptors responsible for the sedation, loss of coordination, and impaired judgment you experience while intoxicated. DHM appeared to counteract both the acute effects of alcohol and some of the neurological changes that occur during withdrawal.
These findings are from animal and cell-based studies, not large human clinical trials. The mechanism is promising, and DHM is widely available as a supplement, but the leap from lab results to reliable real-world hangover prevention hasn’t been firmly established. It’s not a substitute for drinking less or eating beforehand.
The Strategies That Matter Most
If you distill all of this down to what actually works in practice, the highest-impact steps are straightforward. Eat a carbohydrate-rich meal before drinking. Pace yourself to one drink per hour or slower, alternating with water. Choose lighter-colored, lower-congener beverages. Stop drinking several hours before you plan to sleep. And ignore the temptation to use caffeine as a countermeasure, since it only masks impairment while encouraging you to drink more.
None of these strategies eliminate alcohol’s effects entirely. Your liver sets the pace, and no food, supplement, or trick overrides that biological limit. But taken together, these approaches meaningfully reduce how bad you feel during and after drinking by keeping your blood alcohol lower, your hydration better, and your sleep less disrupted.