How alternating booze and water prevents intoxication

HostEveryone has that one friend who swears by the one for one rule. You have a beer, then you have a glass of water, and somehow you're supposed to wake up feeling fresh as a daisy. I have always wondered if there's actual science behind that or if it's just a clever way to make the night last longer. So, does that glass of water actually do anything to the alcohol in your system?

GuestIt's a bit of a letdown, but no, it doesn't touch the alcohol itself. Once that beer is in you, it's on a one-way trip to your blood. Adding water is like putting more cars on a highway. It might change the scenery, but it doesn't change how fast the cars are going. The biggest reason it works is way simpler than people think. You're just drinking less. If you spend twenty minutes sipping a tall glass of water, that's twenty minutes where you're not sipping another gin and tonic. You're basically tricking yourself into a slower pace.

HostWait, I have heard for years that water dilutes the booze. If the alcohol is more watered down in my stomach, it seems like it should hit my system a lot slower.

GuestThat sounds right, but your stomach isn't where the real work happens. Alcohol doesn't need to be chewed up or broken down like a piece of steak. It just slips right through the lining of your stomach and your small intestine. It's very small and moves fast. While having a big meal in your belly can slow that down because the food acts like a sponge, a splash of water doesn't really act as a wall. The real bottleneck is your liver. Think of your liver like a tiny, very slow factory. It has one conveyor belt, and that belt only moves at one speed. It can only process about one normal drink every hour. If you drink three beers and three waters, your liver is still dealing with those three beers at the same slow, steady crawl. The water is just extra cargo.

HostSo if it's not changing how drunk I feel in the moment, why does everyone say it prevents a hangover? Is that part a lie too?

GuestThat part is actually true, but it's about the morning after, not the night of. Alcohol is a major water-waster. Usually, your brain sends out a constant signal to your kidneys saying, hey, keep some water in the tank, don't let it all out. Alcohol blocks that signal. It's like the brain falls asleep at the switch. So your kidneys just go into overdrive and send everything to your bladder. That's why you end up running to the bathroom every twenty minutes. You're losing way more liquid than you're taking in.

HostSo I'm basically just leaking water faster than I can put it in.

GuestYou're drying out from the inside. That's where the headache and the dry mouth come from the next morning. When you get really dried out, your brain can actually shrink a tiny bit because it's so thirsty. It pulls away from the skull, and that hurts. When you drink that glass of water between rounds, you're just trying to keep the tank from hitting empty. You're replacing what the alcohol is forcing you to lose. It won't make you less drunk, but it might make you less miserable when the sun comes up because your brain stayed the right size.

HostI'm having a hard time picturing my brain actually shrinking in my head. That sounds a bit like a scary story parents tell to keep kids from drinking. Is that a real thing that happens every time?

GuestIt sounds wild, but it's real. It's not like it turns into a raisin, but there's a measurable change in volume. Your body needs water to keep everything cushioned and floating. When you lose that cushion, everything feels tighter and more sore. Now, some people think they can beat this by just drinking a huge jug of water right before they go to bed, but by then, the damage is mostly done. You have already been losing water for five hours. Your body can only soak up so much at once. The rest just goes right through you. That's why the alternating thing is so much better. You're drip-feeding the water back in as you lose it.

HostBut what if I just drink low-strength stuff? If I'm drinking a light beer that's mostly water anyway, does that count as my water for the round?

GuestNot really. The alcohol in that beer is still going to trigger that signal to dump water. Even if the beer is weak, it's still telling your body to get rid of more liquid than the beer itself provides. You're still ending up in a hole. You need pure water to actually get back to even. And there's one other thing. Water in the stomach can actually make the alcohol move into your small intestine faster if your stomach gets too full. The small intestine is where alcohol gets into your blood the fastest. So if you chug a giant bottle of water on top of a shot of whiskey, you might actually be pushing that whiskey into your blood quicker.

HostThat's the opposite of what everyone wants. It sounds like the one for one rule is just a giant game of slow-motion.

GuestIt really is. It's the ultimate pacing tool. If you follow it, you're cutting your total booze for the night in half. If you would've had six drinks, now you have had three. Your liver can actually keep up with three drinks over a long night. It can't keep up with six. The water is just a way to kill time and keep your brain from drying out.

GuestThe liver is a steady worker that can't be rushed, no matter how much you try to drown it in water.

HostThat glass of water is really just a way to give the factory line a chance to keep up.