If you like piña coladas, then chances are you’ve met their less-charming cousin: the hangover.
If you’re not laughing right now, you are either: A) Currently sipping a piña colada somewhere between Key Largo and Key West, or B) Dealing with the consequences of one.
And if you picked A, there’s a pretty good chance you’re eventually going to end up with B. Which begs the question: What exactly is a hangover anyway?
Is it dehydration? Too much sugar? Your liver waving a tiny white flag?
As it turns out, a hangover is your body’s version of filing multiple complaints at the same time. And while the pounding headache and nausea may feel like punishment for your life choices, there’s actually a fascinating amount of science happening behind the scenes.
So, let’s talk about what really happens after that second, third or “I’m-on-vacation-so-calories-don’t-count” drink.
Once alcohol enters your body, it’s absorbed through the stomach and small intestine and makes its way into your bloodstream. From there, it travels everywhere, including your brain. That’s why you might feel relaxed, chatty or suddenly convinced karaoke is a good idea.
Then your liver gets to work.
The liver is responsible for breaking down alcohol, and it can only process about one standard drink per hour. And before anyone says, “I only had two drinks,” it’s worth knowing what actually counts as a standard drink. In the United States, that’s roughly 12 ounces of regular beer, 5 ounces of wine or 1.5 ounces of distilled spirits like vodka, rum or tequila. That frozen piña colada you ordered poolside? Depending on who’s pouring, it may contain two or even three standard drinks.
Here’s where things get interesting. Larger individuals often have more total body water, which means alcohol may be more diluted in the bloodstream initially. In other words, they may not feel the effects quite as quickly as someone with a smaller frame. But that doesn’t mean they process alcohol any faster.
And what I’m about to tell you next is a fact that has stuck with me since freshman year of high school: Most adults only have about 10 to 12 pints of blood circulating through their bodies. Even though larger people generally have slightly more blood volume, the difference isn’t nearly as dramatic as many people think. So, while body size can influence blood alcohol concentration, it doesn’t give anyone a free pass from liver physiology. The liver still has to break down the alcohol one drink at a time. And that work isn’t exactly glamorous.
When your liver breaks down alcohol, it first converts it into a compound called acetaldehyde. Unfortunately, acetaldehyde is significantly more toxic than alcohol itself. Your body works quickly to convert it into a less harmful substance called acetate, which can eventually be broken down into water and carbon dioxide. But if you drink faster than your liver can keep up, acetaldehyde can accumulate, contributing to nausea, sweating, headaches and that overall feeling that perhaps you should never make the same “let’s go drinking” decision again.
Then there’s dehydration.
Alcohol suppresses a hormone called antidiuretic hormone, or ADH, which normally helps your body hold onto fluid. Less ADH means more trips to the bathroom. More trips to the bathroom mean dehydration. Dehydration can contribute to headaches, dizziness, dry mouth, fatigue and that desperate search for a sports drink and greasy breakfast.
As if that weren’t enough, alcohol also triggers inflammation. Research suggests that drinking increases the production of inflammatory chemicals called cytokines. Translation? Your immune system basically wakes up grumpy. This inflammatory response may contribute to fatigue, difficulty concentrating, decreased appetite and that general feeling that you’ve been hit by a golf cart.
And let’s not forget sleep.
Many people believe alcohol helps them sleep better. Technically, it may help you fall asleep faster. The problem is that alcohol disrupts the quality of sleep, particularly REM sleep, the stage associated with memory, learning and feeling restored. So even if you spend eight hours in bed (or eight hours on Duval) you may still wake up feeling exhausted and frantically checking your phone to make sure you didn’t make an appearance on the Key West Gravity Chronicles Facebook page.
When you put all of these pieces together — dehydration, inflammation, disrupted sleep and the buildup of toxic byproducts, the hangover starts to make a lot more sense. It’s not just discomfort; it’s evidence that your body has been under stress. Alcohol affects coordination, reaction time, blood sugar regulation, hydration status, inflammation and sleep quality. Add those together, and it’s no wonder the morning after can feel so miserable.
Now, this isn’t me telling you to skip the margarita at sunset or avoid celebrating life’s big moments. Life is meant to be enjoyed, and part of living in the Keys is embracing the occasional umbrella drink with friends and family.
But understanding what your body is going through might make you think twice about that “one for the road” mentality. The body is many things, but sentimental isn’t one of them. It responds to physiology, not intentions.
So, if you choose the piña colada, drink some water, eat a meal and maybe call it a night before your liver starts drafting its resignation letter. Your tomorrow-self will thank you.
