Your liver is a heroic little factory, but it’s lazy. When you drink, it first breaks ethanol down into a chemical called acetaldehyde. This stuff is basically toxic biological graffiti.
Acetaldehyde is 30 times more toxic than alcohol itself. It’s the same chemical your body makes when you’re hungover, only now it’s flooding your system immediately.
Your brain sees this poison and panics. It yells to your stomach, “Emergency! Get the evac plan!” And that plan is vomiting—the body’s most dramatic way of saying, “No thank you.”
The Gut: A Drama Queen in a Bar
Your stomach lining is like a fussy houseguest. Alcohol irritates it directly, causing inflammation and extra acid production. Your stomach interprets this as, “We just ate a bag of thumbtacks.”
Also, alcohol speeds up digestion like a caffeinated hamster. Food rockets through, but that only confuses your nervous system more. Your gut and your brain start arguing, and you lose that fight.
One surprising fact: carbonation makes this worse. Bubbles in beer or champagne stretch your stomach faster, tricking it into thinking you’re full of strange poison.