You’re wondering why you feel so bad when you “just” had fun last night. You drank, you laughed, you danced… and now you’re eaten up by guilt and that same old thought; last night was the last time.
👉 What if we told you that a hangover isn’t just a headache… it’s literally a moderate intoxication? Yes, you are slightly poisoned. But don’t panic, we’ll explain.
☠️ Acetaldehyde: the enemy within
When you drink alcohol, your liver turns ethanol into acetaldehyde.
And this charming compound is highly toxic: it’s a recognised carcinogen, a cellular disruptor and, above all, one of the main causes of hangovers.
“Acetaldehyde is one of the most harmful metabolites of ethanol, causing inflammation, oxidative stress and liver damage.” Zakhari S., Alcohol Research & Health, 2006
🔥 Oxidative stress: fire on every floor
Alcohol triggers an explosion of free radicals, those molecules that attack anything that moves: proteins, cell membranes, DNA… Your liver tries to counter this with glutathione, but after a heavy night, its reserves melt away like snow in the sun.
“The damage linked to oxidative stress after alcohol consumption partly explains the fatigue, nausea and lethargy associated with hangovers.” Niemelä O., Free Radical Biology & Medicine, 2007
💣 You are literally inflamed
Your body’s immune response to this biochemical assault triggers:
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Headaches
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Muscle aches
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Nausea
- Irritability
Your body thinks it has been attacked. And in a sense, that’s true: you attacked it with a cocktail of toxins.
📊 Hangovers: a real chain reaction
| Stage | Consequence |
| Alcohol → Acetaldehyde | Nausea, inflammation |
| Oxidative stress | Fatigue, headaches |
| Dehydration | Cramps, confusion |
| Drop in glutathione | Slow elimination of toxins |
🧠 In short:
You’re not just “unwell”. You are temporarily intoxicated. And your body is doing what it can to flush it out.
The right reflex?
Anticipate. Alternate each alcoholic drink with a glass of water. And avoid meals that are too fatty or too sugary. If you’d like to learn more about which foods are best to eat the day after a party, we’ve dedicated an article to the subject.