The Anatomy of a Hangover: From First Sip to Morning Regret

Tis the season to be merry…and hungover! While Christmas might bring the festive cheer, unfortunately, it also brings a wave of regret for many. In fact, the average Brit spends more than a year of their life nursing a pounding head and a queasy stomach, according to research by cancer charity MacMillan. But a hangover isn’t just a case of feeling groggy; it can seriously impact your cognitive abilities and emotional well-being.

Research by the University of Bristol has uncovered that people who indulged the night before performed worse in maths and memory tests the next day, and struggled to control their emotions. Dr. Craig Gunn, a lecturer in psychological science who led the study, stated: “Hangovers appear to impact most aspects of executive functions [key skills such as problem solving]. This substantial impact on individuals and wider society should be considered a public health concern.”

So, what exactly happens to your body from the moment you take that first sip to waking up with a pounding head? Let’s break it down:

Two Minutes After You Start Drinking: Time to Absorb

Alcohol is swiftly absorbed into the bloodstream through the mucous membrane lining your stomach and intestines. Dr. Debbie Shawcross, a professor of hepatology and medical advisor to the British Liver Trust, explains: “About a quarter of it is absorbed via the stomach – the rest is absorbed further along your digestive tract.” The speed of this absorption depends on several factors, including the alcohol content and whether your stomach is full (eating slows down absorption).

Five to Ten Minutes: Feel-Good Chemicals, Reduced Inhibition

Within minutes, alcohol crosses the blood-brain barrier, triggering a rush of “feel-good” chemicals like dopamine and serotonin. These neurotransmitters regulate mood and rational thought, reducing inhibitions and making you feel more relaxed and sociable – leading to potentially impulsive behaviour.

30 Minutes: The Tipsy Threshold

One unit of alcohol (roughly a small glass of wine or a pint of beer) has now been fully absorbed into your bloodstream, and that’s when you start feeling the effects.

One Hour: The Liver Goes to Work

Your liver, the ultimate detoxifier, springs into action to process alcohol. The liver treats alcohol as a toxin, breaking it down at a steady pace – about 60 minutes per unit.
The first step involves breaking down alcohol into acetaldehyde, a toxic substance that can cause flushing, nausea, and palpitations. Further enzymes then convert acetaldehyde into acetate, which is eventually broken down into carbon dioxide and water, released from the body through urine, breath, and sweat.

Two Hours: Getting Sluggish

As the alcohol continues to influence your nervous system, you’ll likely notice a decline in coordination and speech will become slurred. This is due to the effect alcohol has on GABA, a chemical messenger in the brain responsible for inhibition.

Four Hours: Passing Out

With the liver struggling to keep up with the amount of alcohol being consumed, you may start to feel drowsy and eventually pass out. This is your body’s way of protecting itself from further damage.

The Aftermath: The Hangover Begins

Hangover symptoms are the result of lingering alcohol and acetaldehyde in your system, along with dehydration and an inflammatory response triggered by your body trying to repair the damage.

Common Hangover Symptoms:

• HEADACHE: Dehydration and electrolyte loss are the main culprits.
• NAUSEA: Acetaldehyde irritates the gut lining.
• ACHES AND TIREDNESS: Your immune system releases cytokines, leading to inflammation and fatigue.
• FOOD CRAVINGS: Blood sugar dips can lead to unhealthy cravings.
• SLEEP PROBLEMS: Alcohol disrupts sleep patterns.
• ANXIETY: Alcohol’s stimulating wake-up call disrupts your hormonal balance.

The severity of your hangover depends on several factors, including the amount you drank, your body weight, how quickly you consumed it, and your general health.

Unfortunately, there’s no magic cure for a hangover. Dr. Gunn emphasizes: “The best way to limit a hangover is to consume alcohol in moderation.”

However, there are a few things you can do to minimize your suffering:

• Don’t drink on an empty stomach.
• Sip water or non-fizzy drinks between alcoholic beverages.
• Drink plenty of water before bed.

So, this holiday season, enjoy the festivities responsibly and prioritize your well-being.