Drink?: The New Science of Alcohol and Your Health

The summary

No amount of alcohol is good for you. That’s where neuroscientist David Nutt lands after decades studying how ethanol reshapes the brain, and it overturns everything you’ve heard about protective red wine and the French Paradox. Better data killed those stories. What’s left is a drug whose risks — cancer, liver failure, dementia, wrecked sleep, early death — climb in step with how much you drink, with benefits that rarely cover the cost.

How alcohol works on the brain

Alcohol hits three neurotransmitter systems at once. It boosts GABA, the brain’s off switch, producing the relaxation and lowered anxiety people are chasing. It blocks glutamate, the on switch, which explains the stumbling and the memory gaps. And it releases serotonin, dopamine, and endorphins, the chemicals that make you social, cheerful, and disinhibited. Drink enough and the frontal cortex goes quiet, so judgment and self-control collapse. Keep going, and the combination of GABA stimulation and glutamate blocking can slide into blackout, anesthesia, or death.

The same two drinks land differently depending on setting and expectation — preloading before a club is nothing like a glass of sherry at Christmas. Timing matters too; alcohol makes you sleepy when you’re already tired. Tolerance builds fast, which is dangerous: you drink more to feel the same effect, then lose that tolerance after a break and risk poisoning yourself if you return to old amounts. Your sex, genes, and last meal all shape the hit. Women absorb more from the same drink, food slows uptake, and about 70 percent of East Asians carry an ALDH gene variant that slows the breakdown of acetaldehyde — the poison and carcinogen your body makes from ethanol — causing flushing, racing heartbeat, and nausea.

Hangovers are withdrawal

A hangover is a small episode of alcohol withdrawal, driven by neurotransmitter imbalance, inflammation, and mitochondrial dysfunction. It can produce more than 47 distinct symptoms — disturbed sleep, dehydration, nausea, emotional distress. Congeners, the flavor compounds concentrated in aged and darker drinks, make it worse. Nutt notes that the misery may serve a purpose, acting as a natural brake against heavier drinking. Prevention is unglamorous but reliable: drink less, pace yourself, hydrate, and pick clearer spirits with fewer congeners. To treat one, try ibuprofen, food heavy in carbs, and caffeine.

The damage scales with the dose

The idea that moderate drinking guards the heart has fallen apart. The French Paradox — low heart disease despite plenty of fat and wine — is now better explained by the Mediterranean diet, more sun and vitamin D, and relaxed eating habits than by anything in the glass. The harms, by contrast, are well documented and dose-dependent. Alcohol is a risk factor for several cancers, including breast, colorectal, esophageal, pharyngeal, laryngeal, lip, and oral. It damages the liver in a progression from fatty liver to hepatitis to cirrhosis to cancer, often with no warning until it’s advanced. It weakens the heart, raises dementia risk, and can trigger memory-destroying conditions like Korsakoff’s syndrome and Wernicke’s encephalopathy. It inflames the pancreas, feeds insulin-dependent diabetes, and irritates the gut. As a rough measure, Nutt estimates that each seven units — roughly three glasses of wine — costs a 30-year-old man about 30 minutes of life.

The wider toll spreads past the drinker. Any alcohol impairs driving; at the UK limit of 80mg% you’re at least three times as likely to crash, and even one pint compromises you. When Scotland cut its limit to 50mg%, accidents fell. Alcohol also fuels violence — a 2016 report linked 90,000 deaths a year to alcohol-related violence — and worsens anxiety, depression, PTSD, and other mental health conditions. It raises cortisol, disrupts sex hormones, reduces fertility, harms pregnancies, and quietly degrades sleep, skin, and fitness.

Start with the need behind the drink

Cutting back, Nutt argues, begins with honesty about why you drink. He sorts drinkers into four types — social, conformity, enhancement, and coping — and warns that coping drinkers, who use alcohol to numb stress or anxiety, face the highest risk of addiction. A rough red flag is regularly downing more than six units in a sitting. A drink diary helps you see the pattern. So does a month off: Dry January works, but any month will do, and people report better sleep, more energy, weight loss, saved money, and the discovery that fun doesn’t require alcohol. For anyone with a family history of alcoholism or existing health problems, stopping entirely may be the only safe choice.

The bottom line

Alcohol is a powerful, addictive drug that harms nearly every organ, and no dose is actually protective — the risk simply rises with the amount. If you drink, work out which need it’s meeting and whether something else could meet it better. Read this if you drink regularly and want the clear-eyed science before you decide what to do about it.