TROPPO TARDI PER IL CAFFÈ? MA PER FAVORE.
The waiter placed before me a dazzling ceramic cup containing a most uncompromising black coffee. My companion regarded the object—and indeed myself—with a certain anthropological curiosity.
“It is seven in the evening,” she said, narrowing her eyes as though examining a peculiar medical specimen, “will you sleep after drinking something so strong?”
I smiled in the leisurely manner of a man accustomed to this interrogation. “My dear,” I replied, “I could consume a cup of black coffee at midnight and be asleep by 12:01.”
“You are odd,” she established, with the crisp authority of one who has diagnosed an anomalous psychological disorder.
Perhaps I am. Yet the exchange illustrates a misunderstanding so widespread that it has hardened into modern folklore: the conviction that caffeine, once ingested after some arbitrary afternoon deadline, transforms the human body into an insomniac auditorium of agitation.
One must first observe how contemporary belief is manufactured. Repetition is the prodigious engineer of certitude. When newspapers, wellness columns, and health influencers repeat—day after day—that caffeine after 2 p.m. is an invitation to nocturnal ruin, the claim gradually acquires the gravity of Newtonian law.
Yet physiology is rarely so obedient to slogans.
Caffeine, pharmacologically speaking, is a central nervous system stimulant that operates primarily by antagonising adenosine receptors in the brain. Adenosine, that gentle biochemical usher, accumulates throughout the day and whispers to the nervous system that fatigue has arrived. Caffeine rudely interrupts this conversation, temporarily silencing the messenger and creating the sensation of alertness.
But here lies the elemental complication: human beings metabolise caffeine at dramatically different rates.
The liver enzyme CYP1A2 determines how expeditiously caffeine is broken down. Genetic polymorphisms mean that some individuals are what medical literature calls fast metabolisers, while others remain slow metabolisers. For the former, caffeine’s half-life may be as short as three hours; for the latter, it may linger for eight or even ten. In other words, two people may drink identical cups of coffee and experience entirely different neurological outcomes.
The Victorians, who possessed fewer biochemical charts but rather keen powers of observation, would not have been surprised by this. Individual constitution, temperament, and habit have always shaped how the body receives stimulants—whether caffeine, wine, or political argument.
Allow me to offer a domestic illustration.
Whenever my parents fail to sleep soundly, the evening coffee is promptly indicted as the culprit. The prosecution is prompt, the verdict unanimous. Coffee, apparently, has committed a crime against the circadian rhythm.
Yet there exists a peculiar detail.
My mother, a doctor of considerable experience, has taken WL tablet each night for over four decades. What she has never quite paused to notice is that this typical tablet is not a single compound but a quartet of pharmacological actors: paracetamol, levocetirizine, phenylephrine, and—most ironically caffeine itself.
Thus the courtroom entertainment collapses into farce. The coffee is accused of sleeplessness while the nightly medication tacitly introduces caffeine into the bloodstream like an inconspicuous accomplice.
My father’s reasoning, meanwhile, occupies a more philosophical register. When informed that certain teas contains caffeine, he responds with a logic so elegant it would have pleased certain medieval theologians:
“How can tea contain coffee?” he asks, “Tea is tea.”
One is reminded that human psychology is not organised primarily around evidence but around narrative convenience. The mind prefers a simple villain, and coffee—dark, bitter, and artistically vivid—makes an excellent scapegoat.
This cerebral tendency has been studied extensively within psychology. Confirmation bias, first articulated by cognitive researchers in the mid-twentieth century, describes our inclination to notice evidence that supports an existing belief while conveniently ignoring contrary data.
If one expects coffee to cause insomnia, every restless night becomes proof of its guilt. If, however, one consumes tiramisu, chocolate cake, or tea—each containing measurable quantities of caffeine—one sleeps peacefully and remembers nothing at all.
Curiously, Tiramisu, that most beloved of Italian desserts, contains both espresso and cocoa. Yet diners consume it after dinner with great enthusiasm and little fear of neurological catastrophe.
Apparently caffeine becomes dangerous only when it arrives in a cup rather than a cake.
My own education in this matter occurred during extended stays in Italy, a civilisation whose relationship with coffee borders on the ceremonial.
Italians drink espresso at night with the composed confidence of people who have survived both empires and operas. This is not because caffeine runs through their veins in place of blood—though one might suspect as much in Naples—but because espresso forms an essential punctuation mark in Italian gastronomy.
Breakfast may feature a cappuccino and a sweet pastry, yet after dinner comes the ritual of the small, opaque, concentrated shot.
Why?
Partly because espresso performs a modest digestive service. The bitter compounds—tannins and alkaloids—stimulate gastric acid secretion. In physiological terms, they encourage the stomach to resume its labour after the heroic consumption of pasta, bread, olive oil, and desserts.
There is genuine biochemical logic here. Bitterness in food has historically signalled digestive stimulants—think of herbal aperitifs, tonic bitters, or medicinal liqueurs.
Yet there is another reason: pleasure. Civilisations that endure tend to recognise that digestion is not merely chemical but cultural.
Still, one must address the inevitable question: What of the caffeine?
A single one-ounce espresso shot contains approximately 63 milligrams of caffeine. Compare this with an eight-ounce cup of drip coffee, which may contain 80 to 100 milligrams, sometimes considerably more.
Thus the tiny chinaware cup—often resembling something borrowed from a child’s toy tea set—delivers less stimulant than the lumbering mugs favoured in certain Anglo-Saxon offices.
The real issue is not caffeine itself but dose, timing, and individual metabolism.
One might therefore ask a few awkward questions:
- If caffeine were universally catastrophic after sunset, how have entire Mediterranean cultures survived nightly espresso for centuries?
- Why do individuals metabolise caffeine so differently, yet receive identical lifestyle advice?
- And why does society panic over coffee while calmly ingesting chocolate, tea, and dessert cocktails with comparable stimulatory effects?
The final admonition, naturally, is moderation—a virtue celebrated from Aristotle onward.
Espresso should not be consumed on an empty stomach, nor should it be treated as a competitive sport. Excess caffeine can indeed provoke gastric irritation, tachycardia, anxiety, or fragmented sleep in sensitive individuals. Milk-heavy drinks such as cappuccino are discouraged after dinner in Italy because the stomach must labour longer to process milk proteins and fats.
Hence the chic simplicity of the after-dinner espresso: small, sharp, and swiftly concluded.
It is less a beverage than a culinary full stop.
So when the waiter places before you that small inky cup at the close of an evening meal, one need not regard it with suspicion. One might instead regard it as the Italians do: a final note in the concinnity of dinner.
Drink it slowly—or if one must, with a little affected gulp.
Then sleep, if you are fortunate, at 12:01.
Salute.
