Does Drinking Alcohol Really Keep You Warm When It's Cold Out?

Joe Robbins / Getty
Joe Robbins / Getty

Daven Hiskey runs the wildly popular interesting fact website Today I Found Out. To subscribe to his “Daily Knowledge” newsletter, click here.

Here's something tailgaters, ice skaters, skiers and other cold weather fans might want to keep in mind: Drinking boozy beverages will make you feel warmer, but it doesn't actually keep you warm or prevent hypothermia. Instead, drinking alcohol lowers the core temperature of your body.

According to Dr. William Haynes, director of Clinical Pharmacology at the University of Iowa, “Consumption of alcohol undoes many of the human body’s healthy reflexes, one of which is keeping the core body temperature warm in cold weather.” It doesn’t even take that much for this effect to kick in—just one alcoholic drink will start the process that results in a lowered core body temperature.

How does alcohol do this, and why does drinking alcohol make you feel warmer, even though you actually are getting colder?

You Booze, You Lose (Heat)

Alcohol is a vasodilator. It causes your blood vessels to dilate, particularly the capillaries just under the surface of your skin. When you have a drink, the volume of blood brought to the skin’s surface increases, making you feel warm. (That dilation is why slightly or exceedingly intoxicated people look flushed.) This overrides one of your body’s defenses against cold temperatures: Constricting your blood vessels, thereby minimizing blood flow to your skin in order to keep your core body temperature up.

Someone enjoying a drink in the cold may feel warmer from the extra blood warming his skin, but that blood will rapidly cool thanks to the chill in the air. Plus, the warmth caused by blood rushing to the skin will also make him sweat, decreasing his core temperature even further. The rapid drop often occurs without the drinker realizing it, because his skin will still feel fairly warm, which makes it doubly dangerous to drink alcohol in extremely cold weather. (You might want to put down the coffee, too; caffeine has a similar effect.)

The Big Chill

This isn’t the only bad thing about drinking alcohol in the cold. According to a study done by the Army Research Institute of Environmental Medicine, drinking alcohol in chilly weather also reduces the body’s ability and tendency to shiver, taking away yet another method your body uses to help keep warm when it is cold.

Bottom line? The age-old practice of drinking alcoholic beverages to keep the body warm in cold weather is the exact opposite of what you should do.

Who Is 'The Real McCoy'?

Inventor Elijah McCoy is may or may not be "The Real McCoy."
Inventor Elijah McCoy is may or may not be "The Real McCoy."
Ypsilanti Historical Society, CC BY-SA 4.0 via Wikimedia Commons

After taking a cool, carbonated sip of champagne from the Champagne region of France, you might say, “Ah, now that’s the real McCoy.” Sparkling wine from anywhere else is technically just sparkling wine.

The phrase “the real McCoy,” which can be used to describe any genuine version of something, has several possible origin stories. And while none of them mention champagne, a few do involve other types of alcohol.

According to HowStuffWorks, the earliest known recorded instance of the saying was an 1856 reference to whisky in the Scottish National Dictionary—"A drappie [drop] o' the real MacKay”—and by 1870, a pair of whisky distillers by the name of McKay had adopted the slogan “the real McKay” for their products. As the theory goes, the phrase made its long journey across the pond, where it eventually evolved into the Americanized “McCoy.”

Another theory suggests “the real McCoy” originated in the United States during Prohibition. In 1920, Florida-based rum runner Bill McCoy was the first enterprising individual to stock a ship with alcohol in the Caribbean, sail to New York, and idle at least three miles offshore, where he could sell his wares legally in what was then considered international waters. Since McCoy didn’t water down his alcohol with substances like prune juice, wood alcohol, and even turpentine, people believe his customers started calling his top-notch product “the real McCoy.” There’s no definitive proof that this origin story is true, but The Real McCoy rum distillery was founded on the notion.

There are also a couple other leading theories that have nothing to do with alcohol. In 1872, inventor Elijah McCoy patented a self-regulating machine that lubricated parts of a steam engine without the need for manual maintenance, allowing trains to run continuously for much longer distances. According to Snopes, the invention’s success spawned a plethora of poor-quality imitations, which led railroad personnel to refer to McCoy’s machines as “the real McCoy.”

Elijah McCoy’s invention modernized the transportation industry, but he wasn’t the only 19th-century McCoy who packed a punch. The other was welterweight champion Norman Selby, better known as Kid McCoy. In one story, McCoy decked a drunken bar patron to prove that he really was the famous boxer, prompting others to christen him “the real McCoy.” In another, his alleged penchant for throwing fights caused the press to start calling him “the real McCoy” to acknowledge when he was actually trying to win. And yet another simply suggests that the boxer’s popularity birthed so many McCoy-wannabes that Selby started to specify that he was, in fact, the real McCoy.

So which “the real McCoy” origin story is the real McCoy? The 1856 Scottish mention of “the real MacKay” came before Elijah McCoy’s railroad invention, Kid McCoy’s boxing career, and Bill McCoy’s rum-running escapades, but it’s possible that the phrase just gained popularity in different spheres at different times.

Have you got a Big Question you'd like us to answer? If so, let us know by emailing us at bigquestions@mentalfloss.com.

7 Hangover Cures Backed By Science


fizkes/iStock via Getty Images Plus
fizkes/iStock via Getty Images Plus

Science has a lot to say about bogus hangover cures (coffee, hair of the dog, and saunas aren't doing you any favors), but not as much about which treatments are legitimate. That's not for a lack of trying: The quest to banish the headaches, nausea, and dizziness that follow a bout of heavy drinking has been going on for centuries. We still don't know how to prevent hangovers or how exactly they happen, but if you're feeling miserable after last night, there are a handful of science-based remedies that might ease your pain.

1. Asian Pear Juice

Have some extra Asian pears at home? Run them through your juicer before your next night out. According to researchers at Australia's Commonwealth Scientific and Industrial Research Organisation, just 7.4 ounces of Asian pear juice is enough to soften the blow of a hangover. The scientists say that the juice interacts with enzymes that break down alcohol, speeding up your metabolism and leaving less surplus alcohol for your body to absorb. There's just one catch: The juice must be consumed before you drink anything else in order to be effective. Apologies to anyone currently reading this through heavy-duty sunglasses.

2. Music

A woman lying in bed listening to music.
Prostock-Studio/iStock via Getty Images Plus

Anyone who's ever suffered through a massive hangover knows that sound is the enemy. But while your roommate's 9 a.m. tap dancing practice might exacerbate your symptoms, music may have the opposite effect. Research has shown that listening to music can provide relief to migraines, which are similar to hangover headaches. As long as the music is pleasant and suits your taste, it should help to drown out the chorus of pain playing in your mind. Head sensitivity isn't the only symptom music helps with: According to researchers at the University of Edinburgh, listening to your favorite music also eases pain. There hasn't been research specifically on hangovers, but at the very least it should hide your pained cries.

3. Pedialyte

Although not the primary cause of your hangover, one of the many ways alcohol can leave you feeling worse for wear the morning after is dehydration. Alcohol is a diuretic—it makes you pee a lot more than you would otherwise. If your fluids are depleted when you go to bed, you can expect to wake up feeling groggy, achy, and all-around not your best. Water is the simplest fix for dehydration, but for more extreme cases, there's Pedialyte. The drink was originally developed to rehydrate kids sick from vomiting and diarrhea, but it's marketed as a hangover treatment for adults as well. It contains nutrients, sodium, and other electrolytes—all things that can nurture your body when it's dehydrated. It won't cure the hangover, but it might help alleviate the worst of it.

4. Eggs

Scrambled eggs with parsley on a black plate
robynmac/iStock via Getty Images Plus

The best way to tackle a hangover with food is to eat while you drink. Chowing down after the damage has already been done may distract you from your turmoil for a short while, but it won't soothe your physical symptoms. There are a few exceptions: Eggs, for example, have hangover-fighting potential thanks to a special ingredient. The food is packed with cysteine, an amino acid that breaks down the drinking byproduct acetaldehyde. So whether you prefer to enjoy brunch out or at home, make sure your meal includes eggs in some form.

5. Honey on toast

While you're at it, put some honey on toast next to your omelet. According to Britain's Royal Society of Chemistry, while it won't cure a hangover, the breakfast can help alleviate the symptoms: "The best breakfast is toast and honey (or golden syrup) which provides the body with the sodium, potassium, and fructose which it now needs." The BBC talked to a junior doctor about this hangover remedy, and he recommended adding banana. While he cautions it's an acquired taste, the doctor explained, "Bananas are a high source of potassium—an electrolyte that gets depleted when you go out on the binge. The honey will give you that spike of sugar in your bloodstream and that energy rush to help you get back on your feet."

6. Anti-inflammatory drugs

If your first move when you're hungover is to reach for a bottle of aspirin, you have the right idea. Anti-inflammatory drugs may not do much to stop the underlying causes of your condition, but they can suppress your symptoms long enough for you to get out of bed without feeling like your head's been replaced with an anvil. On top of easing headaches and muscle pain, there's another reason these pills are good for hangovers: They may directly combat alcohol's inflammatory effects. But there's one over-the-counter painkiller you should never take while or after consuming alcohol, and that's Tylenol. Any drug that uses acetaminophen will only further abuse your recovering liver.

7. Sprite

Bottles of sprite on a table.
Alberto E. Rodriguez/Getty Images

If you're looking for something to nurse your hangover, skip the Bloody Mary. A team of Chinese researchers found that Xue bi, the Chinese version of Sprite, is actually the best beverage to combat the lingering side-effects of alcohol. Of the 57 drinks tested, Sprite was the best at helping enzymes break down acetaldehyde, the metabolized version of ethanol that's blamed for some of the nastiest hangover symptoms. The scientists also identified which concoctions you should avoid: A drink containing herbs and hemp seeds was the worst offender, as it actually prolongs acetaldehyde metabolism instead of speeding it up. (We should also caution that this test was done in a lab and might not be applicable to actual drinking scenarios.)

Bonus: Drink less

While this is definitely the least helpful of all suggestions, in 2005 an article in the BMJ looked at 15 studies of hangover cures, noting that "the paucity of randomized controlled trials is in stark contrast to the plethora of ‘hangover cures' marketed on the internet." Their conclusion? "No compelling evidence exists to suggest that any conventional or complementary intervention is effective for preventing or treating alcohol hangover. The most effective way to avoid the symptoms of alcohol induced hangover is to practice abstinence or moderation."

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