Alcohol: facts, effects and health risks


Alcohol: facts, effects and health risks


Alcohol, or ethanol, is a sedative, hypnotic drug, and the intoxicating ingredient present in wine, beer, and spirits.  It is produced by the fermentation of yeast, sugars, and starches found in different foods.

Alcohol is a legal recreational substance for adults, but it is commonly misused among individuals of all ages, resulting in significant health, legal and socio-economic damage. The effects of alcohol are particularly harmful to adolescents and unborn babies.

Alcohol is one of the most commonly used drugs in the US, and the World Health Organization (WHO) estimate that alcohol dependence is the third leading cause of disease burden in developing countries worldwide. An overdose of alcohol can lead to severe central nervous depression, with progression to coma or death.

Here are some key points about alcohol. More detail and supporting information is in the main article.

  • Pure alcohol is a colorless, odorless and flammable liquid
  • Fruits (grapes and apples) and grains (barley and wheat) are the most commonly used foods to make alcohol
  • The legal age to drink, buy or sell alcohol in the United States is 21 years of age
  • Alcohol is the number one abused drug by minors in the US
  • Although it is classified as a sedative, hypnotic drug, it has a stimulant effect in small amounts
  • The liver can only oxidize about one drink per hour
  • Alcohol is known to be harmful to developing brains (from fetus to adolescence)
  • No amount of alcohol consumption can be considered safe during pregnancy
  • The effects of drinking and taking other medications - either over-the-counter or prescribed - can be unpredictable and potentially deadly
  • Roughly 1 in 10 deaths among working-age adults results from excessive drinking.

What is alcohol?

Ethyl alcohol (ethanol), the only alcohol used in beverages, is typically produced by the fermentation of grains and fruits. Two other alcohols, methyl alcohol (methanol) and isopropyl alcohol (isopropanol), are found in commercial products and are considered toxic to humans.

Fermenting is a chemical process whereby yeast acts upon certain ingredients in the food, creating alcohol. Records of fermented beverages can be traced back to early Egyptian civilizations. One of the first alcoholic beverages to gain popularity in Ancient Greece was mead, a fermented drink made from honey and water.

Alcohol is often consumed in the form of beer, wine and spirits.

The most commonly consumed alcoholic beverages are beer, wine, and spirits.

Beer is brewed by malting, mashing, fermenting and aging grains (mainly barley). Flowers known as "hops" and other spices are added for flavor and balance. The alcohol content of beer averages 5%. One 12 oz beer is the equivalent of one "drink."

Wine is made by first fermenting and then aging different varieties of grapes. The alcohol content of wine varies from around 9% to 20%. A 5 oz serving of a 12% alcohol-content wine is the equivalent of one "drink."

Spirits are a product of both fermentation and distillation. This results in a much higher alcohol content of between 20% and 40%. A 1.5 oz measure of 80-proof spirits - a shot - is the equivalent of one "drink." Examples of spirits include vodka, gin, whiskey and rum.

Within minutes of ingesting alcohol, it is absorbed into the bloodstream by blood vessels in the stomach lining and small intestine. The alcohol then travels to the brain where it quickly produces its effects. Drinking with a meal slows the rate of this absorption, resulting in fewer side effects and less intoxication.

Approximately 20% of alcohol is absorbed through the stomach; most of the remaining 80% is absorbed through the small intestine. Approximately 5% of the alcohol taken into the body leaves through the lungs, kidneys and the skin; the rest is removed by the liver.

Alternative names for alcoholic drinks

  • Booze
  • Grog
  • Liquor
  • Charge
  • Nip
  • Bottle
  • Firewater
  • Hooch
  • Juice
  • Moonshine
  • Sauce
  • Strong drink
  • Tipple
  • Chaser
  • Nightcap
  • Nappy
  • Toddy
  • Red eye
  • Chug
  • Cold one
  • Hard stuff
  • Jack
  • Mouthwash
  • Swish
  • Vino.

Extent of alcohol use

Nearly a third of driving fatalities in the US in 2013 were due to alcohol consumption.

The 2013 National Survey on Drug Use and Health (NSDUH) recorded 8.7 million people ages 12-20 (22.7%) reporting drinking alcohol in the past month.

Additionally, 86.8% of people ages 18 or older reported that they drank alcohol at some point in their lifetime; 70.7% reported that they drank in the past year; 56.4% reported that they drank in the past month.

Alcohol-impaired driving fatalities accounted for 10,076 deaths (30.8% of overall driving fatalities).

Alcohol contributes to a high burden of disease in society in terms of years that people spend with disability or in poor health because of alcohol-related illnesses or injuries.


On the next page, we look at the side effects, health risks and withdrawal symptoms of alcohol consumption.

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How Alcohol Affects Your Brain And Body (Video Medical And Professional 2018).

Section Issues On Medicine: Psychiatry