caffeine

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caffeine molecule

Explore the health benefits of coffee consumption

How does caffeine affect the human body and brain?

Caffeine content of popular drinks.

A white woman bites into a chocolate bar.

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Coffee beans after roasting.

How Is Coffee Decaffeinated?

Cuban coffee served in the colonial city of Trinidad, Cuba

Why Does Too Much Caffeine Keep You Awake at Night?

tea. tea production. Camellia. Dried tea leaves in tea bag from tea plantation seeping in hot water in clear cup of tea. mug of tea. Camellia sinensis

Trivia with a Capital “Tea”: 5 Things You Didn’t Know About Tea

Opium. Opium poppy. Papaver somniferum. Seed. Spice. Poppy seed. Pile of poppy seeds.

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Estimated battle casualties, Normandy invasion, World War II. WWII, D-Day

Estimated Battle Casualties During the Normandy Invasion and Campaign to Liberate Paris (June–August 1944)

Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.

10 Famous Artworks by Leonardo da Vinci

The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.

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Cleopatra hieroglyphic carving the Ancient Egyptian queen Cleopatra. Wall of the Temple of Horus at Edfu, Egypt.

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Salem Witch Trials. Photogravure after the painting by Walter McEwen titled - The Witches - circa 1890s.

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African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.

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Normandy Invasion: Omaha Beach. World War II. D-Day. Infographic. SPOTLIGHT VERSION

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caffeine: Facts & Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Last Updated: Jun 13, 2025

News •

New hypothesis links caffeine to lower risk of sudden infant death syndrome • June 11, 2025, 5:17 PM ET (News-Medical)

Helping Save Kyiv From Drones: Volunteers, Caffeine and Vintage Guns • June 8, 2025, 9:07 AM ET (New York Times)

Facts

Also Known As	trimethylxanthine

Photos and Videos

caffeine molecule

Explore the health benefits of coffee consumption

How does caffeine affect the human body and brain?

A white woman bites into a chocolate bar.

See All Videos, Images and Interactives →

Topics

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Demystified

Coffee beans after roasting.

How Is Coffee Decaffeinated?

Cuban coffee served in the colonial city of Trinidad, Cuba

Why Does Too Much Caffeine Keep You Awake at Night?