caffeine

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Coffee and tea contain other compounds beyond caffeine that may benefit the brain as well.

From Science Daily • May 13, 2026

Even relatively small amounts of caffeine can have noticeable effects.

From Science Daily • May 13, 2026

These neurotransmitters naturally become less active with age and in diseases like Alzheimer's, so caffeine may help counteract that decline.

From Science Daily • May 13, 2026

Researchers say there are several reasons why very high caffeine intake may stop being beneficial.

From Science Daily • May 13, 2026

Judging from his dilated eyes and his maniacal grin, he didn’t need any more caffeine.

From "The House of Hades" by Rick Riordan