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.

To investigate this idea, the scientists designed a controlled experiment using different caffeine levels.

From Science Daily • Apr. 18, 2026

The people who gather in this small room on the eighth floor of the New York Stock Exchange look like a group of middle-aged caffeine addicts.

From The Wall Street Journal • Apr. 15, 2026

Sales of energy drinks and crafted sodas are booming as Americans look beyond coffee and tea to get their caffeine fix and treat themselves.

From The Wall Street Journal • Apr. 13, 2026

Scientists found that consuming caffeine at night can increase impulsive behavior, raising the likelihood of risky or uncontrolled actions.

From Science Daily • Mar. 31, 2026

For some reason sugar and caffeine always calmed down my hyperactive brain.

From "The Sea of Monsters" by Rick Riordan