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.

Even though both sexes had similar levels of caffeine in their systems, females displayed much higher levels of impulsive behavior.

From Science Daily • Mar. 31, 2026

Flies that consumed caffeine during the day did not show the same pattern, indicating that the timing of caffeine intake plays a key role.

From Science Daily • Mar. 31, 2026

Kirkland Signature energy drinks mimic Celsius’s look, flavors, and 200 milligrams of caffeine, causing Celsius shares to fall.

From The Wall Street Journal • Mar. 25, 2026

It was a group powered by caffeine, Johnston said, and their coffee came in handy when they needed a liquid prop to do quick demos with the prototypes to test their absorbency.

From The Wall Street Journal • Mar. 20, 2026

Or, what if a regular coffee drinker drives to work in the morning without his usual cup of caffeine?

From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel