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.

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

Coffee and tea contain compounds such as polyphenols and caffeine, which are thought to support brain health.

From Science Daily • Mar. 18, 2026

We all knew the effect caffeine had on Ms. Gruwell.

From "The Freedom Writers Diary" by The Freedom Writers