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.

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

From Science Daily • May 13, 2026

Once stimulation becomes too high, whether from stress, anxiety, or too much caffeine, performance begins to decline.

From Science Daily • May 13, 2026

Researchers also caution that measuring caffeine intake by "cups" is not exact.

From Science Daily • May 13, 2026

However, the benefits appear to level off after a certain point, meaning more caffeine is not necessarily better for the brain.

From Science Daily • May 13, 2026

But for the glucose and caffeine tablets in his survival pack, he would have ground to a halt hours ago.

From "Stormbreaker" by Anthony Horowitz