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.

Across those studies, caffeine drinkers had a 6%-16% lower dementia risk compared to non-drinkers, with one to three cups of coffee appearing to provide the greatest benefit.

From Science Daily • May 13, 2026

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

From Science Daily • May 13, 2026

Excessive caffeine can also interfere with sleep and increase anxiety, both of which may negatively affect brain health.

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

I had been cultivating a headache for the last few hours—the kind of headache that felt like it was going to pop my eyes right out of my skull—and caffeine usually helped.

From "Darius the Great Is Not Okay" by Adib Khorram