How Long Does It Take for Caffeine to Wear Off?

Caffeine has a half-life of three to five hours in a person’s system, so it remains in the body for eight to 14 hours, according to the American Academy of Sleep Medicine. The effects of caffeine in the blood system peak 30 to 60 minutes after intake.

The effects of caffeine wear off more quickly for regular drinkers because they develop a tolerance for it, reports the AASM. Coffee and tea are the most dominant sources of caffeine intake for Americans. Consumption in the United States averages 200 milligrams per day, which is three times the world average. Moderate intake can improve a person’s alertness, reaction time and mood.

World View

This Year We’re Skipping the Fireworks, and Other 4th of July Safety Tips

History

Why Was the Declaration of Independence Written?

History

58 Years Later: What Was the Civil Rights Act of 1964?

History

Facts About the Louisiana Purchase That Might Surprise You

History

Celebrating Disability Pride Month and the History of the ADA

History

Mythic Months: Why Is July Named After Julius Caesar?