Overview
The purpose of this study is to learn about the change in quality of sleep, structural organization of sleep, and cardiovascular responses after consuming an energy drink compared to a placebo drink with no caffeine or stimulants.
Eligibility
Inclusion Criteria:
- Adults 18 years of age and older.
- Healthy subjects without known cardiovascular disease and thyroid disease.
- Subjects who are on no medications (except oral contraceptive pill).
- Nonsmokers.
- No prior history of caffeine sensitivity or allergy.
Exclusion Criteria:
- Subjects with known cardiovascular or thyroid disease.
- Subjects currently taking medications other than oral contraceptive pill.
- Smokers.
- Prior history of caffeine sensitivity or allergy.
- Pregnancy.
- Subjects who regularly consume energy drinks.
- Subjects who typically go to sleep after midnight.
- Subjects who traveled across 2 time zones in the last 7 days.
- Shift workers.
- Subjects who have or are suspected to have sleep apnea.
- Subjects who have a body mass index > 35kg/m^2.