Evaluating the Impact of Energy Drink Formulas on Alertness for an Extended Period

Inclusion Criteria: * Participants are aged 18-49 years, inclusive * Participants self-report that they are in good health * Willing to maintain habitual diet, physical activity pattern, and body weight throughout the trial * Willing to abstain from consumption of caffeine for 12 h prior to testing * Willing to abstain from alcohol consumption and avoid vigorous physical activity for 24 h prior to all test visits * Willing to refrain from 'over the counter' medications (e.g. pain medication) and stimulant medication for 12 hours, seasonal allergy/hayfever nasal antihistamine medications for 24 hours and oral antihistamines for 48 hours prior to all test visits * Regular caffeine consumer (at least one caffeinated beverage per day, not less than 35 mg) * Are fluent in English (equivalent to IELTS Level 6) * Understand the study procedures and willing to provide informed consent to participate in the study and authorization to release relevant protected health information to the study Investigator Exclusion Criteria: * Fail to meet any one of the inclusion criteria * Currently use of prescription medication, including contraceptives * Report hypersensitivity to caffeine * Have experienced major trauma or major surgical event within 6 months of screening * Have extreme dietary habits, as judged by the Investigator (high fat, very high protein diets, intermittent fasting, etc.) * Have a history of cancer in the prior two years, except for non-melanoma skin cancer * Have a visu…