The Effects of Chicken Extract on Mental Energy in Healthy Adults and the Underlying Mechanisms

Inclusion Criteria: * Male or female at 35-64 years of age * Assessed by investigator to be in good health * Normal cognition based on investigator's clinical judgement per the routine practice * Modified PSQI score \> 5 * Agree to participate in the study and provide written informed consent * Agree to abstain from herbal extracts or dietary supplements throughout the study period Exclusion Criteria: * BMI \< 18.5 or ≥ 27 kg/m2 * Concurrent pharmacological treatments * Current systemic diseases or current/history of neurological or cerebrovascular diseases * Active peptic ulcer, or a history of peptic ulcer within the last 2 years * Medications or interventions in the last 4 weeks, which in the investigators' judgement could potentially affect the outcome measures * Regular significant quantities of dietary supplements or herbal extracts (\> 2 times a week) in the last 4 weeks * Regular excessive caffeine consumption, heavy alcohol consumption or heavy habitual smokers * Any drastic changes in lifestyle (including diet, smoking, sleep, exercise, and mental and physical activities) in the last 4 weeks * Not able to maintain the same lifestyle throughout the study period * Inadequate visual and auditory acuity to allow neuropsychological testing per investigator's judgment * Inability to undergo fMRI scan * Any consumption of chicken extract supplement, or carnosine or anserine supplement, in the preceding 4 weeks * History of allergy to caseinate, milk, or chicken meat * W…