Can a green tea extract boost your brain and calm your stress?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Males and females 18 to 60 years of age, inclusive 2. Females not of child-bearing potential, defined as those who have undergone a sterilization procedure (e.g. hysterectomy, bilateral oophorectomy, bilateral tubal ligation, complete endometrial ablation) or have been post-menopausal for at least 1 year prior to screening Or, Individuals of child-bearing potential must have a negative baseline urine pregnancy test and agree to use a medically approved method of birth control for the duration of the study. All hormonal birth control must have been in use for a minimum of three months. Acceptable methods of birth control include: * Hormonal contraceptives including oral contraceptives, hormone birth control patch (Ortho Evra), vaginal contraceptive ring (NuvaRing), injectable contraceptives (Depo-Provera, Lunelle), or hormone implant (Norplant System) * Double-barrier method * Intrauterine devices * Non-heterosexual lifestyle and agrees to use contraception if planning on changing to heterosexual partner(s) * Vasectomy of partner at least 6 months prior to screening * Abstinence and agrees to use contraception if planning on becoming sexually active during the study 3. Individuals with moderate stress as determined by a score of 14 to 26 on the Perceived Stress Scale 4. Have a regular sleep-wake cycle with a bedtime between 9:00 pm and 12:00 am and receive between 7 and 9 hours of sleep for at least 3 weeks prior to baseline 5. Agrees to avoid caffeine (e.g., tea, coffee, energy drinks) for 12 h prior to post-screening clinic study visits 6. Agrees to avoid alcohol consumption and vigorous physical activity for 24 h prior to post-screening clinic study visits 7. Agrees to avoid first generation anti-allergy medication for 48 h prior to post-screening clinic study visits 8. Willingness to complete assessments and diaries associated with the study and to complete all visits 9. Agrees to maintain current lifestyle habits (diet, physical activity, medications, supplements, and sleep) as much as possible throughout the study 10. Provided voluntary, written, informed consent to participate in the study 11. Healthy as determined by medical history as assessed by the Qualified Investigator (QI) Exclusion Criteria: 1. Individuals who are pregnant, breast feeding, or planning to become pregnant during the study 2. Allergy, sensitivity, intolerance, or dietary restriction preventing consumption of investigational product or placebo ingredients 3. Self-reported confirmation of any significant neuropsychological condition and/or cognitive impairment (e.g., Schizophrenia, bipolar disorder, post-traumatic stress disorder, brain injury, stroke, neurodegenerative disease, infections, insomnia, depression, epileptic or other seizure-related disorders) that could interfere with study participation as assessed by the QI 4. Self-reported color blindness/weakness as assessed by the QI 5. Current employment that calls for rotating shift work or shift work that will disrupt normal circadian rhythm in the last three weeks as assessed by the QI 6. Unstable metabolic disease or chronic diseases as assessed by the QI 7. Current or history of any significant diseases of the gastrointestinal tract as assessed by the QI 8. Unstable hypertension. Treatment on a stable dose of medication for at least 3 months will be considered by the QI 9. Type I or Type II diabetes 10. Significant cardiovascular event in the past 6 months. Participants with no significant cardiovascular event on stable medication may be included after assessment by the QI on a case-by-case basis 11. History of or current diagnosis with kidney and/or liver diseases as assessed by the QI on a case-by-case basis, with the exception of history of kidney stones in participants who are symptom free for 6 months 12. Self-reported confirmation of current or pre-existing thyroid condition. Treatment on a stable dose of medication for at least 3 months will be considered by the QI 13. Major surgery in the past 3 months or individuals who have planned surgery during the course of the study. Participants with minor surgery will be considered on a case-by-case basis by the QI 14. Cancer, except skin basal cell carcinoma completely excised with no chemotherapy or radiation with a follow up that is negative. Volunteers with cancer in full remission for more than five years after diagnosis are acceptable 15. Individuals with an autoimmune disease or are immune compromised as assessed by the QI 16. Use of medical cannabinoid products as assessed by the QI 17. Chronic use of cannabinoid products (\>2 times/week). Occasional users will be required to washout and abstain for the duration of the study period 18. Regular use of tobacco or nicotine products in the past six months, as assessed by the QI. Occasional users will be required to washout and abstain for the duration of the study period 19. Alcohol intake average of \>2 standard drinks per day as assessed by the QI 20. Alcohol or drug abuse within the last 12 months 21. Current use of prescribed and/or over-the-counter (OTC) medications, supplements, and/or consumption of food/drinks that may impact the efficacy and/or safety of the investigational product (Section 7.3) 22. Participation in other clinical research studies 30 days prior to baseline as assessed by the QI 23. Individuals who are cognitively impaired and/or who are unable to give informed consent 24. Any other condition or lifestyle factor, that, in the opinion of the QI, may adversely affect the participant's ability to complete the study or its measures or pose significant risk to the participant