This is a randomized, double-blind, placebo-controlled, 4-week intervention clinical
study assessing the efficacy of Mirtoselect®, Virtiva® Plus, and Enovita® on cognitive
performance and mood states, and the occurrence of adverse events in response to daily
supplementation. The desired sample size for this study is 64 subjects. To account for
potential dropouts, we aim to enroll up to 20% over the desired sample size. Therefore,
this study will enroll up to 76 healthy men and women (25-55 years of age). Subjects will
be randomly divided into four study groups: Placebo, Virtiva® ginkgo biloba extract,
Mirtoselect® bilberry extract, or Enovita® grape seed extract. Blocked randomization will
be deployed in which subjects are divided into blocks of 4 subjects and each subject
within a block is randomly assigned to one of the four study groups. There are 4 study
events for this trial as follow:
Event 1 - Pre-screening/enrollment (Day -30 to Day -1): The potential subject will
present a health history questionnaire to screen for study eligibility described in
sections 5.2.1 (inclusion criteria) and 5.2.2 (exclusion criteria). The questionnaire
will be reviewed by the Investigator or designee, and if the subject is eligible, they
will be presented with an IRB approved ICF. The potential subject will be given the
opportunity to review the ICF, ask any questions they may have to the Investigator or
designee, and will be allowed to take the ICF home for review. The potential subject will
be required to sign the ICF for study enrollment to proceed with study participation.
Event 2 - Familiarization with study procedures (computerized cognitive testing,
questionnaires, and adverse event report) (Day -7 to Day -1): After obtaining written
informed consent form the subject they will be scheduled for familiarization. At
familiarization subjects will provide demographic details and will be assessed for
anthropometrics (height, weight, body mass index). Subjects will undergo an abbreviated
version (~15 minutes) of the computerized cognitive testing to familiarize with the
online platform, testing instructions, and cadence of the tests. Subjects will be shown a
clean copy of the abbreviated Profile of Mood States (POMS) questionnaire and the
Investigator or designee will describe the questionnaire and provide instructions for
completing the questionnaire. The Investigator or designee will explain adverse event
reporting and instruct the subject to notify the research staff immediately, or as soon
as possible, after the onset of any adverse event. After completion of the
familiarization procedures, subjects will be randomly assigned to one of four study
groups (Placebo, Virtiva® ginkgo biloba extract, Mirtoselect® bilberry extract, or
Enovita® grape seed extract) and will be assigned a subject No./ID in the 100 series
starting with "101" and continuing in sequential order until enrollment is met.
Event 3 - Baseline assessment (Day 0): In a fasted state, subjects will perform the full
computerized cognitive assessment (~45 minutes) and complete the abbreviated POMS
questionnaire (Pre). Immediately after, subjects will consume two capsules of their
randomly assigned study product. At 60-minutes post consumption, subjects will repeat the
computerized cognitive assessment and will be queried for adverse events. At 180-minutes
post consumption, subjects will repeat the computerized cognitive assessment followed by
the abbreviated POMS questionnaire, and will be queried for adverse events. The intent of
the 60- and 180-minute follow up testing is to investigate potential acute effects of the
study products. After the completion of Day 0, subjects will be instructed to continue to
take their respective study product twice daily, one capsule with the first meal of the
day and one capsule with the evening meal, for the duration of the supplementation period
(28 days).
Event 4 - Final Post-Testing (Day 29 to Day 31): After 28 days of supplementation,
subjects will be reassessed on the computerized cognitive assessment, abbreviated POMS,
and queried for adverse events. Following these assessments, the subjects will have
completed the study.