Two doses of Mangifera indica leaf extract in its soluble form, Zynamite® S, 100 mg of which 60 mg is mangiferin and 150 mg of which 90 mg is mangiferin, will be tested against a placebo. On the day of the test, the supplements will be administered 30 minutes before the start of the test. The supplements or placebo will be administered in cellulose capsules or similar and accompanied by a glass of water.

It has a total of 6 subscales: tension (score range, 0-36), depression (score range, 0-60), anger (score range, 0-48), fatigue (score range, 0-28), vigor (score range, 0-32), and confusion (score range, 0-28), and a total mood disturbance (score range, -32 to 200). Each of the questions will be scored from 0 (not at all) to 4 (very much so). The total mood disturbance score is calculated by summing the five negative subscale scores (tension, depression, anger, fatigue, and confusion) and subtracting the vigor score. Higher scores for the total mood disturbance score indicate a greater degree of mood disturbance.

The Rey Auditory Verbal Learning Test (RAVLT) is a neuropsychological test used to assess short- and long-term memory. The structure of the RAVLT consists of several parts:

• Learning: Participants are read a list of 15 unrelated words (List A) in five consecutive trials.

• Delayed Recall: The participant is asked to recall and repeat back the words from List A. To establish the score for this test, the following elements are considered to calculate the scores:

  • Total learning score: The total number of words correctly recalled in the five trials of List A is added up. Normal scores are 6 words correctly recalled in the first trial and 12 or 13 in the fifth trial. This reflects the ability for learning and short-term memory.
  • Delayed Recall: The number of words recalled from List A after the time interval without practice (20-30 minutes) is noted. This assesses long-term memory. The score can range from 0 to 15 points.

It is used to assess executive function and specifically measures timed motor and visual tasks. This test is divided into two parts: Part A (TMT-A), which assesses psychomotor attention and speed and consists of connecting consecutively numbered circles; and Part B (TMT-B), which is based on connecting alternating circles of letters and numbers and measures executive function. A longer time spent completing the test is interpreted as worse performance.