About this trial
The purpose of this study is to investigate the effects of increasing brain energy on cognition. The hypothesis is that by using a special kind of light, in combination with a nutritional supplement, it may be possible to increase energy production in the brain, which may lead to improvements in cognition.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Age: 18-85 years old
No uncorrected visual, auditory, or motor impairments that would interfere with performing cognitive tasks
Disqualifiers
Transcranial photobiomodulation in the last six weeks
Diabetes
Pregnancy or plans to become pregnant
Breastfeeding or plans to breastfeed
Trial design
Factorial
Treatments tested in this trial
Active transcranial photobiomodulation
DeviceInfrared light delivered to the forehead, administered with a headset using light-emitting diodes (LEDs)
Active MCT dietary supplementation
Dietary supplementCommercially-available food-grade refined coconut oil for ketogenic dietary supplementation
Sham photobiomodulation
DeviceIdentical procedure as active group, but with 5% of light emitted by the device.
Sham dietary supplementation
Dietary supplementIdentical appearance and administration as active dietary supplementation, but with commercially-available food-grade sunflower oil (comparable caloric value without ketone production).
Treatment groups
Trial outcomes
Primary outcomes
Cognitive assessment: Montreal Cognitive Assessment (MoCA)
The Montreal Cognitive Assessment is a standard questionnaire which was developed to test for cognitive impairment. The MoCA assesses a variety of cognitive functions including executive function, memory, attention, and verbal fluency. Minimum=0; Maximum=30; low score=more impairment.
Cognitive assessment: Trail-Making Test
The trail-making test (TMT) is a paper-and-pencil "connect-the-dots" task which is used to test visual attention and cognitive flexibility. Completion time (seconds) and number of errors are recorded. Faster time and lower errors=better performance. Maximum time alloted=300 seconds.
Brain metabolism assessment: Functional Near-Infrared Spectroscopy (fNIRS)
Participants wear a device on the head which assesses brain metabolism non-invasively using functional near-infrared spectroscopy. The device records changes in the concentrations of oxygenated hemoglobin in the prefrontal cortex of the brain.
Secondary outcomes
Cognitive assessment: 2-Back Task
The 2-back task is a standard computer-based test that assesses attention and short-term memory, in which participants remember a series of letters presented onscreen. Accuracy (number of errors) and speed (reaction time in seconds) are recorded. Faster time and lower errors=better performance. Duration: 5 minutes.
Cognitive assessment: Delayed Match-to-Sample Task (DMS)
The DMS is a standard computer-based test that assesses visuospatial memory and attention, in which participants remember a grid pattern through a delay and then identify the correct match. Number of correct responses and reaction time in seconds are measured. Faster time and lower errors=better performance. Duration=5 minutes.
Weekly check-in
Open response, verification of compliance of treatment
Follow-up
Open response of any long-term effects of treatment
Sponsors and contacts
Click on the lead sponsor to view all of their trials.
Francisco Gonzalez-Lima, PhD
Lead sponsor
University of Texas at Austin
Sponsor institution
This trial is not recruiting at the moment. You can still explore other options: