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Recruiting Participants For Our


We are looking for healthy female volunteers between the ages of 18 - 35 with a consistent menstrual cycle (26 - 30 days) to take part in a study of probiotics. We'll be examining how probiotics affect brain activity!

You will be administered a probiotic for 28 days and a placebo for 28 days. 

This study involves 4 visits to the lab, lasting approximately 2 - 3 hours each, questionnaires, and dietary logs. 

You will be compensated $20 / hour for participation in this study.


During the sessions you will receive brain stimulation by Transcranial Magnetic Stimulation (TMS) to motor areas of the brain.

For more information about this study, or to volunteer for this study, please contact: Faith Adams (

MRI Scan Image

What Will Participation Look Like?




Placebo/Probiotic for 1 Month


Wash-Out Period for 1 Month


Placebo/Probiotic for 1 Month



What is TMS?

Transcranial Magnetic Stimulation (TMS) is a non-invasive technique used to stimulate certain brain cells from the outside. The TMS works by generating a magnetic field through it's coils, which induces an electric current stimulating certain brain cells.

Interested? Email Us!

Faith Adams
PhD Student
Department of Kinesiology

Other ways to find us:
Instagram: neurophysiology_imaging_lab
Facebook: McMaster Neurophysiology and Imaging Lab

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This study has been reviewed by the Hamilton Integrated Research Ethics Board (HiREB) under project #16602

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