Microbiome Research: Nestlé & Singapore-based Scientists Study Benefits of Good Bacteria on Mood/Stress Levels

Singapore Institute for Clinical Sciences, A*STAR Research Entities served as the research center for a study involving microbiome research sponsored by Soci&eacute;t&eacute; des Products Nestl&eacute; (Nestl&eacute;),  the&nbsp;publicly traded Swiss multinational food and drink processing conglomerate corporation headquartered in Vevey, Vaud, Switzerland.&nbsp;&nbsp;Led by&nbsp;Nestl&eacute;-Purina North America, research head, Lisa Fries, Ph.D., the team designed a study to evaluate the effect of probiotic (BL) NCC3001 on mood and stress levels during the perinatal period. The study results, not done, are published to showcase the benefits of decentralized trials during the COVID-19 pandemic. The study included the use of social media to recruit participants. 
What&rsquo;s the challenge this study seeks to better understand?