L-theanine marketing claims about alpha brain wave enhancement lack experimental support in controlled testing without caffeine, yet the supplement still demonstrates measurable improvements in task accuracy. Researchers found the mechanism of L-theanine's cognitive benefits remains unexplained. — Photo by Griffin Wooldridge on Pexels (Pexels License)
MD, MPH, PhD. Editor-in-Chief, Georgian Medical Journal (GMJ). Professor and Head, School of Public Health, David Tvildiani Medical University (DTMU), Tbilisi, Georgia. Chair, Public Health Institute of Georgia (PHIG). President, Accréditation Sans Frontières (ASF), Paris. Secretary/Treasurer, UEMS Section of Public Health. WHO Consultant, Health and Migration, Geneva. Former Member, UN Secretary-General's Independent Accountability Panel for Every Woman, Every Child, Every Adolescent (IAP-EWEC, 2016–2021). ORCID: 0000-0001-7609-4515.
