OUR QUALITY COMMITMENT: For nearly 5 years, Swanson has delivered science-backed health products worldwide. Each wellness supplement is made in our GMP certified facilities, and our purity and potency testing includes independent third-party labs.
Per GMP guidelines, most products are formulated for 24 months from the date of manufacture. Liquids and probiotics are formulated for 12 months.
L-theanine is an amino acid found almost exclusively in tea plants and, in particular, green tea. The pioneers at Taiyo International discovered that the relaxing properties of green tea may be tied to this unique nutrient and developed Suntheanine through a patented process designed to amplify its calming potential.