Features Specifications:L-theanine tea  L-theanine is clinically proven to reduce stress, improve the quality of sleep, diminish normal syptoms of PMS, heighten mental acuity and reduce negative side effects of caffeine.   L-theanine is a non-protein amino acid mainly found naturally in the green tea plant (Camellia sinensis). L-theanine is the predominant amino acid in green tea and makes up 50% of the total free amino acids in the plant. The amino acid constitutes between 1% and 2% of the dry weight of green tea leaves. L-theanine is considered the main component responsible for the taste of green tea, which in Japanese is called umami. L-theanine is marketed in Japan as a nutritional supplement for mood modulation. L-theanine is a derivative of L-glutamic acid.  Molecular Formula:C7H13N2O3 CAS #:3081-61-6  L-theanine is also known as gamma-ethylamino-L-glutamic acid, gamma-glutamylethylamide, r-glutamylethylamide, L-glutamic acid gamma-ethylamide and L-N-ethylglutamine. SPECIFICATION:  Physical appearance Fine brown yellow powder OdorTaste Charactcristic Mesh Size NLT 90% through 80 Mesh Solubility Easily soluble in water Theaine NLT 20% Theaine  Caffeine NLT1.0%  Drying loss NMT5.0% Ash (%) NMT5.0% Arsenic(mg/kg) NMT1ppm ()Heavy metals(mg/kg) NMT10ppm  BHC  NMT0.1ppm  DDT NMT0.1ppm Total plate count(/g) NMT1000cfu/g Total YeastMold NMT100cfu/g E.Coli NEGATIVE Salmonclla NEGATIVE Shelf Life 2year if sealed and stored away from direct sun light