Product name: Theanine Other Name: green tea theanine; green tea extract INCI Name: THEANINE Molecular Formula: C7H14N2O3 Molecular Weight: 174.2 Appearance: White powder Purity: 98% CAS NO.: 3081-61-6 EINECS No.: 221-379-0 Supplier: ZHENYIBIO L-theanine can also provide nutrition to the skin.As mentioned earlier,the external source of L-theanine is green tea.People who believe that L-theanine pure is good for the skin often use green tea regularly.L-theanine is a unique amino acid naturally present in green tea.Nootropics l theanine can promote relaxation without causing drowsiness,and it can also promote healthy cell function and reduce stress and anxiety.