Is tyrosine the same as L-theanine? Understanding the key differences
                                
                                
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                                    4 min read                                
                            
                                L-tyrosine is a proteinogenic amino acid used by the body to build proteins, whereas L-theanine is a non-protein amino acid not used for protein synthesis. The answer to "is tyrosine the same as L-theanine?" is a definitive no, as these two compounds have fundamentally different roles, origins, and effects.