Understanding What the L in Front of Supplements Means
                                
                                
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                                    4 min read                                
                            
                                The 'L' prefix often found before names on supplement labels, such as L-Tyrosine or L-Theanine, signifies a crucial aspect of the molecule's chemical structure. This designation refers to the molecule's specific structural orientation, known as its L-isomer, which is the biologically active form that the human body can readily use.