What Is a Tyrosine Deficiency? Causes, Symptoms, and Treatment
                                
                                
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                                    4 min read                                
                            
                                Tyrosine deficiency is not a simple dietary issue, but rather a symptom of rare genetic metabolic disorders, with more than 100 cases of tyrosine hydroxylase (TH) deficiency having been reported in medical literature. The body typically produces this amino acid from another called phenylalanine, meaning a deficiency indicates a complex underlying health problem.