Evaluation of Prealbumin Levels in Men With Low-T

Inclusion Criteria: * Provide responses to standard questionnaires administered to subjects * Written Informed Consent obtained * Male sex at birth * ≥ 40 and ≤ 75 years of age * Presentation to the clinic with symptoms suggestive of low testosterone such as loss of libido, erectile dysfunction, cognitive or mood disturbances, etc. * Able and willing to provide blood specimens and follow study schedule * A final diagnosis can be established (androgen deficient versus not androgen deficient) Exclusion Criteria: * Previous exposure to exogenous T, DHEA, clomiphen citrate, or other Selective Estrogen Receptor Modulators, or OTC or herbals (Treatment Naïve) * Use of opioid medication within 3 months prior to enrollment * Serious psychiatric disease or uncontrolled medical illness, as suspected from medical history or clinical examination * Use of any sex hormones or steroidal anabolic drug supplements (OTC or prescribed)(Treatment Naïve) * Incapable of giving informed consent or complying with protocol or unwilling to comply with protocol requirements * Diagnosis of prolactinoma