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Combining Behavioral Endocrinology and Experimental Economics: Testosterone and Social Decision Making
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Testosterone Therapy: What We Have Learned From Trials.

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Testosterone replacement therapy (TRT) can improve sexual function in men with hypogonadism. When properly diagnosed and managed, TRT is safe and does not increase cardiovascular or prostate risks, though benefits in other areas require further study.

Keywords:
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Area of Science:

  • Endocrinology
  • Men's Health
  • Geriatrics

Background:

  • The role and safety of testosterone (T) replacement therapy (TRT) in men remain subjects of ongoing debate, particularly concerning cardiovascular (CV) risks and overall efficacy.
  • Existing literature presents conflicting evidence regarding the benefits and potential risks associated with TRT.

Purpose of the Study:

  • To systematically review and critically analyze existing literature on the benefit-risk ratio of TRT in aging men.
  • To evaluate the evidence for TRT's effects on various health outcomes and safety parameters.

Main Methods:

  • A comprehensive literature search of the PubMed database was conducted.
  • Included randomized controlled trials (RCTs) and observational studies evaluating TRT's effects on diverse outcomes.
  • Data from RCTs were compared with observational studies, and meta-analyses were reviewed.

Main Results:

  • TRT significantly improves erectile function, libido, and sexual activity in men diagnosed with hypogonadism (total T < 12 nM).
  • Evidence for TRT's impact on metabolic, mood, cognitive, mobility, and bone health is inconsistent.
  • When hypogonadism is correctly diagnosed and managed, TRT is not associated with increased CV, venous thromboembolism, or prostate risks.

Conclusions:

  • TRT is a safe and effective treatment for improving sexual function in men with confirmed hypogonadism.
  • TRT is not recommended for weight reduction or metabolic enhancement.
  • Further large-scale studies are needed to clarify long-term CV and prostate safety, especially in complex patient populations and those with a history of prostate cancer.