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The relationship between libido and testosterone levels in aging men.

Thomas G Travison1, John E Morley, Andre B Araujo

  • 1New England Research Institutes, 9 Galen Street, Watertown, Massachusetts 02472, USA. ttravison@neriscience.com

The Journal of Clinical Endocrinology and Metabolism
|May 4, 2006
PubMed
Summary

Serum testosterone (T) levels are strongly linked to libido in aging men at a population level. However, individual reports of low libido may not reliably indicate low T levels.

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Area of Science:

  • Endocrinology
  • Men's Health
  • Aging Research

Background:

  • Serum testosterone (T) is known to influence libido.
  • The precise strength of this relationship in community-dwelling men requires further investigation.

Purpose of the Study:

  • To evaluate the strength and statistical significance of the association between self-reported libido and serum T concentrations in aging men.

Main Methods:

  • A community-based epidemiological study involving 1632 men aged 40-70 years at baseline.
  • Libido assessed using a 14-point scale; low libido defined as a score <7.
  • Serum total and bioavailable T levels were measured across three data collection waves over 15 years.

Main Results:

  • A significant association was observed between libido and T levels.

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  • A small difference in mean T levels was found between men with and without low libido.
  • Men reporting low libido had a modestly increased probability of having low T levels.

    • Conclusions:

    • Libido and serum T concentrations demonstrate a strong relationship at the population level.
    • The utility of individual reports of reduced libido as a diagnostic indicator for low T levels remains uncertain.