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Hum Reprod. 2002 Dec;17(12):3251-3.

Population variation in age-related decline in male salivary testosterone.

Author information

1
Department of Anthropology, Harvard University, Cambridge, MA, USA. pellison@fas.harvard.edu

Abstract

BACKGROUND:

Age-related declines in free and bioavailable testosterone are frequently reported for Western populations, but interpopulation variation in this pattern has not previously been investigated.

METHODS:

Salivary testosterone was measured using a consistently applied protocol on morning samples collected from men in four populations (USA, Congo, Nepal, and Paraguay) representing different geographical, ecological, and cultural settings.

RESULTS:

Mean testosterone levels varied significantly between the four populations. The mean testosterone differences between populations were greatest for young men (aged 15-30 years) and insignificant for older men (aged 45-60 years). The slope of age-related decline in testosterone was significant in the USA and Congolese participants, but not in the Nepalese or Paraguayan participants.

CONCLUSIONS:

Age patterns of testosterone decline vary between populations primarily as a result of variation in the peak levels attained in young adulthood. The potential consequences of this variation for other aspects of male health deserve investigation.

PMID:
12456632
DOI:
10.1093/humrep/17.12.3251
[Indexed for MEDLINE]

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