Men with normal testosterone levels live longer

Among 3690 community-dwelling men aged 70–89 years whose hormones were assayed at baseline, 26% died over five years of follow-up.

Researchers found a U-shaped association between total testosterone and all-cause mortality. Men whose circulating testosterone levels in the range 9.8nmol/L to 15.8nmol/L were most likely to survive.

However, they also found higher dihydrotestosterone levels were associated with reduced risk of ischaemic heart disease mortality.

J Clin Endocrinol Metab 2013; online 20 November

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