Exogenous Estrogen in Men

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Old study that looked at exogenous estrogen (among other things) in men targeted at reducing mortality due to cardiac events:

The Coronary Drug Project: findings leading to discontinuation of the 2.5-mg/day estrogen group.

The purpose of the Coronary Drug Project, a national collaborative study, is to evaluate long-term effects of several drug regimens influencing lipid metabolism, compared with placebo, in men originally aged 30-64 years who had recovered from 1 or more episodes of myocardial infarction. 53 clinical centers recruited 8341 patients from 1966-1969; the men were randomly assigned to the project's 6 groups. 2 of the study regimens - 5.0 mg/day of estrogen (ESG2) and 6.0 mg/day of dextrothyroxine (DT4) were discontinued in 1970 and 1971, respectively, due to trends indicative of adverse effects. As of February 1, 1973, with an average followup of 56 months, data on the 2.5 mg/day estrogen group (ESG1) indicated no evidence of an overall positive therapeutic effect in terms of the project's primary end point, mortality from all causes.
 

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Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

Free Testosterone

The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

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