Research

Hormonal

Serum estrone (E1) and estradiol (E2) are positively associated with bone mineral density (BMD) in elderly men, independent of testosterone levels.

Elderly men should understand that estrogen (derived from testosterone) is vital for bone health. Low estrogen levels, even if testosterone is normal, can contribute to bone loss. Monitoring bioavailable estrogen may be as important as testosterone for preventing osteoporosis in aging men.

ModerateSupportsMEDIUM confidence
E1 and E2 were both positively, independently associated with BMD... The positive relation between T and BMD was independent of E2.
Annewieke W. van den Beld et al. · The Journal of Clinical Endocrinology & Metabolism · 2000

Why this rating

Cross-sectional observational study; associations are significant but causality is precluded by study design.

Source

Measures of Bioavailable Serum Testosterone and Estradiol and Their Relationships with Muscle Strength, Bone Density, and Body Composition in Elderly Men*

Annewieke W. van den Beld et al. · The Journal of Clinical Endocrinology & Metabolism · 2000

DOI 10.1210/jcem.85.9.6825

cross_sectional · n=403Cited 607×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

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