Overview / Research screener / 17α-Estradiol
Geroprotective Small Molecules
17α-Estradiol (17α-E2), longevity use
endocrine hormonalinflammation redox
Approved medicine for another condition in 1 of 9 markets tracked.
Evidence so far is from 1 human trial with no pre-planned main endpoint and animal studies.
In people: 1 trial (35 people, 24 weeks). Doses studied: 2 mg estradiol valerate (100 mg progesterone in the combined arm).
Evidence map
main endpoints improvedno effectworsenedmixedobservationalanother intervention, contextsize not reported
Higher rows are closer to a person taking this. A case that rests only on the lower rows rests on animals or cells.
What each study measured
Harms reported
Where it is available
If you are tracking this yourself
Repeatability is whether the same person measured twice gets the same number. It is not statistical significance. It informs study or protocol design only, never advice for a person.
What would change this picture
Trials under way
Every study (12)
- T7 Wolf 2005 Estradiol or estradiol/progesterone treatment in older women: no strong effects on cognition doi:10.1016/j.neurobiolaging.2004.09.012
- T3 Mondal 2022 17α-estradiol, a lifespan-extending compound, attenuates liver fibrosis by modulating collagen turnover rates in male mice doi:10.1101/2022.06.16.496423
- T3 Foster 2003 Interaction of age and chronic estradiol replacement on memory and markers of brain aging doi:10.1016/S0197-4580(03)00014-9
- T3 Christensen 2020 Aging Reduces Estradiol Protection Against Neural but Not Metabolic Effects of Obesity in Female 3xTg-AD Mice doi:10.3389/fnagi.2020.00113
- T3 Costoff 1985 Effects of estradiol and estradiol-progesterone treatment on gonadotropin secretion in castrate aging female rats doi:10.1016/0378-5122(85)90059-3
- T3 Shen 2021 Cap‐independent translation: A shared mechanism for lifespan extension by rapamycin, acarbose, and 17α‐estradiol doi:10.1111/acel.13345
- T3 Strong 2016 Longer lifespan in male mice treated with 17α-estradiol, Protandim, NDGA, acarbose and other agents doi:10.1111/acel.12496
- T3 McGill 2025 Protection against APOE4-associated phenotypes with the longevity-promoting intervention 17α-estradiol in middle-aged male mice doi:10.1038/s43856-025-00942-3
- T3 Mann 2020 Health benefits attributed to 17α-estradiol, a lifespan-extending compound, are mediated through estrogen receptor α doi:10.1101/2020.06.02.130674
- TX Petrone 2014 17β-Estradiol and Inflammation: Implications for Ischemic Stroke doi:10.14336/AD.2014.0500340
- TX Vermeulen 2002 Estradiol in elderly men doi:10.1080/tam.5.2.98.102
- TX Chen 2025 Commentary: Association between serum estradiol levels and cognitive function in older women: a cross-sectional analysis doi:10.3389/fnagi.2025.1559647