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Ae22.5

17-Alpha-Estradiol Research

Mostly mechanism / observational

6 peer-reviewed studies

What the evidence says

Mostly mechanism / observational

Most 17-Alpha-Estradiol studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.

Most evidence is from medium-quality randomised trials published 1980–2024.

Based on 6 studies · 1 RCT

Confidence

Low confidence

By outcome

Lifespan & aging (male mice)Extended lifespan in male mice (a reproducible ITP result) via non-feminizing estrogen signaling; no human data and sex-specific/hormonal risk. · Not established (no human data)
Mostly mechanism / observational5 studies
Metabolic & inflammation
Too few graded studies2 studies
Safety profile
Too few graded studies2 studies

Active research area

2 studies in the last 5 years

198020022024

1RCT1980

Orfanos CE, Vogels L · Dermatologica (1980)

2Review2024

In plain English: Recommendations for lifestyle modifications, drugs, and dietary supplements to maintain good health and functionality into advanced age and to live longer will likely need to be tailored to the sex of the user.

Bartke A, Hascup E, Hascup K. · The world journal of men's health (2024)

Beneficial effects of rapamycin, an inhibitor of mTOR signaling, on mouse longevity are greater in females.
In contrast, several anti-aging compounds, including a weak estrogen, 17 alpha estradiol, extend longevity of male, but not female, mice.
Apparently, fundamental mechanisms of aging are not identical in females and males and it is essential to use both sexes in studies aimed at identifying novel anti-aging interventions.

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3Animal2016

In plain English: A weakly estrogenic agonist (17α-estradiol) produced longer lifespan in male mice.

Strong, Miller, Antebi, Astle, Bogue, Denzel · Aging cell (2016)

NIA ITP study: 17α-estradiol extended lifespan in male genetically heterogeneous mice
Minimal feminizing activity despite being an estradiol isomer
One of several agents tested; the male-specific result is notable

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4Animal2017

In plain English: 17α-Estradiol alleviated age-related metabolic and inflammatory dysfunction in male mice.

Stout, Steyn, Jurczak, Camporez, Zhu, Hawse · The journals of gerontology. Series A, Biological sciences and medical sciences (2017)

Mechanistic mouse study of 17α-estradiol in aging males
Improved metabolic parameters and reduced inflammation
Supports the metabolic basis of the lifespan effect

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5Animal2020

In plain English: 17α-Estradiol promoted ovarian aging in female mice, highlighting a sex-specific effect.

Isola, Zanini, Sidhom, Kopchick, Bartke, Masternak · Experimental gerontology (2020)

Study showing 17α-estradiol can accelerate ovarian aging in females
Directly demonstrates the sex-specific, female-harm caveat
Tempers any assumption of cross-sex benefit

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6Animal2024

In plain English: 17α-Estradiol alleviated high-fat-diet-induced inflammatory and metabolic dysfunction.

Bubak, Mann, Borowik, Pranay, Batushansky, Vieira de Sousa Neto · American journal of physiology. Endocrinology and metabolism (2024)

Recent mouse study of 17α-estradiol against diet-induced metabolic dysfunction
Reduced inflammation and improved metabolic markers
Reinforces the metabolic-aging mechanism

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View in Research Library

17-Alpha-Estradiol Research

Mostly mechanism / observational

[Local therapy of androgenetic alopecia with 17 alpha-estradiol. A controlled, randomized double-blind study (author's transl)].

Responses to Many Anti-Aging Interventions Are Sexually Dimorphic

Longer lifespan in male mice treated with a weakly estrogenic agonist, an antioxidant, an α-glucosidase inhibitor or a Nrf2-inducer.

17α-Estradiol Alleviates Age-related Metabolic and Inflammatory Dysfunction in Male Mice Without Inducing Feminization.

17α-Estradiol promotes ovarian aging in growth hormone receptor knockout mice, but not wild-type littermates.

17α-Estradiol alleviates high-fat diet-induced inflammatory and metabolic dysfunction in skeletal muscle of male and female mice.