17α-Estradiol
Aliases: 17alpha-Estradiol
Last verified: 2026-09-23
The short version
A non-feminizing estradiol stereoisomer — ITP: lifespan extension in male mice (+19%) without feminization; metabolic and immune benefits. Key fact: No controlled human trials exist. Everything known about 17α-Estradiol in humans comes from indirect sources and self-reports. Status: research chemical. Not approved; research chemical.
Identity & type
- Molecular type
- mali molekul
- Origin
- A non-feminizing estradiol stereoisomer — ITP: lifespan extension in male mice (+19%) without feminization; metabolic and immune benefits.
Mechanism of action
Acts via ERα with a different profile; reduces inflammation and improves metabolism.
not confirmed in humans
Dosing & routes
Official / clinical context
No approved official document exists for 17α-Estradiol. Any protocols mentioned are to be read as information, not as a recommendation.
Regulator-approved labeling and published study designs — never a recommendation.
Community-reported practice
No human regimens. No human experiences; purely preclinical interest.
Unverified self-reports. Not medical advice. Not endorsement.
Expected effects (community)
No human experiences; purely preclinical interest.
Protocol — official vs community
Official / label
No approved use (pharmaceutical 17α-E2 exists for veterinary indications). ITP male-only lifespan signal drives interest.
Duration: Preclinical only.
The most controversial ITP result: robust male, null female lifespan extension in mice.
Community (anecdotal)
Topical formulations appear in self-experimentation circles; no standardized protocol.
- Cycle:
- Undefined.
- Break:
- Undefined.
An unestablished human protocol for an unestablished human indication — the definition of frontier self-experimentation.
Human evidence
No controlled human trials exist. Everything known about 17α-Estradiol in humans comes from indirect sources and self-reports.
Preclinical evidence
ITP preclinical program; no human studies.
Known risks
- Unknown in humans.characterized
Teal: characterized in clinical/labeling contexts. Amber: theoretical or reported outside controlled settings.
Unknowns & evidence gaps
- All human pharmacokinetics, safety and efficacy
Frequently asked questions
References
Systematic references are being expanded; verify sources directly before any decision.