OtherOralSpirostanol saponinNon-hormonalBrassinosteroid analog

25R-Spirostenol

Also known as (25R)-spirost-5-en-3-ol type · spirostenol

Written by enwyReviewed 5 Aug 20261 sources0 comments

A spirostanol saponin closely related to laxogenin, marketed in the same 'natural anabolic' category with claims of enhanced protein synthesis. It is non-hormonal and, like the rest of this class, lacks any meaningful human evidence.

01 Overview

25R-Spirostenol is a spirostane-type plant saponin sold alongside laxogenin as a purported brassinosteroid-like anabolic. Marketing overlaps heavily with laxogenin products, and the two are sometimes used interchangeably or stacked.

The biological rationale rests on plant and cell-culture brassinosteroid research showing anabolic signalling; no controlled human trials support strength, muscle, or safety claims. It is non-androgenic and not scheduled as a steroid, with the same uncertain dietary-supplement status.

02 Mechanism

Proposed brassinosteroid-like modulation of protein-synthesis signalling from preclinical models; non-androgenic with no sex-hormone conversion.

03 Dosing

Tier	Dose	Route	Notes
Label-typical	50–100 mg/day	Oral	Common label dose; efficacy unproven.

04 Effects

Effect	Magnitude	Evidence
Anabolic signalling (claimed)Brassinosteroid-type rationale from cell studies; no human confirmation.	Unquantified in humans	Preclinical
Non-hormonal profileNo expected androgenic action or HPTA suppression.	No androgen conversion	Preclinical

05 Side effects

Effect	Severity	Frequency	Evidence	Countermeasures
Unknown safety profileNo human safety or efficacy data.	Mild	Unknown	Unconfirmed
Mild GI upsetOccasional nausea from saponins.	Mild	Uncommon	Anecdotal

06 Legal status

United States

Contested supplement status

Not a scheduled steroid; uncertain dietary-supplement status. · as of Jan 2026

07 References

Spirostanol saponins and brassinosteroid analogsPhytochemistry / brassinosteroid literature

08 Discussion0 comments

Create account

Discussion is moderated. No sourcing, vendor names or price talk — those comments are removed, and repeat posts are banned.

This page is reference information, not medical advice. Doses and protocols are documented as they appear in the clinical literature and in practice — describing them is not a recommendation to use them. Countermeasures listed here are not a substitute for a physician. Legal status varies by jurisdiction and changes.