Anabolic steroidAndrogenInjectable19-nortestosteroneProhormone

Bolandiol Dipropionate

Also known as 19-Nor-4-androstenediol dipropionate · Estr-4-ene-3β,17β-diol dipropionate · Bolandiol dipropionate

Written by enwyReviewed 5 Aug 20261 sources0 comments

The dipropionate ester of bolandiol (19-nor-4-androstenediol / estr-4-ene-3β,17β-diol), an injectable 19-nor prohormone that converts toward nandrolone. Historically used in some European tonics; the diester provides a longer-acting depot. Carries the nandrolone-family profile.

01 Overview

Bolandiol is 19-nor-4-androstenediol (estr-4-ene-3β,17β-diol), a prohormone that converts in vivo to nandrolone (19-nortestosterone). The dipropionate diester here esterifies both hydroxyls for a longer-acting injectable depot, distinct from the unesterified bolandiol catalogued separately.

Bolandiol appeared historically in some European combination tonics and later as a nandrolone-precursor prohormone. Because its active metabolite is nandrolone, it inherits the nandrolone profile: good lean-mass anabolism, mild aromatisation to a weak estrogen, progestogenic activity, and long-lasting detectability (a persistent anti-doping concern for the 19-nor family).

02 Mechanism

Prohormone/ester depot: hydrolysis of the propionate esters releases bolandiol, which is oxidised to nandrolone, a 19-nortestosterone androgen receptor agonist with progestogenic activity and weak aromatisation.

03 Dosing

Tier	Dose	Route	Notes
Anecdotal	100–300 mg/wk	IM	Anecdotal, based on nandrolone-equivalent targeting after conversion.

Ester comparison

Ester	Half-life	Injection freq.	Testosterone by mass

04 Effects

Effect	Magnitude	Evidence
Lean mass gainConverts to nandrolone, giving the familiar 19-nor lean-mass and recovery benefits.	Nandrolone-like	Preclinical
Joint/connective comfortUsers report nandrolone-typical joint relief; not formally studied for this ester.	Reported	Anecdotal

05 Side effects

Effect	Severity	Frequency	Evidence	Countermeasures
Progestogenic / HPTA suppressionStrong suppression plus progestogenic effects (libido loss, potential gynecomastia) from the nandrolone metabolite.	Severe	Universal	Preclinical
Prolonged detectabilityNandrolone metabolites (19-norandrosterone) remain detectable for many months.	Mild	Universal in tested athletes	Observational

06 Legal status

United States

Schedule III controlled

Anabolic steroid / prohormone under the CSA. · as of Jan 2026

WADA S1 anabolic agent

as of Jan 2026

07 References

Anabolic steroids and their derivatives (nandrolone precursors)NAPRA regulatory listing

08 Discussion0 comments

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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.