Anabolic steroidAndrogen19-nortestosteroneProhormoneOralNon-methylated

19-Nor-DHEA

Also known as 19-Nor-DHEA · 19-nor-androstenedione precursor · Nandrolone prohormone

Written by enwyReviewed 4 Aug 20262 sources0 comments

19-Nor-DHEA (19-nor-androst-4-ene-3β-ol,17-one) is a non-methylated prohormone that converts to nandrolone (19-nortestosterone). Marketed for lean-mass gains, it carries nandrolone's progestogenic risk profile — potential libido loss and mood effects — with efficacy resting entirely on anecdote.

01 Overview

19-Nor-DHEA is a prohormone designed to yield nandrolone in the body via 3β-HSD and 17β-HSD conversion. Because the active hormone is 19-nortestosterone, users expect nandrolone-like effects: steady lean-mass accrual, joint-comfort reports, and relatively low aromatisation, but with the progestogenic activity characteristic of 19-nor compounds. It was a common ingredient in early-2010s 'bulking' prohormone stacks.

There are no controlled human efficacy studies of the prohormone itself; its rationale is inferred from the well-studied pharmacology of nandrolone plus user reports. It converts inefficiently and suppresses the HPTA. The 19-nor structure raises concern for progestogenic side effects such as reduced libido ('deca dick') and prolactin-related issues even though the parent is a prohormone.

02 Mechanism

Converts to nandrolone (19-nortestosterone), a mildly aromatising anabolic androgen with progestogenic activity that binds the androgen and progesterone receptors.

03 Dosing

Tier	Dose	Route	Notes
Common (marketed)	100–400 mg/day	Oral	Labelled supplement dosing, typically split through the day.

Ester comparison

Ester	Half-life	Injection freq.	Testosterone by mass

04 Effects

Effect	Magnitude	Evidence
Lean mass gainNandrolone-like steady gains reported over longer 6-8 week runs.	slow, steady	Anecdotal
Joint comfortUsers report improved joint comfort, a hallmark associated with nandrolone.	subjective	Anecdotal

05 Side effects

Effect	Severity	Frequency	Evidence	Countermeasures
Progestogenic libido lossReduced libido and erectile difficulty ('deca dick') reported, linked to progestogenic activity.	Moderate	Common	Anecdotal
HPTA suppressionMeaningful testosterone suppression requiring recovery support.	Moderate	Near-universal	Anecdotal

06 Legal status

United Kingdom

Class C

Anabolic steroid under the Misuse of Drugs Act. · as of Jan 2026

United States

Schedule III controlled

Nandrolone precursors covered as anabolic steroids under federal law. · as of Jan 2026

07 References

Nandrolone precursor prohormones: metabolism and detectionPubMed

Pharmacology of nandrolonePubMed

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.