DHB (1-Testosterone): A Potent Androgen With a Painful Reputation
Last updated: October 3, 2026
Dihydroboldenone (DHB, 1-testosterone) is the 5α-reduced analog of boldenone. In lab assays it bound selectively to the androgen receptor; in rats an equimolar dose matched testosterone propionate in androgenic and anabolic potency and increased liver weight (Friedel et al., Toxicol Lett 2006, PMID: 16621347). Human outcomes have not been studied clinically. Users commonly describe it as one of the most painful injectable steroids. This reference covers its pharmacology, practical considerations, and harm-reduction data.
No Clinical Data
5α-Reduced Structure
How DHB Works
DHB is the 5α-reduced form of boldenone (EQ), structurally analogous to how DHT relates to testosterone.
Boldenone (Equipoise) is the parent compound; DHB is its 5α-reduced metabolite, also called dihydroboldenone or 1-testosterone (not the same as testosterone despite the name). The 1,2-double bond distinguishes it from regular 5α-dihydrotestosterone.
As a 5α-reduced steroid, DHB is not a substrate for aromatase, so it is not expected to convert to estradiol — a structural inference, since no study cited here measured estrogen in DHB users. Users describe a "dry" look, but water retention and bloating have not been measured clinically. Any co-administered testosterone will still aromatize normally.
Users widely report severe, prolonged post-injection pain, and commonly attribute it to DHB being hard to keep in solution (it can crash out of carrier oil); no cited study has measured its solubility or tested that cause. Mitigation strategies reported in community practice (untested): dilution with benzyl alcohol, MCT/GSO mix, warming the oil before injection, and lower concentrations. Higher concentrations are commonly reported as more painful.
Unlike Anadrol, Superdrol, or Dianabol, DHB is not 17α-alkylated and is typically used by injection. That does not make it liver-safe: in rats, 1-testosterone significantly increased liver weight, which testosterone propionate did not (Friedel et al., 2006). Its liver safety in humans has not been studied clinically.
What the Evidence Shows
DHB has minimal formal research. The one study cited on this page combined lab receptor assays with rat experiments (Friedel et al., 2006); human outcome data here is community-based and anecdotal (labeled).
Risks & Side Effects
Key Takeaways
- 5α-reduced form of boldenone — structural analog to DHT/testosterone relationship
- Not expected to aromatize (5α-reduced structure); the "dry" look is user-reported, not measured
- In rats, as androgenic and anabolic as testosterone propionate, and it raised liver weight (Friedel et al., 2006)
- Not 17α-alkylated, unlike oral steroids such as Anadrol
- Users report PIP as the main practical problem, varying with concentration and formulation (community reports)
- Users commonly report severe post-injection pain, sometimes lasting days (not clinically studied)
- Very limited clinical research — safety profile largely anecdotal
- Community reports describe significant HPTA suppression; no cited study measured it or tested post-cycle recovery
- Higher-concentration formulations are commonly reported as more painful
- Injection site abscesses possible if sterility is not maintained
🛒 Monitoring Supplies
Bloodwork and blood-pressure tracking are common harm-reduction practices; no study cited here evaluated them for DHB.
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This page is for educational and harm-reduction purposes only. Dihydroboldenone (DHB / 1-testosterone) is a Schedule III controlled substance under the Anabolic Steroid Control Act in the United States. It has not been approved by the FDA for any medical use. Unauthorized possession is illegal. This content does not constitute medical advice. Always consult a licensed physician before using any anabolic agent.
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