Dihydroboldenone (DHB)
Also known as: DHB, 1-Testosterone, Dihydroboldenon, 5alpha-Hydroxyboldenone, 1-Testo, Dihydroboldenone Cypionate
Own compound rather than a boldenone ester — relates to boldenone as DHT does to testosterone. Strong anabolic effect without aromatization, notorious for severe injection-site pain.
Substance family
Derived from dihydrotestosterone. They do not convert to estradiol, so no water retention — but also no estrogen of their own. Finasteride is useless against their hair loss, because they are already past the step it blocks. Hardest on the lipid profile.
Effects on
Which outcomes this substance acts on — descriptive, not a recommendation.
Strain profile
Where this substance is most likely to hit — a rough orientation, individually dependent on dose, duration and predisposition.
Ester variants
Same active substance, same risk profile — only release rate and injection rhythm differ. The ester determines the timing, not the effect.
| Variant | Half-life | Injection interval |
|---|---|---|
| CypionateDHB CypThe most common form. Fewer injections, which matters given how painful they tend to be. | ~5–6 days | 2× / week |
| PropionateDHB PropMore controllable, but the higher injection frequency multiplies the injection-site pain this compound is known for. | ~2 days | Every 2 days |
The ester also determines how long the substance stays active after the last injection — relevant when planning a recovery phase.
Dosing & protocols by goal
Rough orientation ranges as reported in harm-reduction literature — not an individual treatment plan. Doses are individual and open-ended; frequency depends on the ester or half-life.
Not medically indicated
MedicalDose
—
Frequency
—
Cycle length
—
No human-medical indication. DHB was never developed as a medicine and circulates only through underground labs.
Lean mass — Advanced
AdvancedDose
200–400 mg / week
Frequency
Cypionate 2× / week, propionate every 2 days
Cycle length
8–12 weeks
Alongside a testosterone base. Doses stay moderate because injection-site pain, not the effect, is usually what limits the cycle.
Higher doses
AdvancedDose
> 400 mg / week
Frequency
Varies
Cycle length
Varies
The injection volume required makes this rarely practicable — the local reactions become the limiting factor before the systemic side effects do.
Side effect & countermeasure
Typical problems and what you can do to reduce harm — at a glance. Does not replace medical monitoring.
Problem
Severe injection-site pain, the defining practical problem
Countermeasure
DHB is notorious for local reactions that can last for days — pain, swelling, hardening. Inject slowly into large muscles, rotate sites systematically, and plan the interval so an area has recovered. Distinguish it from infection: pain increasing after several days with redness, warmth and fever needs medical attention.
Problem
Severe drop in HDL, rise in LDL
Countermeasure
As a non-aromatizing compound it hits the lipid profile hard. Cardio, omega-3 and citrus bergamot as the base; with strongly deteriorated values, ezetimibe or pitavastatin under medical guidance. Measure a baseline before starting. If a statin is started, CoQ10 belongs alongside it — statins deplete it through the same pathway.
Problem
Elevated hematocrit
Countermeasure
Cardio and adequate hydration; donate blood if markedly elevated. Check hematocrithematocritThe percentage of blood made up of red cells — rises on androgens and thickens the blood. and hemoglobin every 6–8 weeks. Nattokinase supports fibrinolysis but does not lower the cell count — donation remains the measure that works.
Problem
Estradiol falls too low (joint pain, low libido, low mood)
Countermeasure
DHB does not aromatizearomatizeThe body converting testosterone into estrogen via the aromatase enzyme. — unlike boldenone, from which it is derived. A testosterone base is what supplies estradiolestradiolThe main estrogen — needed in men too, and damaging in both directions when out of range.; do not add an aromatase inhibitoraromatase inhibitorA drug that blocks the conversion of testosterone to estradiol. on top without measuring.
Problem
Confusion with boldenone
Countermeasure
DHB is not a boldenone esteresterA chemical chain attached to a steroid to slow its release from the injection site. but a separate compound with a different profile: boldenone aromatizesaromatizesThe body converting testosterone into estrogen via the aromatase enzyme., DHB does not. Dosing schemes and expectations from boldenone do not transfer.
Problem
Elevated blood pressure and strain on the kidneys
Countermeasure
Measure blood pressure at home, drink plenty, monitor creatinine and cystatin C. Medically, telmisartan, amlodipine or lisinopril, and low-dose tadalafil.
Problem
Underground-lab quality only
Countermeasure
There is no pharmaceutical-grade product. Purity and concentration vary considerably, and poor solvent quality makes the injection pain worse. Only sources with an independent analysis.
Overview
Dihydroboldenone, almost always abbreviated to DHB, is regularly mistaken for a boldenone ester. It is not. The relationship is the same as between testosterone and DHT: DHB is 5-alpha-reduced boldenone, a separate molecule with its own profile.
That distinction has practical consequences. Boldenone aromatizes, DHB does not. Boldenone acts slowly over a long ramp-up, DHB noticeably faster. Anyone transferring dosing schemes or expectations from one to the other will end up with a different substance than intended.
Mechanism of Action
DHB arises when boldenone is reduced by the 5-alpha-reductase enzyme — the same enzyme that converts testosterone to DHT. The additional double bond that boldenone carries relative to testosterone remains, which is why DHB is also known as 1-testosterone.
Binding to the androgen receptor is strong, and the anabolic effect is correspondingly pronounced — reported as stronger than testosterone at comparable doses. Because it cannot be converted to estradiol, there is no water retention, which produces the dry, hard appearance it is used for.
The absence of aromatization has the same consequence here as with all non-aromatizing compounds: without a testosterone base, no functioning estradiol level remains. Joint pain, loss of libido and flat mood under DHB are usually a sign of estradiol that is too low, not of the substance itself.
Injection-site pain is a property of the compound rather than of a particular product. It is caused by the substance itself and by the high concentration required, and it distinguishes DHB from almost every other injectable in this field.
Typical Context
DHB is used in lean mass phases and preparation phases, alongside a testosterone base and over eight to twelve weeks. Doses sit in the two to four hundred milligram range per week.
The point that determines practical use is not the effect but the tolerability at the injection site. Reports of pain lasting several days, hardening and swelling are the rule rather than the exception, and they are the reason many people abandon a planned cycle. This is worth knowing before the first injection, because it changes how the cycle has to be planned: fewer, larger muscles, systematic rotation, and enough interval for a site to recover.
There is no pharmaceutical-grade DHB. Everything in circulation comes from underground laboratories, which makes both purity and the quality of the solvent a factor — and poor solvent quality makes the pain considerably worse.
Side Effects & Risks
- Severe injection-site pain, swelling and hardening lasting days
- Severe drop in HDL, rise in LDL
- Elevated hematocrit
- Estradiol too low without a testosterone base
- Elevated blood pressure
- Strain on the kidneys
- Suppression of natural testosterone production
- Acne, accelerated hair loss with a genetic predisposition
- Consistently underground-lab quality
Blood Work & Monitoring
- Lipid profile (LDL, HDL, triglycerides) — baseline, during and after
- Hematocrit & hemoglobin — every 6–8 weeks
- Estradiol (sensitive) — watch for levels that are too low
- Total/free testosterone — to check the base
- Blood pressure — measured at home
- Creatinine and cystatin C — kidney function
- Liver values (ALT, AST, GGT)
Harm-Reduction Notes
- Do not confuse it with boldenone; it is a different compound with a different profile
- Plan the injection-site pain in: large muscles, systematic rotation, adequate interval
- Distinguish normal pain from infection — increasing pain after several days with redness, warmth or fever needs a doctor
- A testosterone base is not optional; without it there is no estradiol
- Measure a lipid baseline before starting; the HDL drop is pronounced
- Only sources with an independent analysis — solvent quality directly affects tolerability
- A post-cycle plan belongs in place before the first injection
Legal status by region
Regulation differs considerably between jurisdictions and changes over time. This is a rough orientation, not legal advice — check the rules that apply where you are.
| Region | Regulatory status |
|---|---|
| United States | Schedule III controlled substanceNo approved human indication; distribution is a federal offence. |
| EU / UK | Not approved for human useSome compounds exist only as veterinary products or not at all. |
| Canada / Australia | Controlled substanceNo human indication. |
| Parts of Asia & Latin America | Grey market, largely unregulatedAvailability does not imply pharmaceutical quality — underground-lab product dominates. |
| Competitive sport | Prohibited at all timesListed by WADA. |