Stanozolol (Winstrol)
Also known as: Winstrol, Winny, Winni, Stanozolol, Stanabol, Winstrol Depot
DHT derivative available both orally and injectable, used for hardness in the final weeks — notorious for dry, painful joints and for the most severe lipid deterioration of any common compound.
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.
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.
Medical (hereditary angioedema)
MedicalDose
2–6 mg / day
Frequency
Daily
Cycle length
Medically supervised
Was used for hereditary angioedema and, historically, for anemia. Replaced by better-tolerated therapies today.
Definition phase — Intermediate
IntermediateDose
30–50 mg / day
Frequency
Oral split into 2 doses, injectable daily
Cycle length
4–6 weeks
Kept short, primarily because of liver strain and the lipid profile. Longer runs sharply increase both.
Higher doses
AdvancedDose
> 50 mg / day
Frequency
Varies
Cycle length
4–6 weeks
Joint problems and liver values deteriorate markedly, while the visual gain is minimal.
Side effect & countermeasure
Typical problems and what you can do to reduce harm — at a glance. Does not replace medical monitoring.
Problem
Extreme drop in HDL — the most severe of any commonly used compound
Countermeasure
Values below 10 mg/dl are documented under stanozolol. Cardio, omega-3 and citrus bergamot as the base; with strongly deteriorated values, ezetimibe or pitavastatin under medical guidance. Measure a baseline and keep the duration short — this effect is not manageable by supplements alone. If a statin is started, CoQ10 belongs alongside it — statins deplete it through the same pathway.
Problem
Dry, painful joints and increased risk of tendon injury
Countermeasure
Stanozolol reduces synovial fluid and collagen synthesis while strength rises quickly — a combination that overloads tendons. Do not push maximal loads during use; keep progression conservative even when it feels easy.
Problem
Considerable liver strain from 17-alpha-alkylation
Countermeasure
Both the oral and the injectable form are 17-alpha-alkylated17-alpha-alkylatedA chemical modification that lets a steroid survive being swallowed — at the liver's expense. — injecting it does not spare the liver, a widespread misconception. Check ALT, AST and GGT before and during use, avoid alcohol, do not combine with other orals, limit to 4–6 weeks. TUDCA at 500–1000 mg daily addresses the cholestaticcholestaticBile backing up in the liver because its flow is obstructed — the specific liver injury oral steroids cause. mechanism directly; NAC supports the antioxidant system alongside it.
Problem
Markedly elevated blood pressure
Countermeasure
Measure at home regularly. Cardio, control salt and water balance; medically, telmisartan, amlodipine or lisinopril, and low-dose tadalafil.
Problem
Estradiol falls too low, compounding the joint problem
Countermeasure
Stanozolol does not aromatizearomatizeThe body converting testosterone into estrogen via the aromatase enzyme.. Low estradiolestradiolThe main estrogen — needed in men too, and damaging in both directions when out of range. worsens exactly the joint symptoms the substance already causes — never combine with an aromatase inhibitoraromatase inhibitorA drug that blocks the conversion of testosterone to estradiol. without measuring.
Problem
Accelerated hair loss with a genetic predisposition
Countermeasure
As a DHTDHTA far more potent androgen the body makes from testosterone — responsible for hair loss and prostate effects. derivative it acts directly on the hair follicle; finasteride is ineffective here. Anyone with a predisposition is choosing the wrong substance. What does apply here is minoxidil, which works independently of DHT, or a topical receptor blocker such as RU58841 or topical spironolactone; ketoconazole treats the scalp inflammation androgens add on top.
Problem
Severe injection-site pain with the aqueous suspension
Countermeasure
The injectable form is a crystal suspension in water and is considerably more painful than oil-based preparations. There is no pharmacological advantage over the tablet — the liver burden is identical.
Overview
Stanozolol, universally known as Winstrol, is a DHT derivative with an unusual structure: a pyrazole ring fused to the steroid skeleton. It is one of the few anabolic steroids available both as a tablet and as an injection, and one of the few where that choice makes no difference to the liver.
In the bodybuilding context it is used in the last weeks before a competition for a dry, hard appearance. Its side-effect profile is considerably harsher than its reputation as a "cutting compound" suggests — stanozolol produces the most severe lipid deterioration of any commonly used substance, and its effect on joints and tendons is a genuine injury risk rather than a comfort issue.
Mechanism of Action
Stanozolol binds to the androgen receptor and does not aromatize; no estradiol arises from it. The pyrazole ring makes it resistant to enzymatic breakdown, and the 17-alpha-alkylation makes it orally available.
The point most commonly misunderstood: the injectable form is 17-alpha-alkylated as well. Unlike other injectables, where an oil-based ester bypasses the liver on first pass, stanozolol carries the liver-relevant modification in both forms. Injecting it therefore does not reduce hepatic strain in any meaningful way — a belief that persists widely and leads people to run it longer than they otherwise would.
Its effect on connective tissue works in two directions at once. Stanozolol reduces the production of synovial fluid and appears to inhibit collagen synthesis, while muscular strength increases rapidly. Tendons and ligaments adapt far more slowly than muscle under normal circumstances; here they are actively weakened while the load rises. This is the mechanism behind the tendon ruptures repeatedly described in connection with this substance.
Typical Context
Stanozolol appears in the last four to six weeks of a preparation phase, orally or injected, essentially always alongside a testosterone base. The short duration is not caution for its own sake — liver values and lipid profile deteriorate quickly enough that longer runs become difficult to justify.
The visual effect depends on body fat, as with drostanolone. At higher body fat, the substance delivers its side effects without a visible result.
Side Effects & Risks
- Extreme drop in HDL, marked rise in LDL — the most severe of any common compound
- Dry, painful joints; increased risk of tendon and ligament injury
- Considerable liver strain in both the oral and the injectable form
- Markedly elevated blood pressure
- Estradiol too low, worsening the joint symptoms
- Accelerated hair loss with a genetic predisposition
- Severe injection-site pain with the aqueous suspension
- Suppression of natural testosterone production
- Acne, oily skin
Blood Work & Monitoring
- Lipid profile (LDL, HDL, triglycerides) — the key value; baseline, during and 6–8 weeks after
- Liver values (ALT, AST, GGT) — baseline and during use, regardless of the form used
- Blood pressure — measured at home, regularly
- Estradiol (sensitive) — watch for levels that are too low
- Total/free testosterone — to check the base
- Hematocrit & hemoglobin
Harm-Reduction Notes
- Injecting does not spare the liver — both forms are 17-alpha-alkylated
- Limit duration to 4–6 weeks; liver values and lipids deteriorate quickly
- Do not attempt maximal lifts during use; tendon load is the underlying risk, and strength rises faster than connective tissue can adapt
- Measure a lipid baseline before starting, otherwise the extent of the change cannot be judged
- Do not combine with other oral compounds; liver strain is additive
- Avoid alcohol during use
- Do not add an aromatase inhibitor without measuring; low estradiol worsens the joint symptoms
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 substancePrescription required; possession without one is a federal offence. |
| EU / UK | Prescription-only medicineApproved for defined medical indications; supply without prescription is an offence. |
| Canada / Australia | Controlled substance, prescription-onlyImport for personal use is restricted. |
| Parts of Asia & Latin America | Pharmacy availability variesSome countries treat it as pharmacy-dispensed rather than strictly prescription-bound. Enforcement is inconsistent and rules change. |
| Competitive sport | Prohibited at all timesListed by WADA; national anti-doping law applies in addition. |