Turanabol - Zyvex Pharmaceuticals

Zyvex Pharmaceuticals
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Turanabol 20 - Zyvex Pharmaceuticals
4-Chlorodehydromethyltestosterone 20 mg/tab | Zyvex Pharmaceuticals | Oral Steroid
Class
Oral Turinabol
17-aa oral, no aromatization
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Anabolic Ratio
~53:6
mild androgenic profile
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Primary Use
Lean Mass + Strength
dry gains, no water retention
Suppression
Moderate
PCT required after cycle

Daily Dose
20-40 mg
once daily
Cycle Length
6-8 weeks
typical oral cycle
PCT Start
24-48 hrs
after last tablet
Aromatizes
No
no AI required
Manufacturer Zyvex Pharmaceuticals
Brand Turinabol
Substance 4-Chlorodehydromethyltestosterone
Concentration 20 mg/tab
Pack Size 100 tabs
Out of Stock

Turanabol 20: Lean Gains Without the Bloat

Turanabol is the oral steroid that delivers real anabolic results without the water retention, estrogen side effects, or bloat that most oral steroids carry with them. Its active compound, 4-chlorodehydromethyltestosterone, is structurally derived from Dianabol but modified at the molecular level in a way that eliminates aromatization entirely. The result is a compound that builds lean, dry muscle with no subcutaneous water accumulation - what you gain on a Turanabol cycle, you keep when it ends.

Turanabol's history is as distinctive as its chemistry. It was the cornerstone of the East German State Plan 14.25, the government-run doping program that powered DDR athletes to Olympic dominance throughout the 1970s and 1980s. The compound was chosen specifically because it could not be detected by the drug tests of the era - a property that turned out to be predictive of its extremely long detection time even by modern standards. Today it is used in bodybuilding and strength sports for its reliable, clean anabolic output at doses that remain manageable in terms of side effects.

Oral Steroid No Aromatization Lean Dry Gains 17-Alpha Alkylated East German Legacy

About the Compound

Turanabol's active substance, 4-chlorodehydromethyltestosterone, was synthesized in East Germany in the early 1960s as a deliberate engineering project: take Dianabol, one of the most potent oral anabolic steroids available, and modify it to pass undetected in drug testing while retaining its anabolic properties. The chlorine atom added at the C4 position achieved something the scientists may not have fully anticipated - it not only changed the detection window but fundamentally altered the compound's pharmacology, eliminating aromatization and dramatically reducing androgenic activity relative to its anabolic effect.

The resulting anabolic-to-androgenic ratio of approximately 53:6 represents one of the most favorable ratios among oral steroids. By comparison, testosterone benchmarks at 100:100 and Dianabol sits at approximately 90-210:40-60. Turanabol's androgenic component is low enough that androgenic side effects - hair loss, acne, aggression - are substantially reduced compared to most oral anabolics. The anabolic activity, while not equal to Dianabol, is sufficient to produce meaningful lean mass and strength gains over a 6-8 week cycle.

Active Substance
4-Chlorodehydromethyltestosterone
Concentration
20 mg per tablet
Anabolic:Androgenic Ratio
~53:6
Half-Life
~16 hours
Administration
Oral, once daily
Aromatization
None
Hepatotoxicity
Yes - 17-alpha alkylated
Detection Time
6-12+ weeks (metabolites detected longer)
Typical Cycle Length
6-8 weeks
PCT Required
Yes

How the Chloro Group Changes Everything

To understand why Turanabol behaves differently from Dianabol, the difference comes down to a single chlorine atom. Dianabol (methandrostenolone) is a modified testosterone molecule with a methyl group added at C17 for oral bioavailability and a double bond at C1-C2. Turanabol takes this exact structure and adds a chlorine atom at the C4 position. That one change prevents the aromatase enzyme from acting on the molecule - the chloro group physically blocks the enzyme's binding site. The consequence is that Turanabol produces zero estrogen through aromatization, which means no water retention, no estrogen-driven gynecomastia, and no need for an aromatase inhibitor.

The androgenic activity reduction comes from how the chlorine substitution affects binding affinity at the androgen receptor relative to anabolic receptor activity. Turanabol still binds androgen receptors and produces anabolic effects, but the receptor binding geometry favors anabolic signaling over androgenic signaling more than Dianabol does. This explains the dramatically lower androgenic score. For the practical user, this means the compound can be used at lower doses with a more favorable anabolic-to-side-effect ratio than Dianabol, and at higher doses the androgenic liability does not escalate as rapidly.

Dosing and Administration

Experience Level Daily Dose Cycle Length Notes
Beginner 20 mg/day 6 weeks Single tablet, assess response
Intermediate 30-40 mg/day 6-8 weeks Standard performance dose
Advanced 50-60 mg/day 8 weeks max Liver monitoring required
Women 5-10 mg/day 4-6 weeks Low virilization risk at these doses

Dosing and Cycle Protocol

Turanabol's half-life of approximately 16 hours means once-daily dosing maintains adequately stable blood levels throughout the day. Many users take the full daily dose in the morning or pre-workout. Some split it into two doses (morning and afternoon) to smooth blood level curves, though the difference at 20-40 mg/day is unlikely to be meaningfully felt. The compound does not need to be taken with food, though taking it with a meal reduces any gastrointestinal discomfort from the tablet.

A standard Turanabol-only cycle runs 6-8 weeks at 20-40 mg/day alongside a testosterone base. Running any anabolic without testosterone base support is inadvisable - Turanabol suppresses natural testosterone production, and without exogenous testosterone the user will experience androgen-deficient sides (low libido, poor recovery, mood) before the cycle ends. Testosterone Propionate or Testosterone Enanthate at TRT dose (100-200 mg/week) provides androgen support without adding significant estrogenic load given Turanabol's non-aromatizing nature. Liver support supplements (TUDCA or milk thistle) are standard practice throughout a 17-aa oral cycle.

Side Effects and Risk Management

Side Effect Background Management
Hepatotoxicity 17-alpha alkylation increases liver enzyme load; ALT/AST elevation is dose and duration dependent Limit cycles to 6-8 weeks; use TUDCA 500 mg/day or UDCA; avoid alcohol; run bloodwork before and after cycle
Testosterone Suppression Moderate HPTA suppression - natural testosterone drops significantly during cycle Run with testosterone base at TRT dose; begin PCT 24-48 hours after last tablet
LDL/HDL Disruption Oral 17-aa steroids negatively affect cholesterol profile; HDL suppression and LDL elevation are common Cardiovascular exercise; fish oil supplementation; avoid prolonged cycles; lipid panel at cycle completion
Hair Loss Low androgenic activity makes this less common than with Dianabol or testosterone, but genetic predisposition still matters Risk is lower than most oral anabolics; androgenic DHT-pathway hair loss is minimal due to low androgenic score
Acne Androgen receptor stimulation increases sebaceous gland activity; less pronounced than higher-androgenic compounds Topical benzoyl peroxide or salicylic acid; keep dose within 20-40 mg range
Virilization (women) Low androgenic score makes Turanabol one of the better-tolerated orals for women at low doses Keep dose at 5-10 mg/day; stop immediately at first sign of voice changes or clitoral enlargement

Turinabol vs Dianabol vs Anavar

These three oral steroids are frequently compared because they occupy overlapping roles - all produce strength and lean mass gains without injectable administration - but their mechanisms and practical profiles differ in ways that make them suitable for different goals and user profiles.

Feature Turanabol (Tbol) Dianabol (Dbol) Anavar (Var)
Anabolic:Androgenic ~53:6 ~90-210:40-60 ~322-630:24
Aromatization None Yes - significant None
Water Retention Minimal High None
Hepatotoxicity Moderate (17-aa) Moderate-high (17-aa) Mild (17-aa)
Strength Gains Moderate, keepable Rapid, partly water Moderate, keepable
Mass Gains Lean, dry Large, wet Lean, minimal
Androgenic Risk Low Moderate Very low
Detection Time 6-12+ weeks 5-6 weeks 3-4 weeks
Typical Dose (men) 20-40 mg/day 20-50 mg/day 40-80 mg/day

The core distinction is that Turanabol sits between Dianabol and Anavar. It produces more anabolic output than Anavar for most users while avoiding Dianabol's estrogenic water retention. It does not produce the dramatic scale weight increases that Dianabol users see in weeks 1-2, but what it produces is lean and substantially retained post-cycle once water is not a variable. Users choosing between Tbol and Anavar often find Tbol provides slightly more raw mass gain while Anavar has a cleaner strength-to-side-effect profile and a shorter detection window.

PCT and Recovery

Turanabol's half-life of approximately 16 hours means the compound clears the system quickly - PCT can begin 24-48 hours after the last tablet, which is one of the advantages of short-ester or short-half-life compounds. However, the PCT start date is determined by the slowest-clearing compound in the cycle. If Testosterone Enanthate was used as a base, PCT must wait 14 days after the last testosterone injection despite the Turanabol having cleared in under two days. Running Testosterone Propionate as the testosterone base on a Turanabol cycle allows PCT to start 3-4 days after the last injection of either compound.

PCT Phase Duration Protocol
Wait period (Tbol only) 24-48 hours after last tablet Allow compound to clear before beginning SERM
Weeks 1-2 14 days Nolvadex 40 mg/day or Clomid 50 mg/day
Weeks 3-4 14 days Nolvadex 20 mg/day or Clomid 25 mg/day
Bloodwork check 4 weeks after PCT Confirm testosterone, LH, FSH at baseline

Turanabol's exceptionally long detection time - metabolites have been identified in samples collected months after the last dose - means it is not a suitable compound for athletes subject to drug testing. The compound's original advantage in the East German program was undetectability by 1970s testing methods; modern WADA-accredited labs have closed that window. Do not assume a 6-8 week clearance is sufficient for competitive drug testing.

Frequently Asked Questions

  • How does Turinabol differ from Dianabol if they share the same base structure?

    Turinabol and Dianabol are both derived from testosterone and share the same core modifications - a methyl group at C17 for oral bioavailability and a double bond at C1-C2. Turinabol adds one further change: a chlorine atom at the C4 position. That single addition changes the compound's entire pharmacological profile. The chlorine group prevents the aromatase enzyme from binding to the molecule, which means Turinabol does not convert to estrogen at all. The result is zero water retention and zero estrogen-driven gynecomastia risk from the Turinabol itself - a fundamental difference from Dianabol, which aromatizes significantly and produces rapid water accumulation alongside its anabolic effects. The chloro group also reduces the androgenic activity relative to anabolic activity, shifting the ratio from Dianabol's approximately 90-210:40-60 to Turinabol's approximately 53:6. In practice, this means Turinabol produces slower, leaner, more keepable gains with far less androgenic and estrogenic side effects compared to Dianabol, at the cost of less dramatic initial scale weight increases.

  • Does Turinabol require PCT?

    Yes, PCT is required after a Turinabol cycle. The compound suppresses the hypothalamic-pituitary-testicular axis and reduces natural testosterone production during the cycle. How significant the suppression is depends on dose and cycle length: at 20 mg/day for 6 weeks suppression is moderate, while at 40-50 mg/day for 8 weeks suppression is more complete. In either case, natural testosterone does not immediately recover when the compound is stopped - LH and FSH signaling must restart before the testes resume testosterone production, which takes weeks without intervention. Standard PCT is Nolvadex 40/40/20/20 mg (decreasing dose over 4 weeks) or Clomid at equivalent doses. The good news for Turinabol users is that PCT can begin 24-48 hours after the last tablet due to the compound's short half-life of approximately 16 hours, rather than the 14-day wait required after long-ester injectables.

  • Why does Turinabol have such a long detection time?

    Turinabol's detection window is one of its most unusual characteristics - and a significant practical concern for drug-tested athletes. The compound itself clears within days, but it produces metabolites that persist in urine for considerably longer. Early estimates placed detection at 5-6 weeks, but more sensitive modern testing methods have extended this dramatically. Research published after WADA improved metabolite detection protocols demonstrated that specific Turinabol metabolites can be identified in urine samples collected six months or more after the last dose. In at least one documented case, a metabolite was detected approximately 11 months post-use. The mechanism relates to how certain metabolites bind to glucuronide and remain detectable in trace amounts far beyond the window of pharmacological effect. The irony is notable: Turinabol was originally developed and used extensively by East Germany precisely because it could not be detected by the testing methods of the 1970s and 1980s. The compound that was chosen for undetectability has become one of the longest-detected steroids in modern anti-doping testing.

  • Is Turinabol hepatotoxic?

    Yes. Turinabol is a 17-alpha alkylated oral steroid, and like all 17-aa compounds it places an elevated metabolic burden on the liver. The alkylation at C17 is what makes the compound survive first-pass metabolism in the liver - without it, the drug would be broken down before reaching the bloodstream. The trade-off is that the altered metabolism increases liver enzyme levels (ALT and AST) during the cycle. Turinabol's hepatotoxicity is considered moderate relative to more aggressive 17-aa orals like Anadrol, but it is real and should not be dismissed. Standard harm reduction includes limiting cycles to 6-8 weeks maximum, using liver support supplements such as TUDCA at 500 mg/day throughout the cycle, avoiding alcohol entirely during the cycle, and running blood work (including liver panel) before, during, and after. Stacking multiple oral steroids simultaneously multiplies hepatic stress and is not advisable. A minimum of 8-12 weeks off oral steroids between cycles allows liver enzymes to normalize.

  • Turinabol vs Anavar - which should I choose?

    Both compounds produce lean, dry muscle gains without aromatization, which is why they are frequently compared. The practical differences come down to potency, cost, and detection. Anavar (oxandrolone) has a higher anabolic-to-androgenic ratio than Turinabol and a very mild hepatotoxicity profile for a 17-aa oral. However, pharmaceutical-grade Anavar is expensive and underdosing in underground lab preparations is common. Turinabol is less likely to be mislabeled and generally more affordable per cycle dose. In terms of results, most users find Turinabol produces slightly more raw anabolic output per milligram than Anavar - more lean mass gain at equivalent doses, though Anavar users often report superior strength-to-weight gains and harder, more vascular appearance. Detection time is a decisive factor for tested athletes: Anavar detects at 3-4 weeks while Turinabol's metabolites can remain detectable for months. For untested users choosing between the two on anabolic output alone, Turinabol at 30-40 mg/day competes well with Anavar at 50-60 mg/day and typically costs less.

  • What was the East German doping program that used Turinabol?

    State Plan 14.25 was the East German government's systematic doping program, administered by the sports ministry and Stasi, running from the late 1960s through the late 1980s. The program administered performance-enhancing substances - primarily Turinabol, which was called Oral Turinabol or STS 646 internally - to athletes across dozens of Olympic sports disciplines, often without the athletes' knowledge or meaningful consent. They were told the pills were vitamins. At its peak the program involved thousands of athletes, including juniors and women. The results on the Olympic medal table were dramatic: the DDR, a country of 17 million people, consistently ranked near the top of the Olympic medal count in the 1970s and 1980s. Turinabol was selected specifically because it was undetectable by the IOC drug tests of the era, and the East German scientists adjusted doses carefully to ensure clearance before competition. The program came to light after German reunification through documents recovered from Stasi archives. Multiple lawsuits followed, and former athletes reported lasting health consequences including hormonal dysfunction, liver damage, and cardiovascular disease from the decades of administered compounds.

  • Can women use Turinabol?

    Turinabol is among the more manageable oral anabolic steroids for women due to its very low androgenic activity (androgenic score of approximately 6 versus testosterone's 100). At doses of 5-10 mg/day, many women tolerate it without significant virilization side effects. The absence of aromatization also eliminates estrogen-related concerns such as bloating or gynecomastia. Women who use Turinabol typically report lean muscle gains, improved strength, and enhanced recovery within 4-6 week cycles. However, "more manageable" is not the same as "risk-free." Virilization effects - voice deepening, clitoral enlargement, increased facial or body hair, and changes to menstrual cycle - are still possible, particularly at higher doses or with extended use. Any sign of virilization is a signal to stop immediately; early-stage effects are reversible, while effects from prolonged high-dose use may not be. Women considering Turinabol should start at the lowest effective dose (5 mg/day) and keep cycles short at 4-6 weeks.

  • What results should I realistically expect from a Turinabol cycle?

    A realistic Turanabol cycle at 20-40 mg/day for 6-8 weeks alongside a testosterone base produces moderate but high-quality anabolic output. Users typically report: increased strength within the first 2-3 weeks, lean muscle mass gains of 5-10 lbs over the full cycle with minimal water retention, improved muscle hardness and definition, and enhanced recovery between training sessions. The gains from Turinabol are slower to materialize than Dianabol but are substantially more keepable post-cycle because they are not accompanied by water retention. What you gain is what you keep once the cycle ends and water is not a variable. The compound does not produce the dramatic scale weight jumps of a wet bulk cycle, which can disappoint users expecting Dianabol-like numbers. The strength improvements tend to persist longer post-cycle than those from high-aromatizing compounds. At 20 mg/day, the results are mild enough that some users question whether the hepatotoxicity is worth it at that dose - most users find 30-40 mg/day provides the balance of effective anabolic output against manageable liver stress.