Contents9 sections
Turinabol (4-chlorodehydromethyltestosterone), commonly called Tbol, is an oral anabolic steroid derived from a structural modification of Dianabol. The key modification — the addition of a chlorine atom at the 4-position — prevents aromatization to estrogen, making Turinabol a dry compound that produces lean gains without the water retention and bloating associated with Dianabol.
Developed in East Germany in the 1960s, Turinabol was originally used to treat bone-wasting conditions before being adopted as a performance enhancer for Olympic athletes. The East German state-sponsored doping program administered Tbol to thousands of athletes across multiple sports for over two decades. The compound was discontinued for medical use after the doping scandal became public in the 1990s and remains a controlled substance in most jurisdictions.
Key Takeaways
- Turinabol is an oral steroid that produces lean muscle gains without water retention or estrogenic side effects.
- Standard Tbol cycle dosage for men is 30-50 mg daily for 6-8 weeks; women use 5-10 mg daily for 5 weeks.
- It does not aromatize to estrogen, so gynecomastia and water bloating are not concerns during the cycle.
- Liver toxicity is the primary health risk as an oral 17-alpha-alkylated steroid.
- PCT is required after every Turinabol cycle to restore natural testosterone production.
What Is Turinabol?
Turinabol is a modified form of Dianabol (Methandrostenolone) with the addition of a 4-chloro group. This structural change has two effects: it eliminates aromatase activity (no conversion to estrogen) and reduces the compound’s androgenic potency while preserving its anabolic properties.
Quick Facts
| Property | Detail |
|---|---|
| Chemical name | 4-Chlorodehydromethyltestosterone |
| Other names | Tbol, Oral Turinabol, Chlorodehydromethyltestosterone |
| Classification | Oral anabolic steroid |
| Anabolic rating | 54 (vs testosterone = 100) |
| Androgenic rating | 6 (vs testosterone = 100) |
| Aromatization | None |
| Half-life | ~16 hours |
| Detection time | ~12 months |
| Liver toxicity | Yes (17-alpha-alkylated) |
The anabolic-to-androgenic ratio of Turinabol (54:6) shows that it is moderately anabolic with very low androgenic activity. This profile makes it suitable for users who want lean gains without the aggressive androgenic side effects (acne, hair loss, aggression) seen with stronger compounds.
Turinabol Cycle Benefits
Lean Muscle Without Water Retention
Because Turinabol does not aromatize, users do not experience the water retention that accompanies estrogenic steroids like Dianabol or Testosterone at high doses. Turinabol results show steady, dry gains that are more easily retained post-cycle. Realistic expectations for a first Tbol cycle are 8-15 lbs of lean mass over 6-8 weeks.
Suitable for Both Bulking and Cutting
Turinabol is versatile enough for both phases. During a caloric surplus, it enhances protein synthesis and nitrogen retention for muscle growth. During a deficit, it helps preserve lean tissue while the body draws on fat stores for energy. This dual-purpose utility makes the Turinabol cycle useful for body recomposition goals.
No Estrogenic Side Effects
The absence of aromatization means no risk of gynecomastia, water bloating, or estrogen-driven fat gain during the cycle. This is a significant advantage over wet compounds and one of the primary reasons bodybuilders choose a Tbol cycle for contest prep or cutting phases.
Oral Administration
Turinabol is taken in tablet form, eliminating the need for injections. While this is convenient, the 17-alpha-alkylation required for oral bioavailability is what makes the compound hepatotoxic, which is the trade-off for avoiding needles.
Turinabol Dosage and Cycle Protocols
Male Protocols
| Protocol | Dosage | Duration | Best For |
|---|---|---|---|
| Beginner (Tbol only) | 30-40 mg/day | 6 weeks | First-time oral steroid users |
| Intermediate (Tbol only) | 40-50 mg/day | 6-8 weeks | Experienced users seeking lean gains |
| Tbol + Testosterone stack | 40 mg/day Tbol + 300-500 mg/week Test | 6-8 weeks Tbol, 10 weeks Test | Maximizing gains with testosterone base |
Testosterone + Tbol Stack (Recommended)
Running a testosterone base alongside Turinabol is recommended because Tbol will suppress natural testosterone production. The testosterone maintains physiological hormone levels and provides an anabolic foundation.
| Week | Testosterone | Turinabol |
|---|---|---|
| 1 | 300 mg/week | 40 mg/day |
| 2-7 | 400-500 mg/week | 40 mg/day |
| 8-10 | 400-500 mg/week | — |
Female Protocol
| Week | Turinabol |
|---|---|
| 1-5 | 5-10 mg/day |
Women should keep Turinabol dosage at 5-10 mg daily for no more than 5 weeks to minimize virilization risk. The compound’s low androgenic rating makes it one of the more female-friendly oral steroids, but virilization symptoms (voice deepening, facial hair) can still occur at higher doses.
Turinabol Side Effects
Liver Toxicity
As a 17-alpha-alkylated oral steroid, Turinabol passes through the liver and causes hepatic stress. Liver enzyme values (AST, ALT) will elevate during a Tbol cycle. Cycle length should be limited to 6-8 weeks maximum, and liver support supplements (TUDCA, NAC) are recommended throughout.
Avoid alcohol consumption during a Turinabol cycle, and do not stack Tbol with other hepatotoxic oral steroids (Dianabol, Anadrol, Winstrol) as the combined liver stress can cause serious damage.
Testosterone Suppression
Turinabol suppresses the hypothalamic-pituitary-gonadal (HPG) axis, reducing natural testosterone production. The degree of suppression depends on dosage and cycle length. Post-cycle therapy is mandatory after every Tbol cycle to restore endogenous testosterone. Without PCT, users risk prolonged hypogonadal symptoms including fatigue, muscle loss, low libido, and depression.
Cardiovascular Effects
Turinabol negatively affects cholesterol by increasing LDL (bad cholesterol) and decreasing HDL (good cholesterol). This shift increases cardiovascular risk during the cycle. Regular cardiovascular exercise and a diet rich in omega-3 fatty acids can help mitigate this effect.
Virilization in Women
Despite its low androgenic rating, Turinabol can cause virilization in women at higher doses or longer cycle lengths. Symptoms include:
- Deepening of the voice (often irreversible)
- Increased facial and body hair growth
- Clitoral enlargement
- Changes in jaw structure
Women should discontinue use immediately if virilization symptoms appear.
Other Side Effects
| Side Effect | Likelihood | Notes |
|---|---|---|
| Oily skin | Common | More pronounced in users already prone |
| Mood changes | Occasional | Amplification of existing temperament traits |
| Hair thinning | Uncommon | Low androgenic activity makes this rare |
| Acne | Uncommon | Much less than with highly androgenic compounds |
PCT After Turinabol
Post-cycle therapy is required after every Turinabol cycle to restore natural testosterone production. The standard PCT protocol begins 2-3 days after the last Tbol dose (given its ~16-hour half-life).
Recommended PCT
| PCT Drug | Dosage | Duration |
|---|---|---|
| Nolvadex (Tamoxifen) | 40 mg/day weeks 1-2, 20 mg/day weeks 3-4 | 4 weeks |
| Clomid (optional addition) | 50 mg/day weeks 1-2, 25 mg/day weeks 3-4 | 4 weeks |
Nolvadex alone is generally sufficient for Tbol-only cycles. When stacking with testosterone, the PCT timing should be based on the testosterone ester’s clearance time (typically 2-3 weeks after the last testosterone injection for Enanthate/Cypionate).
Blood work should be obtained before the cycle, at the end of PCT, and 4-6 weeks post-PCT to confirm testosterone levels have recovered. The Turinabol side effects on natural testosterone production are dose-dependent, and recovery time varies by individual.
The Bottom Line
A Turinabol cycle offers a middle-ground approach to anabolic steroid use, moderate lean gains without water retention, estrogenic side effects, or extreme androgenic activity.
- The trade-offs are liver toxicity from oral administration, testosterone suppression requiring PCT, and negative effects on cholesterol.
- The Tbol cycle is best suited for users seeking dry, retainable gains rather than dramatic mass. Its low androgenic profile makes it one of the better-tolerated oral steroids, particularly for women at conservative doses.
- For men, stacking with a testosterone base maximizes results while maintaining hormonal balance
Frequently Asked Questions
Disclaimer
Please read carefully
The information on this site is for educational and informational purposes only, and is not medical advice. Always consult a qualified healthcare professional before using any supplement or medication, or making changes to your health, fitness, or nutrition routine.
Not medical advice
Content here is not a substitute for professional medical advice.
Consult your doctor
Talk to your doctor before starting any supplement or new routine.
Use at your own risk
We are not responsible for adverse effects from acting on this.
Do your research
Make informed decisions about your own health.
No guarantees
Individual results vary. No claims about outcomes.
Important — Never disregard professional medical advice or delay seeking it because of something you read here. If you think you may have a medical emergency, call your doctor or your local emergency number right away.
