After a Dianabol cycle, your body’s natural testosterone production is suppressed, your liver has taken a hit from processing an oral steroid, and cortisol is ready to surge and eat into the muscle you just built. Post-cycle therapy (PCT) is the process of restoring hormonal balance, protecting your organs, and holding onto your gains. Here’s what that looks like in practice.
Why PCT Matters After Dianabol
Dianabol is a 17-alpha-alkylated oral steroid, meaning it passes through your liver and stresses it in the process. It also signals your brain to stop producing its own testosterone, since external androgens are flooding your system. Once you stop taking it, you’re left in a hormonal gap: synthetic testosterone is gone, but your body hasn’t restarted its own production yet. Without intervention, this gap can last months and comes with low energy, mood changes, fat gain, and significant muscle loss.
PCT bridges that gap. The goal is threefold: restart your natural testosterone, protect your liver as it recovers, and blunt the cortisol spike that causes post-cycle muscle breakdown.
Restarting Testosterone With SERMs
The backbone of any Dianabol PCT is a class of drugs called selective estrogen receptor modulators (SERMs). These work by blocking estrogen’s signal at the brain, which tricks your pituitary gland into releasing the hormones (LH and FSH) that tell your testes to produce testosterone again.
The two most commonly used SERMs are clomiphene (Clomid) and tamoxifen (Nolvadex). A standard protocol runs both together for four weeks, starting roughly two weeks after your last Dianabol dose to allow the steroid to clear your system:
- Clomid: 50 mg per day for 4 weeks
- Nolvadex: 20 mg per day for 4 weeks
Running both together gives you overlapping mechanisms. Clomid is stronger at stimulating LH release, while Nolvadex is more effective at blocking estrogen in breast tissue, reducing the risk of gynecomastia from residual estrogen conversion. Some users taper Clomid down to 25 mg in weeks 3 and 4, though the flat-dose protocol is well-documented.
HCG for Testicular Recovery
If your cycle caused noticeable testicular shrinkage, human chorionic gonadotropin (HCG) can speed recovery. HCG mimics LH directly, stimulating your testes to produce testosterone before your brain’s signaling fully restarts. A 2025 study comparing PCT approaches in recreational bodybuilders found that combining clomiphene with HCG at 1,500 IU three times per week produced significantly better outcomes than clomiphene alone. Testicular volume increased by 20% or more in about 71% of the combination group, compared to just 7% of those who skipped PCT entirely. At 12 months, normal sperm production was restored in 87.5% of the combination group versus 58.6% of the no-treatment group.
HCG is typically run during the first two to three weeks of PCT, then discontinued before finishing SERMs. Running it too long can desensitize the testes to LH, which defeats the purpose.
Liver Recovery Support
Dianabol is hard on the liver. Your AST and ALT enzymes (markers of liver stress) are almost certainly elevated after a cycle. Two supplements have solid evidence behind them for liver recovery.
TUDCA (tauroursodeoxycholic acid) is a bile acid that protects liver cells from toxicity and reduces inflammation. It works by suppressing inflammatory signaling pathways that get activated during drug-induced liver injury. Research on drug-induced liver damage in animal models found that combining TUDCA with NAC (N-acetylcysteine) was more effective at treating liver injury than either compound alone. NAC is a precursor to glutathione, your liver’s primary antioxidant, and directly supports its detoxification capacity.
Common dosing in the bodybuilding community is 500 mg of TUDCA and 600 to 1,200 mg of NAC daily, continued for four to six weeks post-cycle or until bloodwork shows liver enzymes have normalized. Starting these during your cycle and continuing through PCT gives your liver the longest window of protection.
Controlling the Cortisol Spike
One of the least discussed but most damaging parts of coming off Dianabol is the cortisol rebound. While on cycle, elevated androgens keep cortisol suppressed. Once those androgens drop and your natural testosterone hasn’t recovered yet, cortisol surges. This is catabolic, meaning it breaks down muscle tissue for energy, precisely the opposite of what you want.
Phosphatidylserine (PS) is the most studied supplement for blunting cortisol. Research published in the Journal of the International Society of Sports Nutrition found that 600 mg per day for 10 days blunted cortisol response to physical stress. Higher doses show even stronger effects: 800 mg per day reduced cortisol response to intense resistance training by 20% and to cycling exercise by 30%. Below 400 mg, the effects on cortisol aren’t significant, so dose matters here. Aim for 600 to 800 mg daily during your PCT window.
Vitamin C at 1,000 to 2,000 mg daily also has mild cortisol-lowering properties and supports immune function, which can take a hit during hormonal transitions.
Micronutrient Support for Testosterone
While SERMs do the heavy lifting, certain micronutrients support the enzymatic processes your body uses to synthesize testosterone. These won’t replace PCT drugs, but deficiencies in any of them can slow your recovery.
Vitamin D is the most important. Daily requirements for full-body tissue support are estimated between 3,000 and 5,000 IU per day. A study in rowers found that 3,000 IU daily for eight weeks improved blood levels of vitamin D, though this dose alone wasn’t enough to significantly shift testosterone and cortisol ratios. If you’re deficient (and many people are), correcting that deficiency removes a bottleneck in testosterone production.
Zinc and magnesium round out the basics. Zinc is directly involved in testosterone synthesis and tends to be depleted by heavy training. Magnesium supports sleep quality, which is when most of your testosterone is produced. A combined supplement providing 30 mg of zinc and 400 to 450 mg of magnesium covers both bases without overdoing it.
Bloodwork: When and What to Test
You can’t manage what you don’t measure. Get bloodwork done at two points: once before starting PCT (to see how suppressed you are) and once four to six weeks after finishing PCT (to confirm recovery). A clinical practice guideline published in the British Journal of General Practice recommends the following panel for anyone coming off anabolic steroids:
- Total and free testosterone: confirms whether your natural production has restarted
- Estradiol: checks for elevated estrogen, which can persist after cycle and cause water retention or gynecomastia
- Lipid panel: Dianabol tanks HDL (good cholesterol) and raises LDL (bad cholesterol), increasing cardiovascular risk. You need to know where you stand
- Liver enzymes (AST and ALT): confirms your liver is recovering
- LH and FSH: the actual hormones that drive testicular function. If these are still low after PCT, your recovery isn’t complete
If your testosterone and LH/FSH are still suppressed four weeks after finishing SERMs, a second round of PCT or medical evaluation may be needed.
Putting It All Together
A practical PCT timeline after a standard 6-to-8-week Dianabol cycle looks like this. Wait roughly two weeks after your last Dianabol dose for the drug to clear. Then run four weeks of Clomid at 50 mg daily and Nolvadex at 20 mg daily. If using HCG, add 1,500 IU three times per week for the first two to three weeks only. Throughout the entire period, take TUDCA (500 mg daily), NAC (600 to 1,200 mg daily), phosphatidylserine (600 to 800 mg daily), vitamin D (3,000 to 5,000 IU daily), zinc, and magnesium.
Keep training during PCT but adjust expectations. You won’t be hitting PRs. Train to maintain, keep protein at 1 gram per pound of bodyweight or higher, prioritize sleep, and let your body do the work of restoring itself. The gains you keep through a well-run PCT are the ones that actually count.