Omnadren (the Polish counterpart) and Sustanon 250 (Organon) are popular Testosterone mixes composed of various esters (short- and long-acting). Their goal is to provide an immediate effect and a constant, long duration of action.

Composition and Action:

• Ester Composition: A combination of short-acting (Propionate) and long-acting esters (e.g., Decanoate). Short esters provide an immediate effect, while long esters guarantee efficacy for 3–4 weeks (in medicine).
• The Peak Problem: Unlike single esters (Enanthate, Cypionate), these mixes cause **uneven active substance levels**. Short esters (Propionate and Phenylpropionate) create a rapid, high concentration peak (Supraphysiological Peak), which intensifies potential side effects.

Outdated views about Testosterone mixes still persist among bodybuilders:

Myth: "Sustanon 250" causes less water retention than Testosterone Enanthate or Cypionate.
Fact: **This is false.** The aromatization and fluid retention properties are comparable, especially when doses are equalized.

Myth: Polish "Omnadren" causes more water accumulation than "Sustanon 250" / "Omnadren" is contaminated.
Fact: **This is false.** The new version of Omnadren from Jelfa has the same composition as Sustanon, and production adheres to strict EU regulations.

Despite the issue of uneven concentration, **Sustanon 250** and **Omnadren 250** can be used by athletes who are primarily focused on **rapid mass gain**, even at the expense of water retention.

Recommendations for Bulking Cycles:

• Goal: Primarily the mass gain phase. Use during dieting or contest preparation **is pointless** due to the difficulty in controlling water retention.
• Beginners (First Cycle): 250 mg every 10 days. The dose can be increased to 500 mg every 10 days. The cycle should last **12–16 weeks**.
• Advanced Users: 500 mg every 5–7 days. Cycle length: **minimum 12–16 weeks**, optimally up to one year.
• Professionals: 1000 mg weekly, up to 2000 mg weekly in the mass gain phase.

⚠️ **Warning:** Short cycles (6–8 weeks) on Testosterone mixes primarily result in mass consisting of water and fat, not solid muscle tissue. It is better to use **moderate doses** and **extend the duration of use**.

Possible side effects are typical for Testosterone but may be exacerbated by high concentration "Peaks":

Main Side Effects:

• Estrogenic: Gynecomastia, strong water retention, increased risk of fat accumulation.
• Androgenic: Oily skin, acne (hard to reduce with Finasteride), hair loss on the head, body hair growth, prostate enlargement.
• Other: Strain on the cardiovascular system, increased aggression.

Managing Side Effects:

• DHT Reduction (Hair/Prostate): Finasteride (1 mg/day) only acts on Type II enzyme (prostate, scalp). For reducing acne and oily skin (Type I enzyme), **Dutasteride** (blocks both enzymes) is recommended.
• Estrogen Control: It is necessary to use aromatase inhibitors (AI), e.g., **Anastrozole** (0.25–0.5 mg daily) or zinc, especially since Finasteride increases estrogen levels.

Intensive PCT (Recovery):

Testosterone Mix strongly suppresses natural production, requiring intensive Post Cycle Therapy:

• Considering the use of **HCG** (gonadotropin) two weeks before the end of the cycle (in case of testicular atrophy).
• Shortly after the end of the cycle: **Clomid and/or Tamoxifen**.
• Additionally: anti-catabolic substances (Clenbuterol/Ephedrine, Vitamin C) and Creatine and Glutamine to ensure rapid regeneration of the hypothalamic-pituitary-testicular axis.