Nandrolone Phenylpropionate(Durabolin)Steroids Powder For Bodybuilding CAS:62-90-8

   Introduction: What is Nandrolone Phenylpropionate?

   Nandrolone Phenylpropionate (NPP), commercially branded as Durabolin, is an anabolic-androgenic steroid (AAS) derived from testosterone. Unlike its decanoate counterpart (Nandrolone Decanoate), NPP features a phenylpropionate ester attached to the nandrolone base. This esterification shortens its half-life, enabling faster release and clearance. Developed in the 1950s, NPP was initially used medically to treat osteoporosis and anemia due to its potent anabolic effects. In bodybuilding, it's prized for lean muscle accretion with reduced androgenic risks compared to testosterone.

    1.Chemical Profile:

    ○Molecular Formula: C₂₇H₃₄O₃

    ○Ester Weight: Phenylpropionate reduces molecular weight to ~20% of the compound, accelerating absorption.

    ○Anabolic Ratio: 125:37 (anabolic:androgenic), emphasizing tissue-building over masculinizing effects.

    2.Ester Dynamics:
    The phenylpropionate ester hydrolyzes quickly, yielding a half-life of 2–3 days. This contrasts sharply with Nandrolone Decanoate's 6–7 days, requiring more frequent injections but reducing metabolite accumulation.

    3.Water Retention:
    NPP exhibits lower estrogenic activity than testosterone due to minimal aromatization (estimated at 20% of testosterone's rate), mitigating bloating and gynecomastia risks.

    1.Bulking Phases:
    NPP stimulates nitrogen retention and protein synthesis, enabling lean mass gains of 5–10 lbs over 8 weeks without excessive fluid retention.

    2.Cutting Cycles:
Its anti-catabolic properties preserve muscle during caloric deficits. Combined with low estrogenicity, it maintains vascularity and definition.

    3.Joint/Tendon Repair:
    NPP enhances collagen synthesis and synovial fluid production, alleviating joint pain-a common issue in heavy lifting.

    1.Quality Muscle Growth:
    Promotes dense, sustainable muscle via IGF-1 upregulation and glycogen storage in tissues.

    2.Enhanced Recovery:
    Reduces cortisol impact, shortening rest periods between sessions by 24–48 hours.

    3.Androgenic Side Effect Mitigation:
    Minimal conversion to DHT (dihydrotestosterone), lowering risks of acne, hair loss, and prostate issues.

    4.Neuroprotective Effects:
    Studies suggest nandrolone may support neural health, improving mind-muscle connection.

    Beginners: 50–100 mg every other day (EOD) for 8 weeks.

    Intermediate: 100–150 mg EOD, often stacked with testosterone (e.g., 300 mg/week).

    Advanced: 150–200 mg EOD, paired with compounds like Trenbolone or Masteron.
    *Note: Exceeding 400 mg/week amplifies progesterone-related sides (e.g., libido drop, lethargy).*

    1.Solo Cycle (Rare):

    ○Weeks 1–8: NPP 100 mg EOD.

    ○*PCT starts 3 days post-last pin*.

    2.Testosterone Stack (Most Common):

    ○Weeks 1–10: Testosterone Enanthate (300 mg/week) + NPP (400 mg/week).

    ○Aromatase inhibitor (e.g., Anastrozole 0.5 mg E3D) as needed.

    3.Cutting Cycle:

    ○Weeks 1–8: NPP (300 mg/week) + Primobolan (400 mg/week) + T3 (25 mcg/day).

    ●Half-Life: 2–3 days.

    ●Administration: Intramuscular injections (glutes, deltoids) EOD to maintain stable blood levels. Skipped doses cause hormonal fluctuations, heightening side effect risks.

    Why PCT?
    NPP suppresses natural testosterone production (HPTA axis). Without PCT, users face muscle loss, depression, and erectile dysfunction.

    PCT Protocol (4 Weeks):

    ●Clomid: 50 mg/day (Weeks 1–2), 25 mg/day (Weeks 3–4).

    ●Nolvadex: 40 mg/day (Week 1), 20 mg/day (Weeks 2–4).

    ●Support Supplements: D-aspartic acid (2 g/day), vitamin E (400 IU/day).

    Initiate PCT 3–4 days after last NPP dose.

    1.Progesterone Issues:

    ○NPP activates progesterone receptors, potentially causing:

    ◇Gyno: Cabergoline (0.25 mg 2x/week) if prolactin rises.

    ◇Libido Loss: Avoid stacking with Trenbolone; add Proviron (25 mg/day).

    2.Cardiovascular Risks:

    ○NPP lowers HDL ("good" cholesterol) by 20–30%. Counter with omega-3s (4 g/day) and cardio.

    3.Androgenic Effects:

    ○Mild acne or oily skin-manage with topical retinoids.

    ●Legal Status: Schedule III drug (U.S.), prohibited by WADA.

    ●Quality Control: Powder must be pharmaceutical-grade (99% purity) to avoid heavy metal contamination.

    ●Health Monitoring:

    ○Blood tests pre/during/post-cycle (focus on lipids, liver enzymes, prolactin).

    ○Blood pressure checks twice weekly.

Trade names	Durabolin,NPP,Nandrolone phenpropionate,19-Nortestosterone phenylpropionate, Nandrolone hydrocinnamate,19-Nortestosterone 17β-phenylpropionate,NSC-23162
CAS	62-90-8
Molar mass	406.566
Formula	C27H34O3
Purity	Above 98%
Apprarance	White Or Light Yellow Crystalline Powder

 

 

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    Nandrolone Phenylpropionate offers a versatile tool for bodybuilders prioritizing lean mass and joint health. Its rapid clearance reduces long-term toxicity but demands disciplined injection timing. When dosed conservatively (≤400 mg/week) and paired with vigilant PCT, NPP delivers exceptional anabolic returns with manageable risks. Nonetheless, users must acknowledge legal boundaries and prioritize health diagnostics to harness its benefits sustainably.

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