Deca 330mg (Nandrolone Decanoate) is a slow-acting, oil-based anabolic steroid derived from testosterone. It has a strong anabolic effect with low androgenic properties, making it one of the most popular and well-tolerated steroids for building lean muscle mass, improving joint health, and enhancing recovery.
It increases nitrogen retention, boosts red blood cell production, and promotes collagen synthesis, which contributes to its performance and healing benefits. Due to its decanoate ester, Deca 330mg releases slowly into the bloodstream, providing stable levels over a longer period and requiring fewer injections.
Used during bulking cycles or in off-season protocols, Deca 330mg supports muscle growth without excessive water retention. It’s often stacked with testosterone to prevent suppression-related side effects such as low libido or fatigue.
Benefits
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Promotes lean muscle mass and strength gains
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Enhances joint and connective tissue health
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Supports faster recovery and reduced post-training soreness
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Boosts endurance and red blood cell production
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Low androgenic activity with fewer side effects than many other compounds
Side effects
While Deca 330mg is generally well tolerated, possible side effects include:
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Suppression of natural testosterone production
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Progesterone-related gynecomastia (even in the absence of high estrogen)
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Bloating or mild water retention (less than testosterone)
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Acne or oily skin
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Decreased libido or erectile dysfunction if not stacked with testosterone
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Mood changes or increased appetite
Side effects can be mitigated by using a testosterone base and monitoring estrogen and prolactin levels during the cycle.
Dosages & Protocol
Dosages for Men:
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Beginner: 300–400mg per week (just under or just over 1ml)
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Intermediate: 500–600mg per week (1.5–2ml)
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Advanced: 600–800mg per week (up to 2.5ml)
Injections are typically administered once or twice weekly due to the long half-life
How to administer – reconstitution and how to inject
Deca 330mg is an oil-based injectable and does not require reconstitution
Injection:
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Use a 3ml syringe with a 23–25 gauge needle (1–1.5 inch)
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Inject intramuscularly into the glute, thigh, or deltoid
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Clean the injection site thoroughly with an alcohol swab
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Aspirate slightly to check for blood, inject slowly, and massage the area afterward
Storage
Store at room temperature, away from light and heat
Keep the vial sealed tightly when not in use
Half life & detectability
Half-Life: Approximately 6–12 days, with effects lasting up to 2 weeks
Detection Time: Can remain detectable in the system for up to 18 months, making it unsuitable for drug-tested athletes
For athletes subject to drug testing, it is important to consider these detection times and plan accordingly to avoid positive tests for banned substances.
