For bodybuilding, nandrolone decanoate (Deca-Durabolin) is typically used at 200–600 mg per week. Beginners often start at 200–300 mg weekly, while advanced users may go up to 600 mg. Cycles usually last 8–12 weeks. It’s often stacked with testosterone to maintain hormonal balance. Post-cycle therapy (PCT) is essential to restore natural testosterone production. Always consult a medical professional before using anabolic steroids due to potential health risks.