Sustanon Duncan
Sustanon by Duncan Pharma is a powerful testosterone blend built from four different esters — a mix of short and long chains that gives both a fast onset and a sustained, stable release. This makes it a versatile testosterone base for almost any goal, delivering strong gains in muscle mass, strength and recovery while keeping blood levels smooth across the week. It is one of the most popular ways to run a testosterone foundation for a bulking or lean-mass cycle.
| Active substance | Testosterone blend (4 esters) |
| Manufacturer | Duncan Pharma |
| Form | Injectable oil solution |
| Typical dosage | 250–750 mg per week |
| Half-life | Mixed (short + long esters) |
| Classification | Injectable testosterone base |
Effects and benefits
Sustanon boosts protein synthesis, nitrogen retention and red blood cell production for solid mass and strength gains and faster recovery. As a full testosterone, it also supports libido, mood and overall wellbeing, and its blended esters mean quick early results plus stable long-term levels from a single compound.
- Strong muscle mass and strength gains
- Fast onset plus sustained release
- Improved recovery and red blood cells
- Reliable testosterone base for any goal
Dosage and administration
Most users run 250–750 mg per week, injecting twice weekly to keep the short esters stable, with estrogen control in place. Compare it with the rest of the injectable steroids range when planning your cycle.
Stacking and combinations
As a base, Sustanon supports almost any addition — a classic bulk stacks it with Nandrolone Decanoate and a Methandienone kickstart in the opening weeks.
Why choose Duncan Pharma
Duncan Pharma products are made to consistent pharmaceutical standards with dependable dosing. Explore the full Duncan range to build a matching stack.
| Characteristics | |
| Shelf Life | 36 months from manufacture date |
| Drug Class | Anabolic/Androgenic Steroid |
| Concentration | 250 mg/ml |
| Half-Life | Approximately 15-18 days |
| Detection Time | Up to 3 months |
| Anabolic Index | 100 |
| Androgenic Index | 100 |
| Estrogen Level | High |
| Active Substance | Testosterone Propionate + Phenylpropionate + Isocaproate + Decanoate |
| Aromatization | High |
| Dosage | 250-1000 mg per week |
| Drug Category | Anabolic Steroids |
| Form | Injectable solution |
| Oil-based | Yes |
| Product Packaging | 10 ml vial |
| Water Retention | High |
| Progestational Activity | None |
| Liver Toxicity | Low |
| Chemical Structure | Testosterone (four-ester blend) |