Sustanon 250 (Sustanon 250 (Testosterone Ester Blend))
A blend of four testosterone esters (propionate, phenylpropionate, isocaproate, decanoate) designed to give both fast onset and long duration from a single injection. Widely used for TRT in some countries and in anabolic cycles. Educational reference only.
How it works
Combines short, medium, and long esters so testosterone is released at staggered rates, producing a rapid initial rise followed by sustained levels. The active hormone is standard testosterone acting on androgen receptors.
Key facts
- Molecular weight: Blend (varies by ester)
- Half-life: Mixed (~1 day to ~2 weeks across esters)
- Bioavailability: Intramuscular injection
- Storage: Room temperature; protect from light.
Dosing overview
- Typical dose: Medical: ~250 mg every 2-3 weeks (varies)
- Frequency: Every 1-3 weeks (medical)
- Duration: Ongoing (medical) or cycled
- Route: Intramuscular injection
Protocol notes
- Medical labeling often suggests dosing every few weeks, though many clinicians dose more frequently for stable levels.
- The staggered esters give an early peak plus a long tail.
- Non-medical use carries the same risks as other testosterone forms.
Reported benefits
- Fast onset plus long duration
- Single-product convenience
- Restores testosterone (medical)
- Muscle mass and strength
Possible side effects
- Testosterone suppression
- Elevated hematocrit
- Estrogenic effects
- Less predictable blood levels
- Cardiovascular/lipid risk
Research
- Multi-ester testosterone blends (2016): Blended esters produced a combined fast-and-sustained release profile in pharmacokinetic studies.
Compare Sustanon 250
Research and educational reference only. Not medical advice.