What Sustanon 250 is
Sustanon 250 is the original four-ester testosterone blend, combining propionate, phenylpropionate, isocaproate and decanoate to total 250 mg of testosterone ester per millilitre. The design intent was clinical: a single injection that begins acting within a day from the short esters while the decanoate fraction continues releasing a fortnight later.
- Concentration
- 250 mg/ml
- Number of esters
- Four
- Esters present
- Propionate, phenylpropionate, isocaproate and decanoate
- Presentation
- Multi-dose vial
- Storage
- Room temperature, protected from light
The four esters
The classic Sustanon 250 formulation splits its 250 mg per millilitre across four esters as follows.
| Ester | Per ml | Half-life |
|---|---|---|
| Testosterone Propionate | 30 mg | ~0.8 days |
| Testosterone Phenylpropionate | 60 mg | ~1.5 days |
| Testosterone Isocaproate | 60 mg | ~2 days |
| Testosterone Decanoate | 100 mg | ~7.5 days |
Concentration and solvent
All four esters carry the same hormone. Only the release curves differ, which is what produces the characteristic shape: a fast rise from the propionate and phenylpropionate fractions, a middle sustained by isocaproate, and a long tail governed almost entirely by the decanoate.
- Quanta Pharma Sustanon 250out of stock£29
Availability checked 2026-09-01. The product page carries live stock.
The other blends
Common questions
What are the four esters in Sustanon 250?
Propionate, phenylpropionate, isocaproate and decanoate. The classic formulation splits 250 mg as 30 mg propionate, 60 mg phenylpropionate, 60 mg isocaproate and 100 mg decanoate per millilitre.
Is Sustanon 250 stronger than testosterone enanthate?
No. Both supply 250 mg of testosterone ester per millilitre where concentrations match. The difference is the shape of release, not the amount. Enanthate gives one curve; Sustanon gives four overlapping ones.
Which ester decides how long Sustanon stays active?
The decanoate fraction. At roughly 7.5 days it has by far the longest half-life of the four and is the component still releasing once the others have cleared.
Does this page give dosing information for Sustanon 250?
No. This is a reference resource covering composition, esters and storage. It does not provide dosing protocols, administration schedules or medical advice.