What cypionate is
Cypionate is the long ester that dominates where enanthate dominates elsewhere, largely for historical and regulatory reasons rather than pharmacological ones. The cyclopentylpropionate chain gives a marginally longer half-life than enanthate and a marginally lower testosterone fraction.
- Ester chain
- 8-carbon (cyclopentylpropionic acid)
- Half-life
- Approximately 5 days.
- Testosterone fraction
- 69% by weight
- Per 100 mg of ester
- 69 mg of testosterone
- Presentation
- Oil solution for intramuscular injection, commonly 250 mg/ml.
- Storage
- Room temperature, protected from light.
Weight, and why it is not a detail
Comparisons between cypionate and enanthate are the most searched ester question and the answer is consistently unexciting: the difference is roughly half a day of half-life and about one percent of testosterone by weight. Where the two are both stocked, availability, concentration and price are the meaningful variables.
Where you meet it
Cypionate dominates in some markets for reasons that are regulatory and historical rather than pharmacological. It is the second of the three esters in Test 400, measured by independent HPLC at 128.76 mg/ml and 132.03 mg/ml, marginally the larger fraction of the two long-standard esters in that blend.
- Test 400 three at 400 mg/ml
Nearest esters
The closest reference points on the release curve.
- Quanta Pharma Testosterone Cypionatein stock£32
Availability checked 2026-09-01. The product page carries live stock.
Common questions
Is cypionate stronger than enanthate?
No. Cypionate carries slightly less testosterone per milligram, about 69% against 70%, and has a slightly longer half-life. At equal concentrations the two are interchangeable for practical purposes.
How much cypionate is in Test 400?
Two independent HPLC reports measured 128.76 mg/ml and 132.03 mg/ml, making it the second largest fraction of the three-ester blend after decanoate.
How much testosterone is in Testosterone Cypionate?
About 69% by weight. 100 mg of testosterone cypionate contains roughly 69 mg of testosterone, the remainder being the ester chain.
Does this page give dosing information for Testosterone Cypionate?
No. This is a reference resource covering the ester, its release profile, its weight and its storage. It does not provide dosing protocols, administration schedules or medical advice.