Overview
Injectable testosterone with a long “ester” so it releases over ~8 days.
The foundation of TRT and most steroid cycles.
This is an anabolic-androgenic steroid, an oil, not a peptide; with a different and more serious risk profile (it shuts down your own testosterone, thickens blood, and worsens cholesterol).
What It Does
Testosterone cypionate is esterified testosterone in oil for IM/SubQ injection (~8-day half-life).
It restores or raises androgen levels, building muscle, strength, libido, and well-being; while suppressing the body’s own production (HPTA) and aromatizing to estrogen.
TRT replaces a deficiency; supraphysiologic “cycle” doses add risk proportional to dose.
Presentation
| Vial | Form | Concentration | Note |
|---|---|---|---|
| 10 mL | Oil solution (no reconstitution) | 250 mg/mL | 0.1 mL = 25 mg. Draw with a larger-gauge needle, inject with a smaller one. |
Protocol
| Phase | Frequency | Amount | Notes |
|---|---|---|---|
| TRT | 2×/week (split) | 100–150 mg/week | Replacement dosing. Split doses smooth levels and estrogen. |
| Cycle (enhancement) | 2×/week | 300–600 mg/week | Supraphysiologic, risk rises with dose. 12–16 weeks typical, then PCT. |
TRT is continuous (lifelong, with monitoring); enhancement cycles run 12–16 weeks then either PCT (restart) or cruise. Estrogen: aromatizes, an aromatase inhibitor may be needed at higher doses (don’t crush estrogen to zero). Note: controlled substance; HPTA suppression means you need a plan to recover or stay on.
Testosterone is the primary male androgen; women need only trace amounts. Male-range doses cause virilization, voice deepening, facial/body hair, clitoral enlargement, male-pattern balding; much of it permanent. Not appropriate at the doses on this page. Men: Standard TRT/cycle compound. Suppresses natural production & sperm; aromatizes to estrogen. Monitor hematocrit, estradiol, PSA, lipids; add hCG to preserve fertil Testosterone is the primary male androgen; women need only trace amounts. Male-range doses cause virilization, voice deepening, facial/body hair, clitoral enlargement, male-pattern balding; much of it permanent. Not appropriate at the doses on this page. Men: Standard TRT/cycle compound. Suppresses natural production & sperm; aromatizes to estrogen. Monitor hematocrit, estradiol, PSA, lipids; add hCG to preserve fertility.
Handling & Stacking
- Improved libido, energy, muscle, and recovery.
- Suppression of natural production.
- Effects and side effects scale with dose.
- Supply math 10mL → ~16 weeks at TRT (150 mg/wk) | ~5 weeks at 500 mg/wk cycle
Safety & Patient Education
- Baseline + periodic: total/free testosterone, estradiol, CBC (hematocrit), lipid panel, PSA (age-appropriate), liver enzymes Blood pressure each visit Out of range?
- Hematocrit >54% = blood too thick (donate or hold); high estradiol = manage it; a rising PSA = get the prostate checked.
