How It Works
Testosterone Cypionate is a long-acting ester of testosterone, the primary male sex hormone. When injected intramuscularly or subcutaneously, the cypionate ester slowly releases testosterone into the bloodstream over 7-10 days.
Testosterone binds to androgen receptors throughout the body, driving protein synthesis, bone mineral density, red blood cell production, cognitive function, mood regulation, and sexual function. In hypogonadal men, TRT restores testosterone to physiological levels.
Benefits
- Restoration of normal testosterone levels and symptom resolution
- Increased lean muscle mass and strength
- Improved bone mineral density
- Enhanced libido and sexual function
- Improved mood, energy, and cognitive function
- Reduced body fat percentage
Side Effects
- Hematocrit elevation (polycythemia) — most common, requires monitoring
- Estradiol elevation — may require aromatase inhibitor management
- Acne — mild to moderate in some patients
- Testicular atrophy — if used without HCG
- Fertility suppression — exogenous testosterone suppresses spermatogenesis
- Injection site reactions — pain, swelling at injection site
Dosing Protocol
| Parameter | Details |
|---|---|
| Starting Dose | 100-120mg/week |
| Maintenance Dose | 100-200mg/week (adjusted by labs) |
| Frequency | 2x/week (split dose) for stable levels |
| Administration | Intramuscular (vastus lateralis, deltoid) or subcutaneous |
| Lab Check | 6-8 weeks after starting, then every 6-12 months |