Description
Test PH100 100 mg Magnus Pharmaceuticals — Testosterone Cypionate — eight-day ester, US-market TRT and performance standard. Functionally identical to enanthate at the receptor level. Each unit dosed at 100 mg.
Key Benefits
- Functionally equivalent to testosterone enanthate at the receptor level
- Slightly longer ester — weekly pinning produces flatter plasma curves
- US-market standard for TRT and performance use
- Full aromatisation — AI on hand from day one
- Foundation compound for every common stack protocol
- Each unit dosed at 100 mg — see Recommended Dosage below for protocol-specific intake
Recommended Dosage
Research dosing: TRT 100–200 mg/week; first cycle 400–500 mg/week; intermediate 500–600 mg/week; advanced 700+ mg/week. Split across 2 injections per week even though once-weekly is pharmacokinetically acceptable — flatter plasma smooths E2 management.
How It Works
Testosterone esterified to cyclopentanepropionic acid. Plasma esterases cleave the ester, releasing free testosterone to bind the AR across muscle, bone, and CNS. Functionally identical to enanthate in biological activity; ester difference affects only release kinetics.
Pharmacokinetics
Plasma half-life approximately 8 days. Once-weekly acceptable but produces a ~2× peak-trough swing; twice-weekly preferred. Steady-state at week 4–6. Clearance slower than enanthate — PCT begins 14 days after last pin.
Potential Side Effects
Standard testosterone side-effect profile: oestrogenic (manageable with AI), androgenic (genotype-dependent), HPTA suppression (universal). Hematocrit rise common above 500 mg/week — pull CBC mid-cycle.
Cycle & Stacking Guide
Cycle base, 12–16 weeks. Stack as with enanthate: deca/anadrol (mass), primobolan/boldenone (lean-gain), trenbolone/masteron (cutting). PCT at day 14 post-last-injection with Clomid 50mg + Nolva 20mg for 4 weeks.
Manufacturer Notes
Magnus Pharmaceuticals focuses on the research-chemical end of the market with detailed batch identifiers. Injectables use cotton-seed or grape-seed oil for reduced PIP.
Storage & Handling
Store at recommended temperature (15–25°C; peptides and HGH at 2–8°C after reconstitution). Protect from light and moisture. Keep out of reach of children. For research and educational purposes only.





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