Description
Testosterone Phenylpropionate 100 mg Astera Labs — testosterone propionate, Astera Labs, 100 mg. The fastest-acting commonly-used testosterone ester: two-day half-life means EOD injections for stable plasma levels but also quick washout if side-effects appear. Preferred for cutting cycles and pre-contest preparation where dose control matters.
Key Benefits
- Fast-acting testosterone — effects within days, not weeks
- Clean cycle tail — clears fast, shortens PCT window
- Precise dose control through frequent EOD injections
- PIP (post-injection pain) common — scale dose across sites
- Favoured for pre-contest cutting when rapid dial-in matters
- Each unit dosed at 100 mg — see Recommended Dosage below for protocol-specific intake
Recommended Dosage
Research dosing: 100 mg every other day (effective 350 mg/week) for performance; 25–50 mg EOD for TRT. Must pin at least EOD — spacing out drives peak-to-trough swings that amplify side-effects. Cycles 6–10 weeks typical.
How It Works
Testosterone esterified to propanoic acid (3-carbon ester). Short chain cleaves quickly in plasma, releasing free testosterone rapidly. Same biological activity as longer esters at the AR level — only release kinetics differ.
Potential Side Effects
PIP (post-injection pain) at site is the standard complaint. Oestrogenic sides manageable. Rapid cycle tail means HPTA recovery starts faster. Same androgenic/cardiovascular profile as other testosterone esters.
Cycle & Stacking Guide
Short-ester cycles 6–10 weeks. Favoured for pre-contest or when cycle-end flexibility matters. Pair with oral kickstart (winstrol/anavar) and/or trenbolone acetate for aggressive cutting.
Manufacturer Notes
Astera Labs produces a broad catalogue from research peptides to AAS oils. Lyophilised peptide vials ship with stability documentation.
Storage & Handling
Store upright at 15–25 °C in the original box, protected from light and moisture. Oil-based injectables are shelf-stable for the duration printed on the vial when kept at controlled room temperature. Do not refrigerate — cold thickens the carrier oil and makes drawing/injecting harder. Keep out of reach of children. For research and educational purposes only.
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