Masteron Enanthate 200 mg — Swiss Pharmaceuticals

Description

Masteron Enanthate 200 mg Swiss Pharmaceuticals — drostanolone from Swiss Pharmaceuticals at 200 mg. DHT derivative; cannot aromatise and actively inhibits aromatase. Cosmetic hardening effect is most dramatic below 12% body fat — the classic pre-contest use-case.

Key Benefits

DHT-derivative — dry, hard, vascular look with no water retention
Anti-estrogenic side-activity — mild AI effect
Cutting and pre-contest staple, especially at low body-fat
Minimal sides at performance doses — clean compound
Stacks well with tren, test, and orals for cutting recomp
Each unit dosed at 200 mg — see Recommended Dosage below for protocol-specific intake

Recommended Dosage

Research dosing: propionate 300–500 mg/week split EOD or 3×/week; enanthate 400–600 mg/week split twice weekly. Cycles 8–10 weeks (prop) or 10–14 weeks (eno). Pre-contest protocols stretch to final 6 weeks before show.

How It Works

5α-reduced testosterone with a 2α-methyl group. DHT-derivative — does not aromatise. Mild anti-estrogenic activity via aromatase enzyme competition. High AR affinity. Androgenic but not aggressively so at typical doses.

Pharmacokinetics

Propionate ester: plasma half-life ~2 days. Enanthate: ~7 days. Prop needs EOD or M/W/F pinning; eno twice-weekly fine. Steady-state in 2 weeks (prop) or 4 weeks (eno).

Cycle & Stacking Guide

Cutting stack component, 8–14 weeks by ester. Classic pairing: test E 250 mg/week + masteron E 400 mg/week + (optional) tren or winstrol for final weeks. Works best at <15% body fat where the "dry" look actually shows.

Manufacturer Notes

Swiss Pharmaceuticals is a research-compound producer with published batch QC data. Vials ship with tamper-evident caps and date-coded labels.

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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2D structural representation · PubChem CID 252748 ↗

Chemical Identity
#	CAS Registry Number	`13425-31-5`
Σ	IUPAC Name	[(2R,5S,8R,9S,10S,13S,14S,17S)-2,10,13-trimethyl-3-oxo-1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl] heptanoate
F	Molecular Formula	C₂₇H₄₄O₃
M	Molecular Weight	416.64 g/mol
⌬	SMILES	`CCCCCCC(=O)O[C@@H]1CC[C@@H]2[C@H]3CC[C@@H]4CC(=O)[C@@H](C)C[C@]4(C)[C@@H]3CC[C@]12C`
⊞	InChIKey	`RVZQLOBJNFHWOK-JBDPFAERSA-N`
△	Melting Point	Oil (liquid at RT) °C
≋	Solubility	Insoluble in water; soluble in oils
t½	Biological Half-life	7-10 days (IM)
⊕	PubChem CID	252748 ↗

Pharmacological Profile
Anabolic Rating	62
Androgenic Rating	25
Aromatization	None
Hepatotoxicity	None
Detection Time	3 months

Known trade names: Masteron Enanthate, Mast E

External references

Data sourced from published pharmacological literature and authoritative chemical databases (PubChem, DrugBank, ChEBI). Provided for identification and research reference only.

2D structural representation · PubChem CID 224004 ↗

Chemical Identity
#	CAS Registry Number	`521-12-0`
Σ	IUPAC Name	[(2R,5S,8R,9S,10S,13S,14S,17S)-2,10,13-trimethyl-3-oxo-1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl] propanoate
F	Molecular Formula	C₂₃H₃₆O₃
M	Molecular Weight	360.53 g/mol
⌬	SMILES	`CCC(=O)O[C@@H]1CC[C@@H]2[C@H]3CC[C@@H]4CC(=O)[C@@H](C)C[C@]4(C)[C@@H]3CC[C@]12C`
⊞	InChIKey	`VDIINQKPRNWKEH-GOGNSEEVSA-N`
△	Melting Point	124-126 °C
≋	Solubility	Insoluble in water; soluble in oils
t½	Biological Half-life	2.5 days (IM)
⊕	PubChem CID	224004 ↗

Pharmacological Profile
Anabolic Rating	62
Androgenic Rating	25
Aromatization	None
Hepatotoxicity	None
Detection Time	3 weeks

Clinical Notes

Mechanism & protocol-relevant pharmacology, reviewed by editorial pharmacology lead

DHT-derived injectable — 2alpha-methyl modification at the A-ring confers resistance to 3alpha-HSD, allowing intact muscle-cell activity. Cannot aromatise. Weak AR binding in skeletal tissue but displaces estradiol from SHBG, increasing free-testosterone fraction of any concurrent testosterone — this is the mechanism behind the hardening clinical picture at low body-fat percentages. Effect is visibly null above 15% body fat; below 12%, the lean-tissue definition response becomes dose-responsive. Propionate ester mandates EOD injection schedule; PIP is common and dose-dependent — low-viscosity MCT or GSO carrier oil reduces it materially. Androgenic effects (scalp, prostate) occur but are limited to DHT-sensitive populations.

Known trade names: Masteron, Drostopro, Mastabol

External references

Data sourced from published pharmacological literature and authoritative chemical databases (PubChem, DrugBank, ChEBI). Provided for identification and research reference only.

Masteron Enanthate 200 mg Swiss Pharmaceuticals