Masteron Dosage & Cycle Guide: Cutting, Competition Prep & TRT Addition (2026)

Masteron is a precision compound — its benefits are dose- and context-dependent in a way that differs from bulking steroids. Dosing it correctly means understanding not just the milligrams, but how it interacts with your testosterone base, what body fat percentage you are carrying, and what phase of preparation you are in. This guide provides dosing ranges for Masteron propionate and enanthate, complete cycle examples, and the specific stacking protocols that make it most effective.

Masteron Dosage Table

Experience Level	Weekly Dose (Prop or Enth)	Frequency	Notes
Beginner	300–400 mg/wk	EOD (Prop) or 2x/wk (Enth)	First use; run with testosterone base
Intermediate	400–600 mg/wk	EOD (Prop) or 2x/wk (Enth)	Competition prep standard range
Advanced	600–1000 mg/wk	EOD (Prop) or 2x/wk (Enth)	High androgenic load; hair loss risk maximised

Cutting Cycle: Masteron Propionate + Testosterone Propionate

The classic pre-competition stack. Short esters allow rapid dose adjustments and faster clearance ahead of a competition date.

Week	Testosterone Propionate	Masteron Propionate	AI	Notes
1–10	100 mg EOD	100 mg EOD	Aromasin 12.5 mg EOD (may not be required — assess)	Both injected EOD; can be combined in one syringe
PCT (wk 12–16)	Stop at wk 10	Stop at wk 10	Nolvadex 40/40/20/20	Begin PCT 4–5 days after last Prop injection

Competition Prep Cycle: Test Prop + Masteron + Winstrol

The premier UK competitive bodybuilding pre-contest protocol. Each compound serves a distinct role: testosterone provides the androgen base; Masteron hardens, dries, and inhibits aromatisation; Winstrol adds hardness, vascularity, and fat-free mass preservation. Browse our Winstrol products and see our UK competition prep guide.

Week	Test Prop	Masteron Prop	Winstrol (oral)	Support
1–8	100 mg EOD	100 mg EOD	50 mg/day	TUDCA 500 mg/day; omega-3; Aromasin if needed
PCT (wk 10–14)	Stop wk 8	Stop wk 8	Stop wk 8	Nolvadex 40/40/20/20

Off-Season Lean Bulk: Masteron Enanthate + Testosterone Enanthate

Using Masteron enanthate in an off-season cycle allows the compound's SHBG-binding and free testosterone enhancement to contribute to mass phase gains with reduced oestrogen-driven water retention.

Week	Testosterone Enanthate	Masteron Enanthate	AI
1–16	500 mg/wk	400 mg/wk	Aromasin 12.5 mg EOD (monitor; Masteron reduces AI requirement)
PCT (wk 18–22)	Stop wk 16	Stop wk 16	Nolvadex 40/40/20/20

AI Dosing with Masteron

Masteron's anti-oestrogenic properties reduce AI requirements compared to equivalent testosterone cycles without Masteron. At testosterone doses of 400–500 mg/week combined with Masteron 400 mg/week, some users require little to no AI. Blood oestradiol testing (target 20–40 pg/mL) is the correct way to guide AI dosing rather than a fixed protocol. See our AI products and our bloodwork monitoring guide.

Post Cycle Therapy

Masteron suppresses the HPG axis like all anabolic steroids. PCT timing depends on the ester used:

• Masteron Propionate: Begin PCT 4–5 days after the last injection
• Masteron Enanthate: Begin PCT 2 weeks after the last injection

Standard protocol: Nolvadex 40/40/20/20 mg over 4 weeks. See our complete PCT guide.

Frequently Asked Questions

Can Masteron be used as a TRT addition?

Yes. Some men on TRT (testosterone replacement therapy) add Masteron at low doses (100–200 mg/week) for its SHBG-binding and SHBG-mediated free testosterone enhancement, and for its libido and aesthetic benefits. This is off-label use and not clinically endorsed but is widely reported in the TRT community. Masteron's DHT-derived profile generally supports libido and mood well. See our TRT complete guide.

How quickly does Masteron Propionate work?

Users typically report noticeable effects (increased hardness, improved vascularity) within 10–14 days of starting Masteron Propionate. The short ester means blood levels reach near-peak by the end of the first week. This fast onset makes it useful for final pre-competition conditioning phases.