Sustanon 250 Dosage & Cycle Guide: Beginner to Advanced (2026)

Sustanon 250 dosing follows many of the same principles as any testosterone preparation, but its multi-ester composition requires specific attention to injection frequency for optimal hormone stability. This guide covers correct dosing for TRT and performance use, complete cycle examples, oestrogen management, and PCT requirements.

Read our complete Sustanon 250 guide for background on the four-ester blend before planning your cycle.

Sustanon 250 Dosage by Application

Application	Weekly Dose	Frequency
TRT (physician-supervised)	125–250 mg/week	Twice weekly for stability
Conservative performance	250–500 mg/week	Twice weekly
Intermediate performance	500–750 mg/week	Twice weekly
Advanced	750–1000 mg/week	Twice weekly or EOD

Injection Frequency: Why Twice Weekly Matters

Unlike testosterone enanthate or cypionate — where weekly injections produce reasonably stable levels — Sustanon's short esters (propionate, phenylpropionate) cause rapid blood level peaks that require more frequent dosing for stability. Twice-weekly injection is the minimum recommended frequency for Sustanon 250; once-weekly creates pronounced peaks and troughs from the short esters.

For safe injection technique and site rotation, see our step-by-step injection guide.

Beginner Sustanon 250 Cycle

A beginner's first testosterone cycle using Sustanon 250:

• Weeks 1–12: Sustanon 250 — 500 mg/week (250 mg Mon + 250 mg Thu)
• Throughout: Arimidex 0.5 mg EOD or 1 mg twice weekly to manage oestrogen from aromatisation
• Throughout: Blood pressure monitoring; mid-cycle bloodwork at week 6
• Weeks 14–17: HCG 500 IU EOD for 3 weeks (bridge before PCT)
• Weeks 17–23: PCT — Nolvadex 20 mg/day for 6 weeks

Note: PCT starts approximately 3 weeks after the last Sustanon injection (to allow the decanoate ester to clear). See when to start PCT for the timing rationale.

Intermediate Sustanon Bulking Cycle

• Weeks 1–14: Sustanon 250 — 750 mg/week (375 mg Mon + 375 mg Thu)
• Weeks 1–12: Deca-Durabolin 400 mg/week (the classic Test + Deca stack)
• Throughout: Arimidex 0.5 mg EOD; Cabergoline 0.25 mg twice weekly (for Deca-related prolactin)
• Weeks 16–19: HCG 500 IU EOD
• Weeks 19–25: PCT: Nolvadex 20 mg/day + Clomid 50 mg/day for 6 weeks

For nutrition and recovery guidance to support this type of bulk cycle, see our nutrition guide for anabolic cycles.

Sustanon Cutting Cycle

• Weeks 1–12: Sustanon 250 — 500 mg/week (as TRT base)
• Weeks 1–12: Masteron Enanthate 400 mg/week
• Weeks 7–12: Winstrol 50 mg/day
• Throughout: TUDCA 750 mg/day (for Winstrol liver protection)

Oestrogen Management with Sustanon

Sustanon aromatises to oestrogen at the same rate as any testosterone preparation. The short esters in the blend can cause faster aromatisation peaks immediately after injection. An aromatase inhibitor (AI) is required at all performance doses. Arimidex (anastrozole) at 0.5–1 mg EOD or twice weekly is the standard approach. For the choice between AI options, see our Arimidex product range.

Frequently Asked Questions

Can Sustanon 250 be used for TRT?

Yes — Sustanon 250 is an MHRA-licensed TRT preparation in the UK and is prescribed on both the NHS and through private TRT clinics. For TRT use, a physician-supervised dose of 125–250 mg/week with twice-weekly injection produces stable therapeutic levels. See our TRT UK guide for the clinical TRT framework.

Is one ampoule of Sustanon 250 per week enough?

For TRT, 250 mg/week (one ampoule) is at the upper end of the therapeutic range and is a reasonable starting point. For performance enhancement, 500 mg/week (two ampoules) is the standard starting point for beginner cycles.

Does Sustanon need to be refrigerated?

No. Sustanon 250 should be stored at room temperature (below 25°C), away from light. Do not freeze. The oil-based preparation degrades if refrigerated and then warmed repeatedly.