Technically yes, testosterone is a type of hormone called a steroid hormone. However medical use of testosterone brings levels back to normal, and 'doing steroids' refers to the abuse of these medications to bring levels many times over the normal limit for performance purposes. Voy only prescribes TRT when it's medically needed and only to bring levels back into a normal, health range.

What if I want to add hCG or another supporting medication?

Your specialist can add supporting medications where clinically appropriate — including hCG (to support fertility), aromatase inhibitors (to manage oestrogen), clomifene (to support your body's own production), or tadalafil (for sexual function). This is decided together during your consultation, based on your symptoms and your goals.

Can I buy testosterone online without a prescription in the UK?

No. Testosterone is a prescription-only medicine (POM) in the UK, which means it must be prescribed by a registered clinician after a proper assessment — including blood tests and a consultation. Anyone selling it without that is operating outside the law and putting your safety at risk.

Any time, through your account. There are no long contracts and no difficult conversations. If you'd prefer to pause rather than cancel, your specialist can work with you on that too.

How often do I inject Sustanon 250?

Typically once every twice a week, into a large muscle like the buttock or thigh. Your specialist will confirm your exact frequency based on your blood test results — some members do slightly better with shorter intervals. The first injection is done with a clinician as part of your included injection training.

How long does Sustanon 250 stay in my system?

The four esters in Sustanon release at different rates — the propionate within about 4–5 days, the phenylpropionate and isocaproate over 8–11 days, and the decanoate over 18 days. In practice, that means testosterone levels build over the first weeks of treatment and gradually level out. Full clearance from your system takes several months once treatment stops, because the longest ester (decanoate) takes the longest to leave.

Is Sustanon safe for people with peanut or soy allergies?

No. Sustanon 250 is formulated in peanut oil and contains trace soy proteins, so it's not suitable for anyone with a peanut or soy allergy. Let your specialist know during your consultation and they'll recommend cypionate or enanthate instead.

Do I inject Sustanon subcutaneously or intramuscularly?

Intramuscularly, into a large muscle. Sustanon's oil is thicker than some alternatives, which is why subcutaneous injection isn't appropriate for this formulation. Your specialist and injection training will walk you through the right technique, needle length and site rotation.

How should I store Sustanon 250?

Store at room temperature (below 25°C), out of direct sunlight and out of reach of children. Don't refrigerate. If the oil ever looks cloudy or has visible crystals, warm the vial gently between your hands before use — don't heat it. Always check the expiry date on the vial.

Will Sustanon affect my fertility?

Yes — like all forms of testosterone replacement, Sustanon can suppress your body's own sperm production. If you're planning to have children in the near term, your specialist will discuss adding hCG or clomifene to your plan to support fertility, or recommend a different approach.

Testosterone

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Sustanon 250

Sustanon

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Sustanon 250 is an injectable testosterone replacement therapy that blends four testosterone esters (propionate, phenylpropionate, isocaproate, and decanoate) in a single vial.

Each ester releases at a different rate — from a few days up to two or three weeks — which helps keep your testosterone levels steady for longer between doses.

It's given as an intramuscular injection into a large muscle, like the buttock or thigh, typically once or twice a week.

Dr Earim Chaudry, Chief Medical Officer

Begin with a blood test to confirm TRT is right for you

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Ongoing medical support

Backed by science

Free, discreet delivery

Cancel anytime

Ongoing medical support

How to get started

Before we can prescribe any form of testosterone replacement therapy, we'll need a clear picture of your levels. That means two blood tests: an at-home finger-prick test to check your baseline, and a follow-up venous test to confirm your results. Once your results are in, you'll have a consultation with a TRT specialist to go through them together. They'll only recommend treatment if it's clinically right for you — and they'll tailor the plan to your levels, your symptoms and your lifestyle.

Complete your assessment

10 quick questions so we understand your symptoms

Take your blood tests

An at-home finger-prick test, followed by an in-depth venous test

Meet your specialist

A consultation to review your results and design your plan

Start treatment

Your medication and supplies arrive in discreet packaging

Why Voy

What is Sustanon 250?

Sustanon 250 is an injectable form of testosterone replacement therapy that combines four different testosterone esters in a single vial: testosterone propionate, phenylpropionate, isocaproate and decanoate. An 'ester' just means a different form/type of testosterone, and each is released at a different rate. The propionate within the first few days, the phenylpropionate and isocaproate over roughly a week, and the decanoate over two to three weeks.

The idea behind the four-ester blend is to give you steady testosterone levels for longer between doses, so you can inject less often while keeping your levels in the therapeutic range. Sustanon is given as an intramuscular injection (into a large muscle like the buttock or thigh), typically twice a week, but it can be given just once a week.

1 Steadier energy through the day

2 Clearer focus and less brain fog

3 Better mood and motivation

4 A return of sex drive

5 Strength and muscle that respond to your training

TESTIMONIALS

Voy is transforming lives

145

increase in Free Testosterone

"It's been life-changing. I feel better within myself, I have more life about me."

Mood

Energy

Presence

Stephen, 53

127

increase in Free Testosterone

"There's more life about me."

Energy

Motivation

James, 39

145

increase in Free Testosterone

"My boss has seen such a difference."

Focus

Performance

Confidence

Andy, 47

Side effects

Everybody is different and so is every treatment at Voy

We offer a wide range of TRT treatments

Sustanon 250

A blended testosterone injection designed for steady, sustained hormone release.

Method

Intramuscular injection

Frequency

~Every 3 weeks

Price / month

£99

Testosterone cream

A daily testosterone cream for smooth, consistent hormone support.

Method

Topical

Frequency

Daily

Price / month

£129

Testosterone cypionate

Our most popular, well tolerated testosterone, for maintaining stable hormone levels.

Method

Injection (SC or IM)

Frequency

2–3× weekly

Price / month

£129

Testosterone cypionate + HCG

Top testosterone formula with HCG for testicular and sperm support.

Method

Injection + injection

Frequency

2–3× weekly + 2–3× weekly

Price / month

£169

Clomid (clomiphene citrate)

A non-testosterone option that boosts natural testosterone production.

Method

Oral tablet

Frequency

Every other day

Price / month

£99

FAQ

Testosterone cream: Everything you need to know

Dr. Jeff Foster, Director of Men's Health

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References

^¹

Figueiredo, Maria Gabriela, et al. “Testosterone Therapy with Subcutaneous Injections: a Safe, Practical, and Reasonable Option,” The Journal of Clinical Endocrinology and Metabolism, vol. 107, issue 3, 2021:614-626 https://pmc.ncbi.nlm.nih.gov/articles/PMC9006970/.

^²

Forsdahl, Guro, et al. “Detection of Testosterone Esters in Blood,” Drug Testing and Analysis, vol. 7, issue 11-12, 2015:983-989 https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/10.1002/dta.1914.

^³

“Intramuscular and Subcutaneous Injection Technique,” Nottingham University. https://www.nottingham.ac.uk/nursing/practice/clinicalskills/resources/procedures/imscinjection/needles.php. Accessed 11 Dec. 2024.

At-Home Testosterone Blood Test

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Sustanon

How to get started

Why Voy

What is Sustanon 250?

What testosterone treatment can help with

Voy is transforming lives

Side effects

Everybody is different and so is every treatment at Voy

Testosterone cream: Everything you need to know

Low T symptoms

Know the symptoms

Benefits of TRT

How TRT can help

How much does TRT cost?

Breaking down TRT costs