Testosterone Undecanoate

Designed for long-term stability and consistent hormone support, Testosterone Undecanoate 250 mg/ml by Alpha BioPharma is the premium choice for testosterone replacement therapy and gender-affirming hormone care. With its ultra-long half-life and premium grapeseed oil formulation, it ensures smooth injections, steady testosterone levels, and reduced fluctuations, setting the standard in quality and performance.

It is primarily used in testosterone replacement therapy (TRT) for men with hypogonadism and in gender-affirming therapy for transgender men.

Description

Product Overview

Testosterone Undecanoate 250 mg/ml by Alpha BioPharma is an ultra-long-acting injectable testosterone ester, designed for sustained and stable hormone release. With a half-life of 20–34 days, it requires far fewer injections compared to shorter esters, making it the preferred option for long-term testosterone replacement therapy (TRT) and gender-affirming hormone therapy.

Thanks to its slow release and reduced aromatization, Testosterone Undecanoate provides steady testosterone levels, improved quality of life, and fewer fluctuations in mood, energy, and libido.


Composition

Each 1 ml injectable solution contains:

  • Testosterone Undecanoate – 250 mg

  • Benzyl Alcohol (BA) – 2.0% (preservative)

  • Benzyl Benzoate (BB) – 20.0% (solvent/stabilizer)

  • Grapeseed Oil – q.s. to 1 ml (carrier solvent)

Formulated with premium grapeseed oil for smooth injections, stable release, and reduced risk of irritation.


Pharmacological Profile

  • Class: Anabolic-Androgenic Steroid (AAS) – Testosterone derivative

  • Ester: Undecanoate (ultra-long acting)

  • Half-life: 20–34 days

  • Release: Maintains stable testosterone levels for up to 10–14 weeks (after initial loading doses)

  • Aromatization: Yes, but less compared to shorter esters → reduced estrogenic side effects


Benefits & Effects

  • Stable Testosterone Levels: Long half-life provides consistent hormone support

  • Reduced Injections: Requires far fewer administrations than Enanthate or Cypionate

  • Improved Tolerance: Lower peaks and troughs reduce mood swings and side effects

  • Preferred for TRT: Especially effective in male hypogonadism and gender-affirming therapy

  • Quality of Life Improvements: Increases libido, muscle mass, bone density, and energy levels


Recommended Dosage & Use

  • Standard Dose: 250 mg (1 ml) per week

  • Injection Frequency: Typically once every 2–4 weeks (after stabilization/loading protocol)

  • Cycle Length: Long-term therapy for TRT or hormone support

  • Note: Not usually used for bodybuilding cycles due to extended ester release

💡 Often chosen for medical testosterone replacement rather than short-cycle performance enhancement.


Possible Side Effects

  • Injection site reactions (pain, swelling, redness)

  • Increased libido

  • Gynecomastia (due to estrogen conversion)

  • Fluid retention

  • Acne, oily skin

  • Fluctuations possible if injections are not consistent


Contraindications

Do not use if you have:

  • Prostate or breast cancer (androgen-sensitive tumors)

  • Severe cardiac, hepatic, or renal disease

  • Pregnancy or lactation

  • Hypersensitivity to grapeseed oil or formulation compounds


Storage Guidelines

  • Store below 30°C (86°F)

  • Do not freeze

  • Protect from light in original packaging

  • Shelf life: 3 years unopened

  • Single-use vial: discard unused portion after opening


Why Choose Alpha BioPharma Testosterone Undecanoate?

  • Produced with A-grade testosterone raws

  • Premium grapeseed oil carrier for biocompatibility and stability

  • Ultra-long ester for steady, reliable results with fewer injections

  • Each batch tested for sterility, potency, and purity

  • Market-leading quality for hormone therapy and performance support

Additional information

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