Testosterone Suspension: Cycle, Results, Benefits and Side Effects Explained

Testosterone is a key sex hormone produced primarily in the testicles of males and, to a lesser extent, in the ovaries of females. It plays a vital role in shaping male reproductive tissues, including the testes and prostate, and contributes to the development of traits like muscle mass, bone density, and facial hair growth, as well as influencing libido and overall energy levels in both genders. 

The unique characteristics of testosterone suspension lie in its swift onset of action, characterized by a rapid increase in testosterone levels facilitated by its water-based composition. This unique attribute sets it apart, particularly appealing to athletes who prioritize quick and immediate performance enhancement. 

Testosterone Suspension is widely known to promote quick and substantial muscle gains, heightened strength, and improved stamina in Canadian bodybuilders. It is a preferred option among athletes and bodybuilders, aiming to enhance their overall performance. 

What Is Testosterone Suspension?

Testosterone suspension is a synthetic variant of the male hormone testosterone known for its swift onset of effects, according to It stands out due to its aqueous suspension rather than an oil-based form, ensuring a rapid-acting injectable steroid. 

The chemical composition of testosterone suspension includes a vital 17-beta hydroxyl group, essential for its bioavailability and physiological impact on the body. It stands out among other forms of testosterone due to its distinctive characteristic of rapid onset without the presence of an ester. 

Unlike testosterone enanthate or testosterone cypionate, which rely on esters for gradual release, testosterone suspension offers a quicker and shorter-lived impact. While it appeals to those desiring immediate effects, the need for frequent administration and the possibility of injection site discomfort should be carefully weighed in the overall treatment evaluation. 

Read more about Testosterone Enanthate here: Ultimate guide on Testosterone Enanthate for Bodybuilding

Use Cases

Use cases of testosterone suspension have a prominence in athletic performance enhancement. Athletes and bodybuilders often turn to this form to quickly augment muscle strength and size, thereby improving overall physical performance.

Moreover, in some medical contexts, testosterone suspension is employed to address testosterone deficiency in individuals with specific medical conditions. 

Medical use

Medical use of testosterone suspension is commonly prescribed for conditions like hypogonadism, where the body struggles to produce an adequate amount of natural testosterone. It is employed to rectify hormonal imbalances, foster the development of secondary sexual characteristics, and aid overall health in individuals with testosterone deficiency. 

Testosterone Suspension Benefits for Bodybuilding

Testosterone suspension has four essential bodybuilding benefits, which include improved protein synthesis, muscle growth, strength increase, improved athletic performance, and improved nitrogen retention.  

Improved Protein Synthesis Muscle Growth

Testosterone suspension stands out as a potent anabolic steroid, known for its notable advantage in boosting protein synthesis—an essential mechanism for fostering muscle growth. Its capacity to enhance the efficiency of protein utilization contributes to a faster and more robust development of muscles, resulting in heightened strength and improved athletic performance. 

Strength Increase

Testosterone suspension, a swiftly absorbed injectable testosterone variant, is associated with significant strength gains in individuals who use it. The notable increase in strength is thought to stem from the prompt surge in testosterone levels, fostering heightened muscle protein synthesis and contributing to overall improved physical strength.

Improved Athletic Performance

Testosterone suspension is celebrated for its capacity to elevate athletic prowess. Athletes frequently opt for this supplement to enjoy heightened strength, endurance, and overall physical performance, establishing it as a favoured choice for individuals striving for competitive advantage across diverse sports and activities. 

Improved Nitrogen Retention

Testosterone suspension provides the advantage of heightened nitrogen retention, fostering an anabolic environment conducive to increased protein synthesis. This effect promotes muscle growth and accelerates post-exercise recovery, making testosterone suspension a valuable asset in enhancing athletic performance. 

Read more about Testosterone and its benefits here: Benefits of Testosterone

Testosterone Suspension Cycle and Dosage

Testosterone suspension cycle and dosage for males: 

  • A beginner dosage of testosterone suspension for males is a dose of 100mg/day for 4 weeks. 
  • Advanced male users must inject 200mg of testosterone suspension/day for 4-6 weeks. However, they can inject it more than once a day for better and faster results.
  • For advanced cycles, males can also bulk stack testosterone suspension combined with Dianabol at 25mg/day and Winstrol at 350 mg/day for extra hard muscles. 

Testosterone suspension cycle and dosage for females

Testosterone suspensions are usually not recommended for females because they may have androgenic effects. However, in rare cases, if it were to be used for the treatment of breast cancer, then: 

  • Testosterone suspension dosage in females should be between 50 mg and 100 mg, 2-3 times a week. 

Related: Ultimate Guide on Testosterone Cycle for Men and Women

Side Effects and Risks

Testosterone suppression

Testosterone suspension has the potential to induce testosterone suppression, leading to a reduction in natural testosterone production. This suppression can give rise to negative effects, including diminished libido, fatigue, and the risk of muscle loss, highlighting the necessity for cautious administration and close monitoring in hormone replacement therapy.

Androgenic Side Effects

Testosterone suspension can trigger androgenic side effects, including heightened facial and body hair growth, acne, and thinning of scalp hair due to its pronounced affinity for androgen receptors. Extended or excessive usage of testosterone suspension may exacerbate adverse effects on cardiovascular health, liver function, and mood.

High Blood Pressure

The use of testosterone suspension has been linked to a higher likelihood of elevated blood pressure, primarily attributed to its influence on fluid retention and sodium levels. Prolonged high blood pressure poses a significant risk of cardiovascular complications, underscoring the need for vigilant monitoring during testosterone suspension therapy.

Psychological Side Effects

Testosterone suspension has also been associated with psychological side effects, including mood swings, irritability, and heightened aggression. Prolonged or improper use of testosterone suspension may exacerbate these psychological issues, negatively impacting mental well-being and interpersonal relationships. 

Learn more about side effects of testosterone here: Side Effects of Testosterone Shots


How Does Testosterone Suspension Work in the Body?

Testosterone suspension functions by swiftly releasing unbound testosterone into the bloodstream upon administration, triggering a rapid and robust elevation in testosterone levels, fostering muscle development, and improving athletic performance.

How often do you need to inject testosterone suspension?

You need to inject testosterone suspension 2-3 times a week for effective results.

What type of testosterone is best for bodybuilding?

Testosterone cypionate is an androgenic steroid considered to be the best type of testosterone ester for bodybuilding. 

What is the difference between testosterone base and suspension?

Testosterone base is unesterified pure testosterone, whereas testosterone suspension is testosterone with a short-acting ester, enabling fast release and rapid onset of effects. 


  • Long-term effects of testosterone phenylacetate on sexual morphology and behavior in castrated male rats by (June 1970) Frank A Beach, Larry P Nucci
  • Testosterone Therapy in Men With Hypogonadism: An Endocrine Society Clinical Practice Guideline by (May 2018) Shalender Bhasin, Juan P Brito, Glenn R Cunningham, Frances J Hayes, Howard N Hodis, Alvin M Matsumoto, Peter J Snyder, Ronald S Swerdloff, Frederick C Wu, Maria A Yialamas
  • Using human genetics to understand the disease impacts of testosterone in men and women by (February 2020) Katherine S Ruth, Felix R Day, Jessica Tyrrell, Deborah J Thompson, Andrew R Wood, Anubha Mahajan, Robin N Beaumont, Laura Wittemans, Susan Martin, Alexander S. Busch, A. Mesut Erzurumluoglu, Benjamin Hollis, Tracy A. O’Mara, The Endometrial Cancer Association Consortium, Mark I McCarthy, Claudia Langenberg, Douglas F Easton, Nicholas J Wareham, Stephen Burgess, Anna Murray, Ken K Ong, Timothy M Frayling & John R. B. Perry
  • Circulating Testosterone as the Hormonal Basis of Sex Differences in Athletic Performance by (October 2018) David J Handelsman, Angelica L Hirschberg, Stephane Bermon

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