The Truth about Sustanon Injections and Side Effects

What is Sustanon?

Sustanon 250 injection is a product of Organon pharmaceutical company. Sustanon is an androgenic-anabolic steroid injection that is administered intramuscularly and the active compounds in this popular drug are four (4) different testosterone esters. 

It is the presence of the four testosterone esters that distinguish Sustanon from other exogenous testosterone steroid drugs. The testosterone esters in Sustanon include; propionate, decanoate, phenylpropionate, and isocaproate. 

In the world of bodybuilding, bodybuilders actively buy testosterone Sustanon when they need to run a bulking workout training program. “Sust” (as this drug is often called) will deliver a high dose of exogenous testosterone in the body. This will lead to an increase in anabolic effects culminating in greater lean skeletal muscle, power, and strength gains.

Describe Sustanon 250 Injection?

Sustanon 250 injection combines the anabolic effects of four testosterone esters, namely; isocaproate, decanoate, phenylpropionate, and propionate. With phenylpropionate and propionate, you have two testosterone esters that are fast acting while isocaproate and decanoate testosterone esters are slow acting in nature.  

When Sust is used the experience quick bodybuilding gains provided by the phenylpropionate and propionate testosterone esters while isocaproate and decanoate offer more sustainable anabolic effects over a longer period of time.

Sust injection is used in the same way as similar exogenous testosterone injections like Testosterone Enanthate (Test). Bodybuilders administer Sust injections once or twice in a week.

Each vial/ ampule of Sust consists of;

  • Testosterone propionate (30 mg),
  • Testosterone phenylpropionate (60 mg),
  • Testosterone isocaproate  (60 mg), and 
  • Testosterone decanoate  (100 mg).

When running a Sustanon cycle, bodybuilders cna experience the following benefits;

  • Weight Gain: Typically, bodybuilders can expect to gain about 20 Ibs of body weight during a Sust cycle. Fluid retention occurs during the cycle, but after a Sust cycle users would retain about two-thirds of their weight.
  • Skeletal Muscle Gain: Sust promotes an increase in nitrogen retention, Insulin growth factor (IGF-1), and protein synthesis which leads to improved skeletal muscle mass gains.
  • Performance-enhancing Benefits: Using Sust will increase the production of red blood cells in your body. Red blood cells are responsible for conveying oxygen-rich blood to every part of your body including your muscle tissue. 

This leads to a slower buildup of lactic acid in your skeletal muscle tissues during high interval intensity training (HIIT) causing you to have greater stamina, and endurance levels. 

Sust increases your energy, power, strength, agility, and aggression levels over a more sustained length of time compared to other exogenous testosterone products.

Sustanon Side Effects

Sust is no different from other similar testosterone steroids in terns of its side effects. Some of these side effects can be mild while others can be much more serious. However, the degree of severity of side effects will vary from one person to another and this is regardless of gender. When used, Sust will aromatize into estrogen. Estrogen is a female hormone that can be present in high amounts in male Sust users and cause them to experience feminization side effects. 

Persons that are in poor health or those that are more predisposed to side effects like acne or male pattern baldness, are also more than likely to encounter side effects (to a higher degree) when they use Sustanon. 

Some of the side effects of Sustanon use include;

  • Androgenic side effects, such as; heightened aggressiveness, scalp baldness, acne, and oily skin.
  • Feminization side effects, such as; fluid retention, gynecomastia (male breast enlargement), and testicular atrophy. Using anti-estrogen medication like Arimidex, Clomid, Nolvadex, and Proviron during post-cycle therapy can help to reduce estrogen levels in the body and prevent feminization side effects while restoring endogenous testosterone production. 
  • Increased low density lipoprotein (LDL) “bad” cholesterol levels.
  • Increased susceptibility to high blood pressure, hypertension, embolism, stroke, heart attack, and sudden death.

In female Sust users, the high concentration of testosterone can lead to masculinization side effects like clitoris enlargement, breast atrophy, male pattern baldness, increased hair growth on the face and body, and a deepening and hoarseness of the voice.

Sustanon 250 injection can adversely affect your cardiovascular health. While this steroid increases red blood cell production, this increase could also lead to blood clots which can cause stroke, cardiac arrest and other cardiovascular health problems. The use of about 4 g per day of fish oil (cod liver oil) supplements can help, but ultimately you should Endeavour to carry out regular blood lipids and cardio checkups with your physician.

Note that when it comes to cardiovascular side effects, Sustanon and indeed other testosterone steroids are the least harmful. Sustanon will not harm your liver since the drug is injected directly into your muscle tissue and not metabolized by the liver.

Sustanon Dosage

Sustanon can be effective for both bulking (increased body and muscle mass) and cutting (reduced body fat and weight) workout programs. Sust can increase metabolism which leads to the burning of fat for energy during HIIT, especially when food source is depleted in the body.

Sust can be used as a standalone drug or in a stack of other anabolic steroids. For bodybuilding beginners wishing to bulk up, they can run a seven (7) week Sustanon cycle as follows;

Week 1: 200 mg,

Week 2: 200 mg,

Week 3: 300 mg,

Week 4: 300 mg,

Week 5: 300 mg,

Week 6: 350 mg,

Week 7: 350 mg.

As a beginner, you begin with a Sust dosage of 200 mg for the first two weeks. You then increase your weekly Sust dosage to 300 mg from the third week right up to week 5. In week 6 and 7, you increase the dosage further to 350 mg per week.

You should begin PCT 4 weeks after your last Sustanon dosage in the 7th week. Testosterone decanoate has a 2 week half-life and therefore it takes some time before this ester is eliminated from your body. 

For intermediate and advanced level bodybuilders, a nine (9) week Sust cycle is appropriate with the following dosage;

Week 1: 250 mg,

Week 2: 250 mg,

Week 3: 500 mg,

Week 4: 500 mg,

Week 5: 500 mg,

Week 6: 500 mg,

Week 7: 500 mg,

Week 8: 500 mg,

Week 9: 250 mg.

From week 1 to 2, you use 250 mg of Sust per week. By week 3, you double (i.e. to 500 mg) your weekly dose and use this dosage right up to the eight week. In the ninth and final week, you then reduce the dosage by half (i.e. from 500 mg to 250 mg). 

High dosages will give even greater bodybuilding results, but note that you also expose yourself to an even greater risk of experiencing harsh side effects. You are therefore advised to seek guidance from your physician before running a Sust cycle.


Sustanon 250 injection is an synthetic exogenous testosterone drug that provides users with four key testosterone esters instead of just one like the case of Testosterone enanthate. 

These four esters provide users with anabolic and androgenic effects, but at different speeds with phenylpropionate and propionate being the fastest while decanoate and isocaproate are the slowest acting esters.

Using Sust has many advantages like increased bone density, skeletal muscles, and strength. However, Sust also has some drawbacks as well. Before you buy testosterone Sustanon and run a cycle, you are advised to consult with your physician or an experienced bodybuilding trainer.

Sust can be used in a stack of other steroids Including Anavar (for cutting), Deca-Durabolin, Trenbolone, and Anadrol. In all, Sustanon injection is generally safe for use if low to moderate weekly dosages are administered over a reasonable period of time. Also, do not forget to have a PCT plan in place to help restore your normal production of endogenous testosterone after reducing your estrogen levels.

jhon smith

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